IEDA
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Older retrieved projects from AMD. Warning: many have incomplete information.
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Project Title/Abstract/Map NSF Award(s) Date Created PIs / Scientists Dataset Links and Repositories
Collaborative Research: Conference: Conference support for the 2nd RAID Science Planning Workshop

2348964
2348965
2025-06-26 Goodge, John; Shackleton, Sarah
The future of deep ice-sheet research in Antarctica with the Rapid Access Ice Drill: A Long-Range Science Drilling Implementation Plan resulting from the 2nd RAID (Rapid Access Ice Drill) Science Planning Workshop
USAP-DC
FINAL AWARD REPORT: 2nd RAID Science Planning Workshop
USAP-DC
Collaborative Research: EAGER: GASHES: Getz Antarctic Submarine Hydrothermal Vents Exploratory Study

2303978
2025-06-05 Loose, Brice; Wellner, Julia No dataset link provided
Wave Glider Observations of Surface Fluxes and Mixed-layer Processes in the Southern Ocean

1558448
1853291
2025-01-15 Girton, James; Thomson, Jim
LMG2002 Expedtition Data
R2R
APL-UW Southern Ocean Wave Glider Data from 2019/20 Mission
USAP-DC
Wave Glider Data from 2016/17 Mission
University of Washington
Data from 2020 WG recovery cruise LMG2002
R2R
Data from 2017 WG recovery cruise LMG1703
R2R
Data from 2019 WG launch cruise LMG1909
R2R
Data from 2016 WG launch cruise LMG1612
R2R
Expedition Data of LMG1909
R2R
Expedition data of LMG1612
R2R
Expedition Data
R2R
RAPID: Is Biomass Mobilization at Ice-covered Lake Fryxell, Antarctica reaching a Critical Threshold?

2336354
2024-07-05 Juarez Rivera, Marisol
Lake Fryxell 2022-2023 benthic microbial mat thickness and number of laminae
USAP-DC
Deciphering Changes in Atmospheric Nitrous Oxide Concentration During the Last Ice Age Using the Intramolecular Site-Preference of Nitrogen Isotopes

1903681
2024-06-19 Brook, Edward
Final N2O isotopic data including isotopomer ratios for the last deglaciation and Heinrich Stadia 4/Dansgaard Oeschger Event 8
USAP-DC
Preliminary nitrous oxide site preference isotopic data for last deglaciation from Taylor Glacier
USAP-DC
Tracing Past Methane Variations with Stable Isotopes in Antarctic Ice Cores

1745078
2023-05-01 Brook, Edward
Atmospheric methane across the Last Glacial Maximum and deglaciation from the GISP2, NEEM and WAIS Divide ice cores
USAP-DC
Carbon-13 and Deuterium isotopic composition of atmospheric methane across Heinrich Stadial 4, and Dansgaard Oesgher Event 8, WAIS Divide Replicate Ice Core, Antarctica
USAP-DC
Carbon-13 isotopic composition of atmospheric methane across Heinrich Stadials 1 and 5, and Dansgaard Oesgher Event 12, WAIS Divide Ice Core, Antarctica
USAP-DC
Atmospheric methane interpolar difference and four-box troposphere model output across the Last Glacial Maximum and Deglaciation
USAP-DC
Collaborative Research: Investigating Biogeochemical Fluxes and Linkages To Climate Change With Multi-Scale Observations In The Drake Passage

1543457
1543511
2023-02-22 Munro, David; Sweeney, Colm; Lovenduski, Nicole S; Stephens, Britton
Surface underway measurements of partial pressure of carbon dioxide (pCO2) during the Antarctic Research and Supply Vessel (ARSV) Laurence M. Gould expeditions in the the Southern Ocean, South Pacific Ocean, Drake Passage and South Atlantic Ocean from 2019-02-16 to 2020-02-11 (NCEI Accession 0208838)
NCEI
Surface underway measurements of partial pressure of carbon dioxide (pCO2) during the Antarctic Research and Supply Vessel (ARSV) Laurence M. Gould expeditions in the the Southern Ocean, South Pacific Ocean, Drake Passage and South Atlantic Ocean in 2020 (NCEI Accession 0225445)
NCEI
Underway measurements of pCO2 in the Surface Waters and the Atmosphere During the ARSV Laurence M. Gould 2017 Expeditions processed by NOAA (NCEI Accession 0170337)
NCEI
Surface underway measurements of partial pressure of carbon dioxide (pCO2) during the Antarctic Research and Supply Vessel (ARSV) Laurence M. Gould expeditions in the the Southern Ocean, Drake Passage, South Atlantic Ocean in 2022 (NCEI Accession 0276577)
NCEI
Surface underway measurements of partial pressure of carbon dioxide (pCO2) during the Antarctic Research and Supply Vessel (ARSV) Laurence M. Gould expeditions in the the Southern Ocean, South Atlantic Ocean in 2021 (NCEI Accession 0246983)
NCEI
Surface underway measurements of partial pressure of carbon dioxide (pCO2) during the Antarctic Research and Supply Vessel (ARSV) Laurence M. Gould expeditions in the Southern Ocean, Drake Passage and South Atlantic Ocean in 2018, processed by NOAA (NCEI Accession 0184338)
NCEI
Measuring an Ice-core Proxy for Relative Oxidant Abundances over Glacial-interglacial and Rapid Climate changes in a West Antarctic Ice Core

1542723
2023-02-13 Alexander, Becky
WAIS Divide ice core nitrate isotopes
USAP-DC
Collaborative Research: An Ice Core from Hercules Dome, East Antarctica

1841844
1841858
1841879
2023-02-06 Steig, Eric J.; Fudge, T. J. No dataset link provided
Life in Ice: Probing Microbial Englacial Activity through Time

2037963
2022-10-11 Smith, Heidi; Foreman, Christine; Dieser, Markus No dataset link provided
Measuring Dissolved Gases to Reveal the Processes that Drive the Solubility Pump and Determine Gas Concentration in Antarctic Bottom Water

1744562
2022-09-14 Loose, Brice
NBP1704 Expedition Data
R2R
Expedition Data of NBP1704
MGDS
PIPERS Noble Gases
USAP-DC
Collaborative Research: Testing Next Generation Measurement Techniques for Reconstruction of Paleoclimate Archives from Thin or Disturbed Ice Cores Sections

2149518
2022-08-07 Fudge, T. J.; Fegyveresi, John M
ALHIC2201 and ALHIC2302 3D ECM and Layer Orientations
USAP-DC
Collaborative Research: Diversity and ecological impacts of Antarctic mixotrophic phytoplankton

1744767
2022-07-27 Sanders, Robert; Gast, Rebecca; Jeffrey, Wade H.
Companion datasets to Diversity of microbial eukaryotes along the West Antarctic peninsula in austral spring.
Figshare
NBP1910_protist_community_RNA Raw sequence reads; NBP2205_protist_community_RNA Raw sequence reads will be made available here after processing is completed
NCBI
LMG1904 expedition data
R2R
Expedition Data of NBP 2205
R2R
Expedition Data of NBP1910
R2R
The Role of Wave-sea Ice Floe Interactions in Recent Antarctic Sea Ice Change

1643431
2022-07-19 Bitz, Cecilia
Model output: NEMO-CICE with an emergent sea ice floe size distribution described in Roach et al (2018)
Zenodo
Model output from experiments (IC4M5) described in Cooper et al 2022.
Zenodo
Model output from experiments (IC4M3rad) described in Cooper et al 2022.
Zenodo
Model output from experiments (IC4M2) described in Cooper et al 2022.
Zenodo
Model output from experiments (FSD-M21) described in Cooper et al 2022.
Zenodo
Model output from experiments (IC4M1) described in Cooper et al 2022.
Zenodo
Model output from experiments (IC4M4) described in Cooper et al 2022.
Zenodo
Model output from experiments (IC4M7) described in Cooper et al 2022.
Zenodo
Model output: CICE experiments with varying floe and wave physics described in Roach et al. (2019)
Zenodo
Analysis code, processed observational data and climate model output required to produce figures for Roach et al (2022)
Zenodo
Targeted Basic Research to Enable Antarctic Science Applications of Cosmogenic-Nuclide Geochemistry

2139497
2022-06-21 Balco, Gregory No dataset link provided
Collaborative Research: Reconstructing Carbon-14 of Atmospheric Carbon Monoxide from Law Dome, Antarctica to Constrain Long-Term Hydroxyl Radical Variability

1643716
1643664
1643669
2022-06-17 Petrenko, Vasilii; Murray, Lee T; Buizert, Christo; Petrenko, Vasilii; Murray, Lee T
Concentration and isotopic composition of atmospheric N2O over the last century
USAP-DC
Law Dome DE08-OH firn air 15N, O2/N2, Ar/N2, 18O of O2
USAP-DC
Law Dome firn air and ice core 14CO concentration
USAP-DC
Law Dome DE08-OH site noble gases in ice: testing the 86Krexcess proxy
USAP-DC
What Processes Drive Southern Ocean Sea Ice Variability and Trends? Insights from the Energy Budget of the Coupled Cryosphere-ocean-atmosphere System

1643436
2022-06-10 Donohoe, Aaron; Schweiger, Axel
Partionining of CERES planetary albedo between atmospheric and surface reflection
USAP-DC
Center for Oldest Ice Exploration

2019719
2022-05-21 Neff, Peter; Brook, Edward J.
Allan Hills ice water stable isotope record for dD, d18O
USAP-DC
Allan Hills ice water stable isotope record for dD, d18O
USAP-DC
Allan Hills CMC3 ice core d18Oatm, d15N, dO2/N2, dAr/N2, d40/36Ar, d40/38Ar 2021 & 2022
USAP-DC
Airborne Radar Data: 2023-24 (CXA2) flight based data HDF5/matlab format
OPR
NSF COLDEX 2023-24 Riegl Laser Altimeter Level 2 Geolocated Surface Elevation Triplets
Texas Data Repository
Airborne Radar Data: 2022-23 (CXA1) flight based HDF5/matlab format data
OPR
Rising Seas: Representations of Antarctica, Climate Change, and Sea Level Rise in U.S. Newspaper Coverage
University Digital Conservancy
Snapshot record of CO2 and CH4 from the Allan Hills, Antarctica, ranging from 400,000 to 3 million years old
USAP-DC
Replicate O-17-excess by continuous flow laser spectroscopy for an ice core section at Summit, Greenland
USAP-DC
Allan Hills I-188 Field Season Report 2022-2023
USAP-DC
2023-2024 Allan Hills End-of-Season Science Report
USAP-DC
Social network analysis to understand participant engagement in transdisciplinary team science: a large U.S. science and technology center case study
UMN University Digital Conservancy
2019-2020 Allan Hills Field Report
USAP-DC
Heavy noble gases (Ar/Xe/Kr) from ALHIC1901, 1902, and 1903
USAP-DC
CO2 and CH4 from Allan Hills ice cores ALHIC1901, 1902, and 1903
USAP-DC
MOT data (Xe/Kr) from Allan Hills ice cores ALHIC1901, 1902, and 1903
USAP-DC
Basal Ice Unit Thickness Mapped by the NSF COLDEX MARFA Ice Penetrating Radar
USAP-DC
I-165-M GPR Field Report 2019-2020
USAP-DC
NSF COLDEX 2022-23 Level 2 Basal Specularity Content Profiles
Texas Data Repository
NSF COLDEX 2023-24 Level 2 Basal Specularity Content Profiles
Texas Data Repository
NSF COLDEX 2022-23 GNSS/IMU Level 1 instrument measurements from Dome A, East Antarctica
USAP-DC
NSF COLDEX Ice Penetrating Radar Derived Grids of the Southern Flank of Dome C
Texas Data Repository
NSF COLDEX/Open Polar Radar Example Delay Doppler Classification of Englacial Reflectors
Texas Data Repository
COLDEX VHF MARFA Open Polar Radar radargrams
Texas Data Repository
2024-2025 I-187 End of season science report
USAP-DC
Concentration and flux of ice core dust from ALHIC1903 drilled at the Allan Hills Blue Ice Area
USAP-DC
Strontium and neodymium isotope compositions of ice core dust from ALHIC1903 drilled at the Allan Hills Blue Ice Area
USAP-DC
Rare earth elemental concentrations of leached ice core dust from ALHIC1903 drilled at the Allan Hills Blue Ice Area
USAP-DC
Oxygen and hydrogen isotope compositions and associated d-excess of ice from ALHIC1903 drilled at the Allan Hills Blue Ice Area
USAP-DC
NSF COLDEX Raw MARFA Ice Penetrating Radar data
USAP-DC
NSF COLDEX 2022-2023 Airborne Season (CXA1): Level 1 gravimeter instrument measurements
Texas Data Repository
NSF COLDEX 2022-2023 Airborne Season (CXA1): Level 1B Serial Instrument Measurements
Texas Data Repository
2022-23 Allan Hills Intermediate Ice Core Site Selection Field Report
USAP-DC
Allan Hills 2022-23 Shallow Ice Core Field Report
USAP-DC
Airborne Radar Data: 2022-23 (CXA1) transect based (science organized) unfocused data
Texas Data Repository
ALHIC2201 and ALHIC2302 3D ECM and Layer Orientations
USAP-DC
Airborne Radar Data: 2023-24 (CXA2) transect based (science organized) unfocused data
Texas Data Repository
NSF COLDEX 2022-23 Riegl Laser Altimeter Level 2 Geolocated Surface Elevation Triplets
Texas Data Repository
Collaborative Research: Diagnosing the Role of Ocean Eddies in Carbon Cycling from a High-resolution Data Assimilating Ocean Biogeochemical Model

2149500
2022-03-14 Williams, Nancy; Chambers, Don; Tamsitt, Veronica No dataset link provided
Collaborative research: Snapshots of Early and Mid-Pleistocene Climate and Atmospheric Composition from the Allan Hills Blue Ice Area

1744993
1744832
1745006
0838843
1745007
2021-08-27 Mayewski, Paul A.; Kurbatov, Andrei V.; Brook, Edward J.; Severinghaus, Jeffrey P.; Higgins, John
Allan Hills 2022-23 Shallow Ice Core Field Report
USAP-DC
Heavy noble gases (Ar/Xe/Kr) from ALHIC1901, 1902, and 1903
USAP-DC
I-165-M GPR Field Report 2019-2020
USAP-DC
Allan Hills Stable Water Isotopes
USAP-DC
CO2 and CH4 from Allan Hills ice cores ALHIC1901, 1902, and 1903
USAP-DC
Allan Hills CMC3 ice core d18Oatm, d15N, dO2/N2, dAr/N2, d40/36Ar, d40/38Ar 2021 & 2022
USAP-DC
Snapshot record of CO2 and CH4 from the Allan Hills, Antarctica, ranging from 400,000 to 3 million years old
USAP-DC
MOT data (Xe/Kr) from Allan Hills ice cores ALHIC1901, 1902, and 1903
USAP-DC
Antarctica as a Model System for Responses of Terrestrial Carbon Balance to Warming

1643871
1947562
2021-08-21 van Gestel, Natasja
Soil moisture and soil temperature data (0-5 cm) near Palmer Station, Antarctica
USAP-DC
2022-2023 Palmer Station terrestrial carbon fluxes - field warming experiment
USAP-DC
CAREER: Ecosystem Impacts of Microbial Succession and Production at Antarctic Methane Seeps

2046800
2021-08-21 Thurber, Andrew No dataset link provided
Integrating petrologic records and geodynamics: Quantifying the effects of glaciation on crustal stress and eruptive patterns at Mt. Waesche, Executive Committee Range, Antarctica

2122248
2021-08-19 Waters, Laura; Naliboff, John; Zimmerer, Matthew No dataset link provided
Physiological Ecology of "Herbivorous" Antarctic Copepods

1746087
2021-08-06 Tarrant, Ann
Rhincalanus gigas: Transcriptome and gene expression data; BioProject PRJNA666170
NCBI
Expedition data of LMG1901
R2R
Calanoides acutus: Transcriptome and gene expression data; BioProject PRJNA757455
NCBI
Calanus propinquus: Transcriptome and gene expression data; BioProject PRJNA669816
NCBI
From Air Sacs to Tissues: Oxygen Transfer and Utilization in Diving Emperor Penguins

1643532
2021-07-30 Ponganis, Paul
Emperor penguin air sac oxygen
Dryad
Blood oxygen transport and depletion in diving emperor penguins
Dryad
Collaborative Research: Uncertainty and Mechanisms of Antarctica’s Changing Snowfall and its Role in Sea Level Change

1952199
2021-07-21 Schneider, David; Datta, Rajashree Tri
Variable-resolution CESM2 over Antarctica (ANTSI): Monthly outputs used for evaluation
Zenodo
Collaborative Research: Long Term Sublimation/Preservation of Two Separate, Buried Glacier Ice Masses, Ong Valley, Southern Transantarctic Mountains

1445205
2021-07-16 putkonen, jaakko; Balco, Gregory; Morgan, Daniel
Cosmogenic-Nuclide data at ICE-D
ICE-D
Old Ice, Ong Valley, Transantarctic Mountains
USAP-DC
The Role of Cyclonic Upwelling Eddies in Southern Ocean CO2 Flux

2048840
2021-06-16 Williams, Nancy; Lindstrom, Eric; Carter, Brendan; Chambers, Don
Surface underway measurements of partial pressure of carbon dioxide (pCO2), sea surface temperature, sea surface salinity and other parameters from Autonomous Surface Vehicle (ASV) Saildrone 1039 (EXPOCODE 316420220901) in the Indian Ocean, Southern Ocean from 2022-09-01 to 2023-04-27 (NCEI Accession 0300658)
NCEI
Surface underway measurements of partial pressure of carbon dioxide (pCO2), sea surface temperature, sea surface salinity and other parameters from Autonomous Surface Vehicle (ASV) Saildrone 1038 (EXPOCODE 316420220616) in the Indian Ocean, Southern Ocean from 2022-06-16 to 2022-07-26
NCEI
Physical and chemical surface observations in the South Indian Ocean from two uncrewed sailing vehicles.
University of South Florida (via DigitalCommons)
New Cosmogenic 21Ne and 10Be Measurements in the Transantarctic Mountains

2048351
2021-02-26 Lindow, Julia; Kurz, Mark D.
Cosmogenic nuclide data for Bennett Platform, Antarctica
USAP-DC
Collaborative Research: Systematic Analysis of Landscape Evolution and Surface Ages in Transantarctic Mountains

0838968
0838757
2020-12-20 Balco, Gregory; Putkonen, Jaakko; Morgan, Daniel
Interface to observational data and geologic age information calculated therefrom
ICE-D
Web page with links to files containing cosmogenic noble gas concentrations and related analytical data
PI website
Collaborative Research: Last Glacial Maximum and Deglaciation Chronology for the Foundation Ice Stream and Southeastern Weddell Sea Embayment

0838256
0838784
0838783
2020-12-19 Balco, Gregory; Todd, Claire; Conway, Howard
Interface to observational data collected in this project and geologic age information derived therefrom. Dynamic content, continuously updated.
ICE-D
Web page linking to documents containing data collected in this project. Static content
PI website
Collaborative Research: Chemoautotrophy in Antarctic Bacterioplankton Communities Supported by the Oxidation of Urea-derived Nitrogen

1643345
1643466
2020-12-18 Hollibaugh, James T.; Popp, Brian
"Collaborative research: Chemoautotrophy in Antarctic bacterioplankton communities supported by the oxidation of urea-derived nitrogen"
BCO-DMO
Expedition data of LMG1801
R2R
Collaborative Research: Integrating Eocene Shark Paleoecology and Climate Modeling to reveal Southern Ocean Circulation and Antarctic Glaciation

1842115
1842176
1842059
1842049
2020-12-15 Kim, Sora; Scher, Howard; Huber, Matthew; Jahn, Alexandra
CESM1.2 Ocean Model Output for Eocene Including Neodymium and Oxygen Isotopes
USAP-DC
Data from: Probing the ecology and climate of the Eocene Southern Ocean with sand tiger sharks Striatolamia macrota
Dryad
Air-Sea Fluxes of Momentum, Heat, and Carbon Dioxide at High Wind Speeds in the Southern Ocean

1043623
2020-10-09 Miller, Scott
Eddy covariance air-sea momentum, heat, and carbon dioxide fluxes in the Southern Ocean from the N.B. Palmer cruise NBP1402
USAP-DC
Eddy covariance air-sea momentum, heat, and carbon dioxide fluxes in the Southern Ocean from the N.B. Palmer cruise NBP1210
USAP-DC
Expedition Data
R2R
Expedition Data
R2R
Collaborative Research: Reconstructing Temperatures during the Mid-Pliocene Warm Period in the McMurdo Dry Valleys with Cosmogenic Noble Gases

1935907
1935755
1935945
2020-08-25 Tremblay, Marissa; Granger, Darryl; Balco, Gregory; Lamp, Jennifer No dataset link provided
Collaborative Research: Subglacial Antarctic Lakes Scientific Access (SALSA): Integrated Study of Carbon Cycling in Hydrologically-active Subglacial Environments

1543537
1543347
1543405
1543453
1543441
1543396
2020-07-16 Rosenheim, Brad; Fricker, Helen; Priscu, John; Leventer, Amy; Dore, John; Lyons, W. Berry; Christner, Brent
Bistatic Radar Sounding of Whillans Ice Stream, Antarctica and Store Glacier, Greenland
USAP-DC
Mercer Subglacial Lake (SLM) noble gas and isotopic data
USAP-DC
Salsa sediment cores
OSU-MGR
Antarctica - PI Continuous - GZ01-WIS_GroundingZone_01 P.S. - GPS/GNSS Observations Dataset
UNAVCO
Antarctica - PI Continuous - GZ13-WIS_GroundingZone_13 P.S. - GPS/GNSS Observations Dataset
UNAVCO
Antarctica - PI Continuous - LA02-WIS_LAKES_02 P.S. - GPS/GNSS Observations Dataset
UNAVCO
Antarctica - PI Continuous - LA06-WIS_LAKES_06 P.S. - GPS/GNSS Observations Dataset
UNAVCO
Mercer Subglacial Lake (SLM) microbial composition: 16S rRNA genes (Sequence Read Archive; BioProject: PRJNA790995)
NCBI GenBank
Antarctica - PI Continuous - LA07-WIS_LAKES_07 P.S. - GPS/GNSS Observations Dataset
UNAVCO
CTD data from Mercer Subglacial Lake and access borehole
USAP-DC
Antarctica - PI Continuous - LA09-WIS_LAKES_09 P.S. - GPS/GNSS Observations Dataset
UNAVCO
Discrete bulk sediment properties data from Mercer Subglacial Lake
USAP-DC
Mercer Subglacial Lake water column viral metagenomic sequencing
GenBank
Water column biogeochemical data from Mercer Subglacial Lake
USAP-DC
Sediment porewater properties data from Mercer Subglacial Lake
USAP-DC
Mercer Subglacial Lake radiocarbon and stable isotope data
USAP-DC
Isotopic data from Whillans Ice Stream grounding zone, West Antarctica
USAP-DC
Collaborative Research: Using Stable Isotopes to Constrain the Atmospheric Carbon Monoxide Budget over the Last 20,000 Years

1443482
2020-07-09 Mak, John
Carbon monoxide mixing ratios and stable isotopic values, SPICE
USAP-DC
Constraining Plio-Pleistocene West Antarctic Ice Sheet Behavior from the Ohio Range and Scott Glacier

1341658
2020-06-28 Mukhopadhyay, Sujoy
Ohio Range Subglacial rock core cosmogenic nuclide data
USAP-DC
Completing the WAIS Divide Ice Core CO2 record

1246465
2020-06-22 Brook, Edward J.
WAIS Divide Ice Core Marine Isotope Stage 3 CO2 record
USAP-DC
EAGER: Feasibility of Reconstructing the Atmospheric History of Molecular Hydrogen from Antarctic Ice

1907974
2020-06-09 Saltzman, Eric
H2 in South Pole firn air
USAP-DC
A High Resolution Atmospheric Methane Record from the South Pole Ice Core

1643722
2020-06-02 Brook, Edward J.
South Pole Ice Core Methane Data and Gas Age Time Scale
USAP-DC
South Pole ice core (SPC14) total air content (TAC)
USAP-DC
Understanding the Boundary Conditions of the Lake Vostok Environment: A Site Survey for Future Work

9978236
2020-04-24 Bell, Robin; Studinger, Michael S.
SOAR-Lake Vostok Survey Gravity data
USAP-DC
SOAR-Lake Vostok Survey surface elevation data
USAP-DC
SOAR-Lake Vostok Survey bed elevation data
USAP-DC
SOAR-Lake Vostok Survey airborne radar data
USAP-DC
SOAR-Lake Vostok Survey ice thickness data
USAP-DC
SOAR-Lake Vostok survey magnetic anomaly data
USAP-DC
Carbonyl Sulfide, Methyl Chloride, and Methyl Bromide Measurements in the New Intermediate-depth South Pole Ice Core

1443470
2020-03-26 Aydin, Murat
South Pole ice core (SPC14) discrete methane data
USAP-DC
SPC14 carbonyl sulfide, methyl chloride, and methyl bromide measurements from South Pole, Antarctica
USAP-DC
SP19 Gas Chronology
USAP-DC
Quantifying Atmospheric Iron Properties over West Antarctic Peninsula

1341494
2020-02-20 Gao, Yuan
Particle sizes of aerosol iron
USAP-DC
Concentrations and Particle Size Distributions of Aerosol Trace Elements
USAP-DC
Collaborative Research: Determining Magma Storage Depths and Ascent Rates for the Erebus Volcanic Province, Antarctica Using Diffusive Water Loss from Olivine-hosted Melt Inclusion

1644027
1644020
1644013
2020-02-08 Gaetani, Glenn; Le Roux, Veronique; Sims, Kenneth; Wallace, Paul
G170 Secondary Ion Mass Spectrometry Analyses of Melt Inclusion Hydrogen Isotopes
USAP-DC
G170 Electron Microprobe Analyses of Melt Inclusions and Host Olivines
USAP-DC
G170 Sample Locations Ross Island & Discovery Province
USAP-DC
Location and Description of Tephra Samples from the Erebus and Discovery Sub-provinces
USAP-DC
G170 Raman Spectroscopy & Tomography Volumes of Melt Inclusions and Vapor Bubbles
USAP-DC
G170 Secondary Ion Mass Spectrometry Analses of Melt Inclusion Volatiles
USAP-DC
Collaborative Research: Record of the Triple-oxygen Isotope and Hydrogen Isotope Composition of Ice from an Ice Core at South Pole

1443105
2019-11-17 Steig, Eric J.; White, James
South Pole Ice Core Holocene Major Ion Dataset
USAP-DC
Continuous-flow measurements of the complete water isotope ratios (D/H, 17O/16O, 18O/16) from the South Pole ice core
USAP-DC
South Pole high resolution ice core water stable isotope record for dD, d18O
USAP-DC
South Pole Ice Core Sea Salt and Major Ions
USAP-DC
Temperature, accumulation rate, and layer thinning from the South Pole ice core (SPC14)
USAP-DC
SP19 Gas Chronology
USAP-DC
Collaborative Research: A 1500m Ice Core from South Pole

1142646
1142517
1141839
2019-10-30 Twickler, Mark; Souney, Joseph Jr.; Aydin, Murat; Steig, Eric J.
South Pole Ice Core (SPICEcore) SPC14 Core Quality Versus Depth
USAP-DC
Temperature, accumulation rate, and layer thinning from the South Pole ice core (SPC14)
USAP-DC
South Pole ice core (SPC14) discrete methane data
USAP-DC
SP19 Gas Chronology
USAP-DC
South Pole Ice Core Holocene Major Ion Dataset
USAP-DC
South Pole Ice Core Sea Salt and Major Ions
USAP-DC
CAREER: Cross-Instrument Synthesis of Antarctic Radar Sounding Observations

1745137
2019-10-12 Schroeder, Dustin; MacKie, Emma
Antarctic topographic and subglacial lake geostatistical simulations
USAP-DC
Radar Sounding Observations of the Amundsen Sea Embayment, 2004-2005
USAP-DC
Collaborative Research: South Pole Ice Core Chronology and Climate Records using Chemical and Microparticle Measurements

1443397
1443663
1443336
2019-08-29 Osterberg, Erich
The South Pole Ice Core (SPICEcore) chronology and supporting data
USAP-DC
South Pole Ice Core Sea Salt and Major Ions
USAP-DC
SPICEcore 400-480 m Major Ions SDSU
USAP-DC
South Pole Ice Core Holocene Major Ion Dataset
USAP-DC
Preliminary SPC14 high-resolution Fe and Mn biologically relevant and dissolved trace metal concentrations spanning -42 – 54,300 years BP.
USAP-DC
South Pole (SPC14) microparticle concentration, mass concentration, flux, particle-size-distribution mode, and aspect ratio measurements
USAP-DC
South Pole ice core (SPC14) discrete methane data
USAP-DC
Collaborative Research: Investigating Holocene Shifts in the Diets and Paleohistory of Antarctic Krill Predators

1443424
1826712
1443585
1443386
2019-08-08 Polito, Michael; Kelton, McMahon; Patterson, William; McCarthy, Matthew
Radioisotope dates and carbon (δ13C) and nitrogen (δ15N) stable isotope values from modern and mummified Adélie Penguin chick carcasses and tissue from the Ross Sea, Antarctica
USAP-DC
Carbon and nitrogen stable isotope values of Antarctic Krill from the South Shetland Islands and the northern Antarctic Peninsula 2007 and 2009
USAP-DC
SNP data from "Receding ice drove parallel expansions in Southern Ocean penguins".
Figshare
The rise and fall of an ancient Adelie penguin 'supercolony' at Cape Adare, Antarctica
USAP-DC
Stable isotopes of Adelie Penguin chick bone collagen
USAP-DC
Receding ice drove parallel expansions in Southern Ocean penguin
NCBI BioProject
Radiocarbon dates from pygoscelid penguin tissues excavated at Stranger Point, King George Island, Antarctic Peninsula
USAP-DC
Amino acid nitrogen isotope values of modern and ancient Adélie penguin eggshells from the Ross Sea and Antarctic Peninsula regions
USAP-DC
Radiocarbon dating and stable isotope values of penguin and seal tissues recovered from ornithogenic soils on Platter Island, Danger Islands Archipelago, Antarctic Peninsula in December 2015.
USAP-DC
Ancient Adelie penguin colony revealed by snowmelt at Cape Irizar, Ross Sea, Antarctica
USAP-DC
Radiometric dating, geochemical proxies, and predator biological remains obtained from aquatic sediment cores on South Georgia Island.
USAP-DC
Stable isotope analysis of multiple tissues from chick carcasses of three pygoscelid penguins in Antarctica
USAP-DC
Amino acid nitrogen isotope values of penguins from the Antarctic Peninsula region 1930s to 2010s
USAP-DC
Controls on Variations in Atmospheric Carbon Dioxide and Nitrous Oxide During the Last 10,000 years

1443550
2019-08-06 Brook, Edward J.
Polar Ice Cores 3,000 Year Nitrous Oxide d15N and d18O Data
NCEI
SPICEcore Holocene CO2 and N2O data
USAP-DC
Collaborative research: Kr-86 as a proxy for barometric pressure variability and movement of the SH westerlies during the last deglaciation

1543267
1543229
2019-07-10 Severinghaus, Jeffrey P.; Brook, Edward J.
Multi-site ice core Krypton stable isotope ratios
USAP-DC
Noble Gas Data from recent ice in Antarctica for 86Kr problem
USAP-DC
Multi-site ice core Krypton stable isotope ratios
USAP-DC
Multi-site ice core Krypton stable isotope ratios
USAP-DC
Collaborative Research: Seasonal Sea Ice Production in the Ross Sea, Antarctica

1341513
1341717
1341725
1543483
1341606
2019-06-10 Ackley, Stephen; Bell, Robin; Weissling, Blake; Nuss, Wendell; Maksym, Edward; Stammerjohn, Sharon; Cassano, John; Guest, Peter; Sedwick, Peter; Xie, Hongjie
PIPERS Noble Gases
USAP-DC
Impact of Convective Processes and Sea Ice Formation on the Distribution of Iron in the Ross Sea: Closing the Seasonal Cycle
BCO-DMO
NBP1704 CTD sensor data
USAP-DC
Expedition data of NBP1704
R2R
NBP1704 Expedition Data
R2R
ASPeCt Visual Ice Observations on PIPERS Cruise NBP1704 April-June 2017
USAP-DC
PIPERS Meteorology Time Series
USAP-DC
PIPERS Meteorology Rawinsonde Data
USAP-DC
PIPERS Airborne LiDAR Data
USAP-DC
SUMO unmanned aerial system (UAS) atmospheric data
USAP-DC
Sea Ice Layer Cakes, PIPERS 2017
USAP-DC
EAGER: Elucidating the Antarctic Methane Cycle at the Cinder Cones Reducing Habitat.

1642570
2019-05-24 Thurber, Andrew
Microbial community composition of the Cinder Cones Cold Seep
BCO-DMO
Collaborative Research: The Chemical Ecology of Shallow-water Marine Macroalgae and Invertebrates on the Antarctic Peninsula - continuing

1341339
1341333
2019-03-05 Amsler, Charles; Baker, Bill; McClintock, James
Data from Amsler et al. 2019 Antarctic Science
USAP-DC
Plocamium transect and transplant data
USAP-DC
Plocamium reproductive system data and R code
USAP-DC
The Chemical Ecology of Shallow-water Marine Macroalgae and Invertebrates on the Antarctic Peninsula - 2011 Clad Outplant
USAP-DC
Supplementary information provided with Murray et al.: Discovery of an Antarctic ascidian-associated uncultivated Verrucomicrobia with antimelanoma palmerolide biosynthetic potential
Dryad
The Chemical Ecology of Shallow-water Marine Macroalgae and Invertebrates on the Antarctic Peninsula - 2010 experimental data
USAP-DC
Raw gastropod collection data from Amsler et al. 2022 Antarctic Science
USAP-DC
The Chemical Ecology of Shallow-water Marine Macroalgae and Invertebrates on the Antarctic Peninsula - 2013 Chemo Phylo data
USAP-DC
Plocamium cartilagineum field chemotyping
USAP-DC
Synoicum adareanum sampling underwater video Mar 2011 Palmer Station Antarctica
Dryad
The Chemical Ecology of Shallow-water Marine Macroalgae and Invertebrates on the Antarctic Peninsula - 2010 field data
USAP-DC
Collaborative Research: Assessing the Global Climate Response to Melting of the Antarctic Ice Sheet

1443394
1443347
2019-02-04 Pollard, David; Condron, Alan; DeConto, Robert
Simulated changes in Southern Ocean salinity
USAP-DC
Future climate response to Antarctic Ice Sheet melt caused by anthropogenic warming
USAP-DC
Antarctic Ice Sheet simulations for role of freshwater in future warming scenarios
USAP-DC
Collaborative Research: Inert Gas and Methane Based Climate Records throughout the South Pole Deep Ice Core

1443472
1443464
1443710
2019-02-02 Severinghaus, Jeffrey P.; Sowers, Todd A.; Brook, Edward J.
South Pole Ice Core Isotopes of N2 and Ar
USAP-DC
SP19 Gas Chronology
USAP-DC
South Pole ice core (SPC14) discrete methane data
USAP-DC
South Pole (SPICECORE) 15N, 18O, O2/N2 and Ar/N2
USAP-DC
South Pole ice core total air content
USAP-DC
South Pole CH4 data for termination
USAP-DC
Collaborative Research: Body Size, Oxygen, and Vulnerability to Climate Change in Antarctic Pycnogonida

1341476
2018-12-10 Moran, Amy; Woods, H. Arthur
Physiological, biomechanical, and locomotory data on Antarctic sea spiders fouled and unfouled with epibionts
USAP-DC
Size scaling of oxygen physiology and metabolic rate of Antarctic sea spiders
USAP-DC
Physiological and biochemical measurements on Pycnogonida from McMurdo Sound
USAP-DC
Cuticle morphology and oxygen gradients of Antarctic sea spiders
USAP-DC
Ethane Measurements in the Intermediate Depth South Pole Ice Core (SPICECORE)

1644245
2018-11-13 Aydin, Murat
Ice core ethane measurements, Greenland and Antarctica, 1000-1900 CE.
Arctic Data Center
Ice Core Air Ethane and Acetylene Measurements - South Pole SPC14 Ice Core (SPICEcore project)
USAP-DC
Collaborative Research: Window into the World with 40,000-year Glacial Cycles from Climate Records in Million Year-old Ice from the Allan Hills Blue Ice Area

1443306
1443263
2018-10-18 Mayewski, Paul A.; Kurbatov, Andrei V.; Higgins, John; Bender, Michael
Methane concentration in Allan Hills ice cores
USAP-DC
Stable water isotope data for the AH-1502 ice core drilled at the Allan Hills Blue ice area
USAP-DC
Allan Hills ice water stable isotope record for dD, d18O
USAP-DC
Stable water isotope data for the surface samples collected at the Allan Hills Blue ice area
USAP-DC
Greenhouse gas composition in the Allan Hills S27 ice core
USAP-DC
Elemental and isotopic composition of heavy noble gases in Allan Hills ice cores
USAP-DC
Carbon dioxide concentration and its stable carbon isotope composition in Allan Hills ice cores
USAP-DC
Allan Hills ice water stable isotope record for dD, d18O
USAP-DC
Stable isotope composition of the trapped air in the Allan Hills S27 ice core
USAP-DC
Elemental and isotopic composition of nitrogen, oxygen, and argon in Allan Hills ice cores
USAP-DC
Stable water isotope data for the AH-1503 ice core drilled at the Allan Hills Blue ice area
USAP-DC
Impact of Supraglacial Lakes on Ice-Shelf Stability

1443126
2018-07-24 MacAyeal, Douglas
McMurdo Ice Shelf AWS data
USAP-DC
McMurdo Ice Shelf GPS survey of vertical motion
USAP-DC
Supraglacial Lake Depths on McMurdo Ice Shelf, Antarctica
USAP-DC
Time-lapse video of McMurdo Ice Shelf surface melting and hydrology
USAP-DC
Collaborative Research: Bipolar Coupling of late Quaternary Ice Sheet Variability

1341311
2018-06-26 Timmermann, Axel
784 ka transient Antarctic ice-sheet model simulation data
IBS Center for Climate Physics ICCP
Collaborative Research: Characterization of Upstream Ice and Firn Dynamics affecting the South Pole Ice Core

1443471
1443341
2018-06-14 Koutnik, Michelle; Conway, Howard; Waddington, Edwin D.; Fudge, T. J.; Hawley, Robert L.; Osterberg, Erich
SPICEcore Advection
USAP-DC
Firn density and compaction rates 50km upstream of South Pole
USAP-DC
7MHz radar in the vicinity of South Pole
USAP-DC
Shallow radar near South Pole
USAP-DC
Firn temperatures 50km upstream of South Pole
USAP-DC
South Pole area GPS velocities
USAP-DC
Using Electrical Conductance Measurements to Develop the South Pole Ice Core Chronology

1443232
2018-05-08 Fudge, T. J.; Waddington, Edwin D.
AC-ECM for SPICEcore
USAP-DC
ECM (DC and AC) multi-track data and images from 2016 processing season
USAP-DC
Collaborative Research: Deglaciation of the Ross Sea Embayment - constraints from Roosevelt Island

0944021
0944307
0943466
2018-02-16 Conway, Howard; Brook, Edward J.; Hawley, Robert L.
Roosevelt Island Borehole Firn temperatures
USAP-DC
Roosevelt Island Borehole Optical Televiewer logs
USAP-DC
Roosevelt Island: Radar and GPS
USAP-DC
Roosevelt Island Ice Core Time Scale and Associated Data
USAP-DC
You are what you eat: The Role of Kleptoplasty in an Antarctic Dinoflagellate

1341362
2018-02-12 Gast, Rebecca
Dinoflagellate sequende data
NCBI GenBank
Antarctic Cloud Physics: Fundamental Observations from Ross Island

1141939
2017-12-20 Lubin, Dan
Shortwave Spectroradiometer Data from Ross Island, Antarctica
USAP-DC
Climate History and Flow Processes from Physical Analyses of the SPICECORE South Pole Ice Core

1542778
2017-09-29 Alley, Richard; Fegyveresi, John; Voigt, Donald E.
South Pole Ice Core (SPC14) Bubble Number-Density Data
USAP-DC
South Pole Ice Core (SPIcecore) Visual Observations
USAP-DC
c-Axis Fabric of the South Pole Ice Core, SPC14
USAP-DC
Collaborative Research: Climate, Ice Dynamics and Biology using a Deep Ice Core from the West Antarctic Ice Sheet Ice Divide

0944348
0944266
2017-06-09 Mark, Twickler; Taylor, Kendrick C.
WAIS Divide WDC06A Core Quality Versus Depth
USAP-DC
Summary of Results from the WAIS Divide Ice Core Project
USAP-DC
Collaborative Research: Allan HILLs Englacial Site (AHILLES) Selection

1443260
2017-05-02 Conway, Howard
Ground-based ice-penetrating radar profiles collected on the Allan Hills blue ice region
USAP-DC
2015-2016 GPR Field Report for Allan Hills Shallow Ice Coring
USAP-DC
Trace and Ultra-Trace Chemistry Measurements of the WAIS Divide Ice Core

0538427
2017-04-25 Bender, Michael; McConnell, Joseph
WAIS Divide Ice-Core Aerosol Records from 1.5 to 577 m
USAP-DC
WAIS Divide Ice-Core Aerosol Records from Intermediate Core WDC05A
USAP-DC
WAIS Divide Ice-Core Aerosol Records from Intermediate Core WDC05Q
USAP-DC
WAIS Divide Ice-Core Chronology from Intermediate Core WDC05A
USAP-DC
WAIS Divide Ice-Core Chronology from Intermediate Core WDC05Q
USAP-DC
Gas measurement from Higgins et al., 2015 - PNAS
USAP-DC
Collaborative Research: Establishing the Chronology and Histories of Accumulation and Ice Dynamics for the WAIS Divide Core

0944191
0944197
2017-04-25 Conway, Howard; Fudge, T. J.; Taylor, Kendrick C.; Waddington, Edwin D.
Accumulation Rates from the WAIS Divide Ice Core
USAP-DC
WAIS Divide Multi Track Electrical Measurements
USAP-DC
WAIS Divide Ice Core Electrical Conductance Measurements, Antarctica
USAP-DC
WD2014: Timescale for WAIS Divide Core 2006 A (WDC-06A)
USAP-DC
Collaborative Research: Investigating Upper Pleistocene Rapid Climate Change using Continuous, Ultra-High-Resolution Aerosol and Gas Measurements in the WAIS Divide Ice Core

1142166
2017-04-25 McConnell, Joseph
WAIS Divide Ice-Core Aerosol Records from 1300 to 3404 m
USAP-DC
Developing a New Paleoclimate Proxy for Polar and Alpine Glacial Regions Based on Noble Gases

1245580
2017-01-30 Castro, M. Clara; Doran, Peter; Kenig, Fabien
Developing a New Paleoclimate Proxy for Polar and Alpine Glacial Regions Based on Noble Gases
USAP-DC
Collaborative Research: Physical Properties of the WAIS Divide Deep Core

0539232
0539578
2017-01-12 Fitzpatrick, Joan; Alley, Richard; Fegyveresi, John; Clow, Gary D.; Cuffey, Kurt M.; Cravens, Eric D.
Updated (2017) bubble number-density, size, shape, and modeled paleoclimate data
USAP-DC
WDC 06A Mean Grain Size Data
USAP-DC
Grain Size Full Population Dataset from WDC06A Core
USAP-DC
WAIS Divide Surface and Snow-pit Data, 2009-2013
USAP-DC
WAIS Divide Ice Core Vertical Thin Section Low-resolution Digital Imagery
USAP-DC
Temperature Profile of the West Antarctic Ice Sheet Divide Deep Borehole
USAP-DC
Temperature Reconstruction at the West Antarctic Ice Sheet Divide
USAP-DC
Collaborative Research: A "Horizontal Ice Core" for Large-Volume Samples of the Past Atmosphere, Taylor Glacier, Antarctica

0838936
0839031
2016-03-29 Brook, Edward J.; Severinghaus, Jeffrey P.
Taylor Glacier CO2 record
NCEI
Measurements of in situ cosmogenic 14C from Taylor Glacier, Antarctica
USAP-DC
Measurements of 14C-methane for the Younger Dryas - Preboreal Transition from Taylor Glacier, Antarctica
USAP-DC
Taylor Glacier Gas Isotope Data
USAP-DC
Taylor Glacier chemistry data and Taylor Dome TD2015 time scale
USAP-DC
Bromide in Snow in the Sea Ice Zone

1043145
2016-03-01 Obbard, Rachel
Bromide in Snow in the Sea Ice Zone
USAP-DC
Collaborative Research: Completing an ultra-high resolution methane record from the WAIS Divide ice core

1043518
2016-01-12 Rhodes, Rachel; Brook, Edward J.; McConnell, Joseph
Continuous, Ultra-high Resolution WAIS-Divide Ice Core Methane Record 9.8-67.2 ka BP
USAP-DC
Early Holocene methane records from Siple Dome, Antarctica
USAP-DC
Early Holocene methane records from Siple Dome, Antarctica
USAP-DC
Methan record
NCEI
Collaborative Research: Ecophysiology of DMSP and related compounds and their contributions to carbon and sulfur dynamics in Phaeocystis antarctica

0944659
0944686
2015-12-16 Kiene, Ronald; Kieber, David John
Ecophysiology of DMSP and related compounds and their contributions to carbon and sulfur dynamics in Phaeocystis antarctica
USAP-DC
Ecophysiology of DMSP and related compounds and their contributions to carbon and sulfur dynamics in Phaeocystis antarctica
USAP-DC
Geophysical Investigations of Marie Byrd Land Lithospheric Evolution (GIMBLE)

1043761
2015-12-01 Young, Duncan A.; Holt, John W.; Blankenship, Donald D.
AGASEA 4.7 ka Englacial Isochron over the Thwaites Glacier Catchment
USAP-DC
Gravity disturbance data over central Marie Byrd Land, West Antarctica (GIMBLE.GGCMG2)
USAP-DC
Magnetic anomaly data over central Marie Byrd Land, West Antarctica (GIMBLE.GMGEO2)
USAP-DC
Ice thickness and related data over central Marie Byrd Land, West Antarctica (GIMBLE.GR2HI2)
USAP-DC
Geophysical Investigations of Marie Byrd Land Lithospheric Evolution (GIMBLE) Airborne VHF Radar Transects: 2012/2013 and 2014/2015
Texas Data Repository
Carbonyl Sulfide Measurements in the Deep West Antarctic Ice Sheet Divide Ice Core

1043780
2015-10-27 Aydin, Murat; Saltzman, Eric
Ultra-trace Measurements in the WAIS Divide 06A Ice Core
USAP-DC
Ice Core Air Carbonyl Sulfide Measurements - Taylor Dome M3C1 Ice Core
USAP-DC
Collaborative Research: Replicate Coring at WAIS Divide to Obtain Additional Samples at Events of High Scientific Interest

1043522
1043421
2015-07-13 Severinghaus, Jeffrey P.; Brook, Edward J.
WAIS Divide Replicate Core Methane Isotopic Data Set
USAP-DC
Fugitive Gases (Helium, Neon, and Oxygen) in the WAIS Divide Ice Core as Tracers of Basal Processes and Past Biospheric Carbon Storage

1143619
2015-07-13 Severinghaus, Jeffrey P. No dataset link provided
Collaborative Research: The Taylor Glacier, Antarctica, Horizontal Ice Core: Exploring changes in the Natural Methane Budget in a Warming World and Expanding the Paleo-archive

1246148
1245821
1245659
2015-07-13 Petrenko, Vasilii; Brook, Edward J.; Severinghaus, Jeffrey P.; PETRENKO, VASILLI
N2O Concentration and Isotope Data for 74-59 ka from Taylor Glacier, Antarctica
USAP-DC
Taylor Glacier CO2 Isotope Data 74-59 kyr
USAP-DC
Last Interglacial Mean Ocean Temperature
USAP-DC
Mean Ocean Temperature in Marine Isotope Stage 4
USAP-DC
The Taylor Glacier, Antarctica, Horizontal Ice Core: Exploring changes in the Natural Methane Budget in a Warming World and Expanding the Paleo-archive
USAP-DC
Last Interglacial Mean Ocean Temperature
USAP-DC
Measurements of 14CH4 and 14CO in ice from Taylor Glacier: Last Deglaciation
USAP-DC
Taylor Glacier Noble Gases - Younger Dryas
USAP-DC
Gas and Dust Measurements for Taylor Glacier and Taylor Dome Ice Cores
USAP-DC
Cape Adare Long Term Moorings (CALM): Analysis Phase

1141890
2015-06-17 Huber, Bruce; Vernet, Maria
Processed CTD Data from the Larsen Ice Shelf near Antarctica acquired during the Nathaniel B. Palmer expedition NBP1203
USAP-DC
Expedition Data of NBP1203
R2R
Processed ship-based LADCP Sonar Data from the Larsen Ice Shelf near Antarctica acquired during the Nathaniel B. Palmer expedition NBP1203
USAP-DC
The effects of ocean acidification and rising sea surface temperatures on shallow-water benthic organisms in Antarctica

1041022
2015-05-22 Angus, Robert; Amsler, Charles; McClintock, James
Response time data for snails escaping from predatory sea stars
USAP-DC
The effects of ocean acidification and rising sea surface temperatures on shallow-water benthic organisms in Antarctica
USAP-DC
Data from Schram et al. 2017 MEPS
USAP-DC
Antarctic Peninsula Exhumation and Landscape Development Investigated by Low-temperature Detrital Thermochronometry

1246484
2015-03-02 Shuster, David; Balco, Gregory
Data repositories for UC-Berkeley/BGC thermochronometry and thermochronology research
PI website
Collaborative Research: Exploring A 2 Million + Year Ice Climate Archive-Allan Hills Blue Ice Area (2MBIA)

0838849
0838843
2014-12-10 Spaulding, Nicole; Introne, Douglas; Bender, Michael; Kurbatov, Andrei V.; Mayewski, Paul A.
Exploring A 2 Million + Year Ice Climate Archive-Allan Hills Blue Ice Area (2MBIA)
USAP-DC
Allan Hills Stable Water Isotopes
USAP-DC
Collaborative Research: EAGER: Evaluating the Larsen basin's suitability for testing the Cretaceous Glaciation Hypothesis

1241460
1241574
2014-12-03 Barbeau, David; Hemming, Sidney R.; Barbeau, David Jr No dataset link provided
Firn Metamorphism: Microstructure and Physical Properties

0944078
2014-08-15 Baker, Ian; Albert, Mary R.
Firn Permeability and Density at WAIS Divide
USAP-DC
Noble Gases in the WAIS Divide Ice Core as Indicators of Local and Mean-ocean Temperature

0944343
2014-08-15 Severinghaus, Jeffrey P. No dataset link provided
Collaborative Research: Integrated High Resolution Chemical and Biological Measurements on the Deep WAIS Divide Core

0839122
0839075
0839093
2014-05-30 Foreman, Christine; Skidmore, Mark; Saltzman, Eric; McConnell, Joseph; Priscu, John
Prokaryotic cell concentration record from the WAIS Divide ice core
USAP-DC
Ice Core Air Carbonyl Sulfide Measurements - Taylor Dome M3C1 Ice Core
USAP-DC
Fluorescence spectroscopy data from the West Antarctic Ice Sheet (WAIS) Divide ice core, WDC06A
USAP-DC
Holocene Black Carbon in Antarctica
USAP-DC
Major Ion Chemical Analysis of Brittle Ice in the WAIS Divide Ice Core

0839066
2014-03-19 Cole-Dai, Jihong
Major Ion Chemistry Data of WAIS Divide Ice Core Brittle Ice
USAP-DC
Ammonia Oxidation Versus Heterotrophy in Crenarchaeota Populations from Marine Environments West of the Antarctic Peninsula

0838996
2014-03-13 Hollibaugh, James T.
Expedition data of LMG1006
R2R
Ammonia Oxidation Versus Heterotrophy in Crenarchaeota Populations from Marine Environments West of the Antarctic Peninsula
USAP-DC
Collaborative Research: Seasonal Evolution of Chemical and Biological Variability in the Ross Sea

0838948
2013-11-14 Hofmann, Eileen; Dinniman, Michael; Klinck, John M. No dataset link provided
Detangling Flow Regimes and Paleoclimate in the Deepest Section of the EDML Ice Core using U-series Ages.

1043367
2013-11-01 Aciego, Sarah No dataset link provided
Collaborative Research: Alternative Nutritional Strategies in Antarctic Protists

0838955
2013-10-30 Gast, Rebecca
Alternative Nutritional Strategies in Antarctic Protists
USAP-DC
Mount Erebus Volcano Observatory: Operations, Science and Outreach (MEVO-OSO)

1142083
2013-09-03 Kyle, Philip; Oppenheimer, Clive; Chaput, Julien; Jones, Laura; Fischer, Tobias
Database of Erebus cave field seasons
GitHub
Seismic data used for high-resolution active-source seismic tomography
IRIS
Icequakes at Erebus volcano, Antarctica
IRIS
Mount Erebus Seismic Data
IRIS
Mount Erebus Thermodynamic model code
GitHub
Mount Erebus Volcano Observatory: Operations, Science and Outreach (MEVO-OSO)
USAP-DC
Mount Erebus Observatory GPS data
UNAVCO
Atmospheric CO2 and Abrupt Climate Change

0944764
2013-08-08 Ahn, Jinho; Brook, Edward J.
Abrupt Change in Atmospheric CO2 During the Last Ice Age
USAP-DC
High-resolution Atmospheric CO2 during 7.4-9.0 ka
USAP-DC
Abrupt Change in Atmospheric CO2 During the Last Ice Age
USAP-DC
Abrupt Change in Atmospheric CO2 During the Last Ice Age
USAP-DC
Ocean Surfaces on Snowball Earth

0739779
1142963
2013-07-10 Warren, Stephen; Light, Bonnie; Campbell, Adam; Carns, Regina; Dadic, Ruzica; Mullen, Peter; Brandt, Richard; Waddington, Edwin D.
Ice on the Oceans of Snowball Earth Project Data
PI website
Advanced Microstructural Characterization of Polar Ice Cores

0738975
2012-11-26 Baker, Ian; Obbard, Rachel; Sieg, Katherine
Siple Dome A (SDMA) Grain Orientation 640 - 790 Meters
USAP-DC
Climatology, Meteorology, and Microbial Metabolism in Ice with Dust Loggers and Fluorimetry

0738658
2012-06-19 Bay, Ryan; Price, Buford; Souney, Joseph Jr.
data from one of three optical logs we made at WAIS Divide
USAP-DC
Access to data
PI website
WAIS Divide Laser Dust Logger Data
USAP-DC
Collaborative Research: Microparticle/tephra analysis of the WAIS Divide ice core

0636740
0636767
2012-06-19 Koffman, Bess; Kreutz, Karl; Breton, Daniel; Dunbar, Nelia; Hamilton, Gordon S.
WAIS Divide WDC06A Discrete ICP-MS Chemistry
USAP-DC
Snowpit evidence of the 2011 Puyehue-Cordon Caulle (Chile) eruption in West Antarctica
USAP-DC
WAIS Divide Microparticle Concentration and Size Distribution, 0-2400 ka
USAP-DC
WAIS Divide Snowpit Chemical and Isotope Measurements, Antarctica
USAP-DC
Snowpit Chemistry - Methods Comparison, WAIS Divide, Antarctica
USAP-DC
Microparticle, Conductivity, and Density Measurements from the WAIS Divide Deep Ice Core, Antarctica
USAP-DC
Atmospheric Carbon Dioxide and Climate Change: The WAIS Divide Ice Core Record

0739766
2012-05-30 Marcott, Shaun; Ahn, Jinho; Brook, Edward J.
WAIS Divide Ice Core CO2
USAP-DC
Collaborative Research: Synthesis of Thwaites Glacier Dynamics: Diagnostic and Prognostic Sensitivity Studies of a West Antarctic Outlet System

0636724
0758274
2012-05-15 Carter, Sasha P.; Dupont, Todd K.; Holt, John W.; Morse, David L.; Parizek, Byron R.; Young, Duncan A.; Kempf, Scott D.; Blankenship, Donald D.
Subglacial water flow paths under Thwaites Glacier, West Antarctica
USAP-DC
AGASEA Ice Thickness Profile Data from the Amundsen Sea Embayment, Antarctica
USAP-DC
AGASEA 4.7 ka Englacial Isochron over the Thwaites Glacier Catchment
USAP-DC
Synthesis of Thwaites Glacier Dynamics: Diagnostic and Prognostic Sensitivity Studies of a West Antarctic Outlet System
USAP-DC
Access to data
NASA
ICECAP Basal Interface Specularity Content Profiles: IPY and OIB
USAP-DC
Access to data
NSIDC
Airborne Laser Altimetry of the Thwaites Glacier Catchment, West Antarctica
USAP-DC
Collaborative Research: Constructing an Ultra-high Resolution Atmospheric Methane Record for the Last 140,000 Years from WAIS Divide Core.

0538578
0538538
2012-04-19 Lee, James; Buizert, Christo; Brook, Edward J.; Mitchell, Logan E; Sowers, Todd A.
The Antarctic Glaciological Data Center (AGDC) at the National Snow and Ice Data Center (NSIDC) archives and distributes Antarctic glaciological and cryospheric system data collected by the U.S. Antarctic Program.
NSIDC
Methane Concentrations from the WAIS Divide Ice Core (WDC06A), 60 to 11,300 ybp
USAP-DC
Late Holocene Methane Concentrations from WAIS Divide and GISP2
USAP-DC
Borehole Fingerprinting: Vertical Strain, Firn Compaction, and Firn Depth-Age Scales

0087521
2012-04-15 Alley, Richard; Taylor, Kendrick C.; Waddington, Edwin D.; Hawley, Robert L.
Annual Layers at Siple Dome, Antarctica, from Borehole Optical Stratigraphy
USAP-DC
Self-consistent Ice Dynamics, Accumulation, Delta-age, and Interpolation of Sparse Age Data using an Inverse Approach

0636997
2012-03-20 Carns, Regina; Hay, Mike; Waddington, Edwin D. No dataset link provided
Tracing Glacial-interglacial Changes in the Dust Source to Antarctica using Helium Isotopes

0636898
2011-11-30 Winckler, Gisela No dataset link provided
Collaborative Research: Methane Isotopes, Hydrocarbons, and other Trace Gases in South Pole Firn Air

0739598
0739491
2011-08-18 Aydin, Murat; Saltzman, Eric; Sowers, Todd A.
Alkanes in Firn Air Samples, Antarctica and Greenland
USAP-DC
Methane Isotopes in South Pole Firn Air, 2008
USAP-DC
Atmospheric, Snow and Firn Chemistry Studies for Interpretation of WAIS-Divide Cores

0636929
2011-07-14 Bales, Roger
Measurements of Air and Snow Photochemical Species at WAIS Divide, Antarctica
USAP-DC
LGM and Deglacial Radiocarbon from U-series Dated Drake Passage Deep-sea Corals

0902957
2011-06-28 Robinson, Laura
LGM and Deglacial Radiocarbon from U-series Dated Drake Passage Deep-sea Corals
USAP-DC
WAIS DIVIDE - High Temporal Resolution Black Carbon Record of Southern Hemisphere Biomass Burning

0739780
2011-04-28 Brook, Edward J.; McConnell, Joseph; Mitchell, Logan E; Sowers, Todd A.; Taylor, Kendrick C.
WAIS DIVIDE - High Temporal Resolution Black Carbon Record of Southern Hemisphere Biomass Burning
USAP-DC
Collaborative Research: Controls on climate-active gases by Amundsen Sea ice biota

0836112
0836144
0836061
2011-04-24 Smith, Walker; Yager, Patricia; Dennett, Mark
Controls on Climate-Active Gases by Amundsen Sea Ice Biota
USAP-DC
Amundsen Sea Polynya International Research Expedition (ASPIRE) data
BCO-DMO
Controls on Climate-Active Gases by Amundsen Sea Ice Biota
USAP-DC
Nitrogen and Oxygen Gas Isotopes in the WAIS Divide Ice Core as Constraints on Chronology, Temperature, and Accumulation Rate

0538657
2010-07-08 Haines, Skylar; Mayewski, Paul A.; Orsi, Anais J.; Kurbatov, Andrei V.; Severinghaus, Jeffrey P.
Borehole Temperature Measurement in WDC05A in January 2008 and January 2009
USAP-DC
d15N and d18O of air in the WAIS Divide ice core
USAP-DC
Ultra-High Resolution LA-ICP-MS Results: DO-21 Rapid Warming Event
USAP-DC
Low-res d15N and d18O of O2 in the WAIS Divide 06A Deep Core
USAP-DC
WAIS Divide d18Oatm and Siple Dome/WAIS Divide composite and individual delta epsilon LAND
USAP-DC
Global Climate Change and the Evolutionary Ecology of Antarctic Mollusks in the Late Eocene

9908828
2010-05-04 Aronson, Richard; Domack, Eugene Walter
Expedition data of NBP0107
R2R
Expedition Data
R2R
The Role of Snow in Antarctic Sea Ice Development and Ocean-Atmosphere Energy Exchange

9316767
2010-05-04 Jeffries, Martin
Expedition Data
R2R
Expedition Data
R2R
Collaborative Research: Processes Driving Spatial and Temporal Variability of Surface pCO2 in the Drake Passage

0338248
2010-05-04 Takahashi, Taro
Expedition Data
R2R
Glacial Radiocarbon Constraints from Drake Passage Deep-Sea Corals

0636787
2010-05-04 Dalziel, Ian W.
Expedition Data
R2R
Deep Ocean Ventilation Through Antarctic Intermediate Layers (DOVETAIL)

9528807
2010-05-04 Gordon, Arnold
Expedition Data
R2R
Global Climate Change and the Evolutionary Ecology of Antarctic Mollusks in the Late Eocene.

9908856
2010-05-04 Blake, Daniel
Expedition Data
R2R
Expedition data of LMG0309
R2R
Investigation of Climate, Ice Dynamics and Biology using a Deep Ice Core from the West Antarctic Ice Sheet Ice Divide

0440817
2010-02-10 McGwire, Kenneth C.
WAIS Divide Ice Core Images, Antarctica
USAP-DC
Collaborative Research: New insights into the Holocene methane budget from dual isotope systematics and a high resolution record of the interpolar gradient

0520523
2009-12-09 Brook, Edward J.
Methane Measurements from the GISP2 and Siple Dome Ice Cores
USAP-DC
Stable Isotope Studies at West Antarctic ITASE Sites

0196105
2009-10-01 Steig, Eric J.
US ITASE Stable Isotope Data, Antarctica
USAP-DC
Nitrogen and oxygen gas isotopes in the Siple Dome and Byrd ice cores

0440975
2009-07-17 Severinghaus, Jeffrey P.
Nitrogen and Oxygen Gas Isotopes in the Siple Dome and Byrd Ice Cores, Antarctica
USAP-DC
Hydrogen Peroxide, Formaldehyde, and Sub-Annual Snow Accumulation in West Antarctica: Participation in West Antarctic Traverse

9814810
2009-06-01 Bales, Roger; Frey, Markus; McConnell, Joseph
Twenty-Three Century-scale Ice Core Records of Hydrogen Peroxide (H2O2) from West Antarctica
USAP-DC
Atmospheric Mixing Ratios of Hydroperoxides above the West Antarctic Ice Sheet
USAP-DC
Collaborative Research: Gases in Firn Air and Shallow Ice at the Proposed WAIS Divide Drilling Site

0440701
0440498
0440615
0440509
0440759
0440602
2009-02-03 Battle, Mark; Mischler, John; Saltzman, Eric; Aydin, Murat; White, James; Brook, Edward J.; Orsi, Anais J.; Severinghaus, Jeffrey P.; Sowers, Todd A.
WAIS ice core Methane Data, Carbon Dioxide Data
USAP-DC
Surface Temperature Reconstruction from Borehole Temperature Measurement in WDC05A
USAP-DC
Ice Core Air Carbonyl Sulfide Measurements - SPRESSO Ice Core
USAP-DC
Methane Isotopes from the WAIS Divide Ice Core
USAP-DC
Gases in Firn Air and Shallow Ice at the WAIS Drilling Site, Antarctica
USAP-DC
High Resolution Records of Atmospheric Methane in Ice Cores and Implications for Late Quaternary Climate Change

0512971
0126057
2008-12-16 Blunier, Thomas; Chappellaz, Jerome; Stauffer, Bernhard; Kurz, Mark D.; Brook, Edward J.
Siple Dome Methane Record
USAP-DC
GISP2 (D Core) Helium Isotopes from Interplanetary Dust
USAP-DC
GISP2 (D Core) Methane Concentration Data
USAP-DC
Antarctic and Greenland Climate Change Comparison
USAP-DC
GISP2 (B and D Core) Methane Concentrations
USAP-DC
Distribution And Ecology Of Ammonia Oxidizing Bacteria In The Palmer LTER Study Area

0234249
2008-12-01 Hollibaugh, James T.
Ammonia Oxidizing Bacteria and Archaea Abundance
LTER
Methyl Chloride, Methyl Bromide, and Carbonyl Sulfide in Deep Antarctic Ice Cores

0636953
2008-10-22 Saltzman, Eric; Aydin, Murat; Williams, Margaret
Methyl Chloride Measurements from the Siple Dome A Deep Core, Antarctica
USAP-DC
Ice Core Air Carbonyl Sulfide Measurements - Taylor Dome M3C1 Ice Core
USAP-DC
Carbonyl Sulfide Measurements in the Taylor Dome M3C1 Ice Core
USAP-DC
Methyl Chloride Measurements in the Taylor Dome M3C1 Ice Core
USAP-DC
Methyl Bromide Measurements in the Taylor Dome M3C1 Ice Core
USAP-DC
Climatology, Volcanism, and Microbial Life in Ice with Downhole Loggers

0440609
2008-06-03 Bay, Ryan; Price, Buford No dataset link provided
Diving Physiology and Behavior of Emperor Penguins

0229638
2008-03-31 Ponganis, Paul
Diving Physiology and Behavior of Emperor Penguins
USAP-DC
Collaborative Research: Age, Origin and Climatic Significance of Buried Ice in the Western Dry Valleys, Antarctica

0338244
2007-12-10 Schaefer, Joerg No dataset link provided
Developing Dry Extraction of Ice Core Gases and Application to Millennial-Scale Variability in Atmospheric CO2

0337891
2007-11-05 Ahn, Jinho; Brook, Edward J.
Atmospheric CO2 and Climate: Taylor Dome Ice Core, Antarctica
USAP-DC
Atmospheric CO2 and Climate: Byrd Ice Core, Antarctica
USAP-DC
Constructing Paleoatmospheric Records of the Isotopic Composition of Methane and Nitrous Oxide

9526556
2007-07-09 Sowers, Todd A.
Carbon-13 Isotopic Composition of Atmospheric Methane in Firn Air, South Pole and Siple Dome, Antarctica
USAP-DC
Collaborative Research: Evolution and Biogeography of Late Cretaceous Vertebrates from the James Ross Basin, Antarctic Peninsula

0003844
2007-03-28 Case, Judd; Blake, Daniel
Expedition data of LMG0309
R2R
Expedition Data
R2R
Ice Core Records of Atmospheric Carbon Monoxide

0126194
2007-02-20 Harder, Susan
Access to data
NSIDC
Collaborative Research: Permian-Triassic Mass Extinction in Antarctica

0229917
2007-01-24 Becker, Luann No dataset link provided
Airborne Geophysical Survey of the Amundsen Sea Embayment, Antarctica (AGASEA)

0230197
2007-01-01 Blankenship, Donald D.; Fastook, James L.; Corr, Hugh F. J.; Holt, John W.; Morse, David L.; Vaughan, David G.; Young, Duncan A.
Subglacial Topography: Airborne Geophysical Survey of the Amundsen Sea Embayment, Antarctica
USAP-DC
Amundsen Sea Sector Data Set
USAP-DC
AGASEA 4.7 ka Englacial Isochron over the Thwaites Glacier Catchment
USAP-DC
How Thick Is the Convective Zone: A Study of Firn Air in the Megadunes Near Vostok, Antarctica

0230452
2006-09-27 Bauer, Rob; Albert, Mary R.; Severinghaus, Jeffrey P.
Antarctic megadunes
NSIDC
Collaborative Research: Refining a 500-kry Climate Record From the Moulton Blue Ice Field in West Antarctica

0230021
0230348
0230316
2006-08-01 White, James; Popp, Trevor; Dunbar, Nelia; Sowers, Todd A.; Steig, Eric J.
Mount Moulton Isotopes and Other Ice Core Data
USAP-DC
Collaborative Research: Trapped Gas Composition and the Chronology of the Vostok Ice Core

0230260
0230448
2006-01-18 Battle, Mark; Bender, Michael; Suwa, Makoto; Severinghaus, Jeffrey P.
Trapped Gas Composition and Chronology of the Vostok Ice Core
USAP-DC
Firn Air Inert Gas and Oxygen Observations from Siple Dome, 1996, and the South Pole, 2001
USAP-DC
Workshop for International Partnerships in Ice Core Sciences; March 13-16, 2004; Sterling, VA

0401116
2006-01-13 Twickler, Mark No dataset link provided
Collaborative Research: Characteristics of Snow Megadunes and Their Potential Effect on Ice Core Interpretation

0125570
0125276
2006-01-04 Courville, Zoe; Cathles, Mac; Scambos, Ted; Bauer, Rob; Fahnestock, Mark; Haran, Terry; Shuman, Christopher A.; Albert, Mary R.
Access AGDC data online by navigating to Data Sets. Data sets are arranged by Principal Investigators. Access data that are combined into multiple data sets, or compiled products.
NSIDC
The Antarctic Glaciological Data Center (AGDC) at the National Snow and Ice Data Center (NSIDC) archives and distributes Antarctic glaciological and cryospheric system data collected by the U.S. Antarctic Program.
NSIDC
Snow and Firn Permeability: Characteristics of Snow Megadunes and their Potential Effects on Ice Core Interpretation
USAP-DC
GPR and GPS Data: Characteristics of Snow Megadunes and their Potential Effects on Ice Core Interpretation
USAP-DC
AWS Data: Characteristics of Snow Megadunes and Their Potential Effect on Ice Core Interpretation
USAP-DC
Methyl chloride and methyl bromide in Antarctic ice cores

0338359
2005-11-16 Saltzman, Eric; Aydin, Murat; Williams, Margaret; Tatum, Cheryl
Methane and Carbonyl Sulfide Analysis of Siple Dome Ice Core Subsamples
USAP-DC
Ice Core Air Carbonyl Sulfide Measurements - SPRESSO Ice Core
USAP-DC
Antarctic Ice Cores: Methyl Chloride and Methyl Bromide
USAP-DC
Analysis of Siple Dome Ice Core: Carbonyl Sulfide (COS), Methyl Chloride (CH3Cl), and Methyl Bromide (CH3Br)
USAP-DC
Constructing the first D/H record of atmospheric methane covering the last two centuries.

0125900
2005-05-26 Sowers, Todd A. No dataset link provided
Generating an Isotopic Record of Atmospheric Methane and Nitrous Oxide Over the Last Century from South Pole Firn Air

0125981
2005-05-05 Sowers, Todd A. No dataset link provided
Argon and nitrogen isotope measurements in the Vostok ice core as aconstraint on phasing of CO2 and temperature changes

0125468
2005-02-01 Severinghaus, Jeffrey P. No dataset link provided
Characterization of Climatic Events for the Last 2 x 103y through the Retrieval of Ice Cores from the Transantarctic Mountains, Antarctica

8411018
2004-08-26 Frisic, David; Meese, Deb; Gow, Tony; Saltzman, Eric; Mayewski, Paul A.; Sowers, Todd A.; Welch, Kathy A.; Grootes, Pieter; Watson, M. Scott; Grootes, Peiter
Newall Glacier Ice Core and Snow Pit Beta Profiles, Chemistry, and Stratigraphy
USAP-DC
Dominion Range Ice Core Beta Profiles, Chemistry, and Density Data
USAP-DC
Newall Glacier Snow Pit and Ice Core, 1987 to 1989
USAP-DC
Collaborative Research: Studies of Trapped Gases in Firn and Ice from Antarctic Deep Ice Cores

9714687
2004-08-26 Blunier, Thomas; Fluckiger, Jacqueline; Thompson, Lonnie G.; Brook, Edward J.
Byrd Ice Core Microparticle and Chemistry Data
USAP-DC
A Sulfate-based Volcanic Record from South Pole Ice Cores

0087151
2004-04-09 Cole-Dai, Jihong
Sulfate-Based Volcanic Record from South Pole Ice Core
USAP-DC
Physical and Structural Properties of the Siple Dome Core

9527262
2003-05-14 Gow, Tony; Meese, Deb
Physical and Structural Properties of the Siple Dome Ice Cores
USAP-DC
Collaborative Research: Seismic Traverse of the Byrd Subglacial Basin-Field Test

9222121
2002-01-01 Bender, Michael; Dalziel, Ian W.
Concentration and Isotopic Composition of O2 and N2 in Trapped Gases of the Vostok Ice Core
USAP-DC
Carbon Dioxide and Carbon Isotopes in the Taylor Dome and Vostok Ice Cores

9615292
2002-01-01 Steig, Eric J.; Wahlen, Martin; Smith, Jesse; Brook, Edward J.; Indermuhle, A.; Mayewski, Paul A.; Sowers, Todd A.
Taylor Dome Ice Core Chemistry, Ion, and Isotope Data
USAP-DC
Carbon-Isotopic Composition of Atmospheric CO2 since the Last Glacial Maximum
USAP-DC
Near-Surface Processes Affecting Gas Exchange: West Antarctic Ice Sheet

9526601
2001-12-01 Albert, Mary R.
Snow and Firn Temperature and Permeability Measurements from Siple Dome, Antarctica
USAP-DC
Thermal Fractionation of Firn Air and the Ice Core Record of Abrupt Interstadial Climate Change

9725305
2001-01-01 Battle, Mark; Grachev, Alexi; Severinghaus, Jeffrey P.
Firn Air Isotope and Temperature Measurements from Siple Dome and South Pole
USAP-DC