[{"awards": "1141978 Foreman, Christine", "bounds_geometry": ["POLYGON((161.1667 -77.117,161.21673 -77.117,161.26676 -77.117,161.31679 -77.117,161.36682 -77.117,161.41685 -77.117,161.46688 -77.117,161.51691 -77.117,161.56694 -77.117,161.61697 -77.117,161.667 -77.117,161.667 -77.117,161.667 -77.117,161.667 -77.117,161.667 -77.117,161.667 -77.117,161.667 -77.117,161.667 -77.117,161.667 -77.117,161.667 -77.117,161.667 -77.117,161.61697 -77.117,161.56694 -77.117,161.51691 -77.117,161.46688 -77.117,161.41685 -77.117,161.36682 -77.117,161.31679 -77.117,161.26676 -77.117,161.21673 -77.117,161.1667 -77.117,161.1667 -77.117,161.1667 -77.117,161.1667 -77.117,161.1667 -77.117,161.1667 -77.117,161.1667 -77.117,161.1667 -77.117,161.1667 -77.117,161.1667 -77.117,161.1667 -77.117))"], "date_created": "Fri, 23 Mar 2018 00:00:00 GMT", "description": "Mass spectra of external metabolites were obtained with a 1290 Ultra Performance Liquid Chromatography system coupled to a 6538 Ultra High Definition Accurate-Mass Quadrupole-Time of Flight mass spectrometer operated in positive mode with an electrospray ionization source (Agilent Technologies). 30 mL of filtered media was concentrated per sample by solid phase extraction. External metabolites were re-suspended in 50% (v/v) acetonitrile, and were separated using a reverse-phase Kinetix 1.7 um C18, 100A, 150 mm - 2.1 mm column. Data presented are from UPLC-Q-TOF measurements of mass to charge ratio, retention time, and replicate-averaged extracted ion chromatogram abundance values (counts) of molecular species that demonstrated a significant change in abundance (Two-way ANOVA, adjusted P\u003c0.01) during incubations based on time point (T0: d0, T1: d27, T2: d63, T3: d98) and carbon source (Cotton Glacier: CG, Pony Lake: PL, Suwannee River: SR).", "east": 161.667, "geometry": ["POINT(161.41685 -77.117)"], "keywords": "Antarctica; Biota; Exometabolites; Mass Spectrometry; Microbes; Microbiology", "locations": "Antarctica", "north": -77.117, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Foreman, Christine; Tigges, Michelle; Bothner, Brian", "project_titles": "Multidimensional \"omics\" characterization of microbial metabolism and dissolved organic matter in Antarctica", "projects": [{"proj_uid": "p0000408", "repository": "USAP-DC", "title": "Multidimensional \"omics\" characterization of microbial metabolism and dissolved organic matter in Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.117, "title": "UPLC-Q-TOF data of Cotton Glacier exometabolites", "uid": "601089", "west": 161.1667}, {"awards": "9222121 Dalziel, Ian; 9318121 Anandakrishnan, Sridhar", "bounds_geometry": ["POINT(106.48 -72.28)"], "date_created": "Tue, 01 Jan 2002 00:00:00 GMT", "description": "These data describe the d18O of O2, d15N of N2, d18Oatm, and O2/N2 ratios of trapped gases in the Vostok ice core from East Antarctica. The investigator used a mass spectrometer to measure gas concentrations and isotopic compositions. Data extend to approximately 420,000 years ago. Two different age models are included.\n\nData are available in tab-delimited ASCII format via ftp.", "east": 106.48, "geometry": ["POINT(106.48 -72.28)"], "keywords": "Antarctica; Chemistry:fluid; Chemistry:Fluid; Geochemistry; Glaciology; Ice Core Records; Lake Vostok; Paleoclimate; UPLC-Q-TOF; Vostok Ice Core", "locations": "Lake Vostok; Antarctica", "north": -72.28, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Bender, Michael", "project_titles": "Collaborative Research: Seismic Traverse of the Byrd Subglacial Basin-Field Test", "projects": [{"proj_uid": "p0000150", "repository": "USAP-DC", "title": "Collaborative Research: Seismic Traverse of the Byrd Subglacial Basin-Field Test"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -72.28, "title": "Concentration and Isotopic Composition of O2 and N2 in Trapped Gases of the Vostok Ice Core", "uid": "609107", "west": 106.48}]

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Dataset Title/Abstract/Map	NSF Award(s)	Date Created	PIs / Scientists	Project Links	Abstract	Bounds Geometry	Geometry	Selected	Visible
UPLC-Q-TOF data of Cotton Glacier exometabolites	1141978	2018-03-23	Foreman, Christine; Tigges, Michelle; Bothner, Brian	Multidimensional "omics" characterization of microbial metabolism and dissolved organic matter in Antarctica	Mass spectra of external metabolites were obtained with a 1290 Ultra Performance Liquid Chromatography system coupled to a 6538 Ultra High Definition Accurate-Mass Quadrupole-Time of Flight mass spectrometer operated in positive mode with an electrospray ionization source (Agilent Technologies). 30 mL of filtered media was concentrated per sample by solid phase extraction. External metabolites were re-suspended in 50% (v/v) acetonitrile, and were separated using a reverse-phase Kinetix 1.7 um C18, 100A, 150 mm - 2.1 mm column. Data presented are from UPLC-Q-TOF measurements of mass to charge ratio, retention time, and replicate-averaged extracted ion chromatogram abundance values (counts) of molecular species that demonstrated a significant change in abundance (Two-way ANOVA, adjusted P<0.01) during incubations based on time point (T0: d0, T1: d27, T2: d63, T3: d98) and carbon source (Cotton Glacier: CG, Pony Lake: PL, Suwannee River: SR).	["POLYGON((161.1667 -77.117,161.21673 -77.117,161.26676 -77.117,161.31679 -77.117,161.36682 -77.117,161.41685 -77.117,161.46688 -77.117,161.51691 -77.117,161.56694 -77.117,161.61697 -77.117,161.667 -77.117,161.667 -77.117,161.667 -77.117,161.667 -77.117,161.667 -77.117,161.667 -77.117,161.667 -77.117,161.667 -77.117,161.667 -77.117,161.667 -77.117,161.667 -77.117,161.61697 -77.117,161.56694 -77.117,161.51691 -77.117,161.46688 -77.117,161.41685 -77.117,161.36682 -77.117,161.31679 -77.117,161.26676 -77.117,161.21673 -77.117,161.1667 -77.117,161.1667 -77.117,161.1667 -77.117,161.1667 -77.117,161.1667 -77.117,161.1667 -77.117,161.1667 -77.117,161.1667 -77.117,161.1667 -77.117,161.1667 -77.117,161.1667 -77.117))"]	["POINT(161.41685 -77.117)"]	false	false
Concentration and Isotopic Composition of O2 and N2 in Trapped Gases of the Vostok Ice Core	9222121 9318121	2002-01-01	Bender, Michael	Collaborative Research: Seismic Traverse of the Byrd Subglacial Basin-Field Test	These data describe the d18O of O2, d15N of N2, d18Oatm, and O2/N2 ratios of trapped gases in the Vostok ice core from East Antarctica. The investigator used a mass spectrometer to measure gas concentrations and isotopic compositions. Data extend to approximately 420,000 years ago. Two different age models are included. Data are available in tab-delimited ASCII format via ftp.	["POINT(106.48 -72.28)"]	["POINT(106.48 -72.28)"]	false	false

USAP-DC

U.S. ANTARCTIC PROGRAM DATA CENTER

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