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Atmospheric Nitrate Isotopic Analysis at Amundsen-Scott South Pole Station, A Twenty-Five Year Record Data DOI: https://doi.org/10.7265/N5TT4NWF Cite as Thiemens, M. H., & Savarino, J. (2006) "Atmospheric Nitrate Isotopic Analysis at Amundsen-Scott South Pole Station, A Twenty-Five Year Record" U.S. Antarctic Program (USAP) Data Center. doi: https://doi.org/10.7265/N5TT4NWF. AMD - DIF Record(s) NSIDC-0281_1 Abstract This data set contains snow pit measurements of oxygen isotopes, <sup>17</sup>O and <sup>18</sup>O, in nitrate and ion concentrations, and surface measurements of oxygen isotopes in nitrate and in nitrate aerosols from the Amundsen-Scott South Pole Station, Antarctica. The 6-meter snow pit provides investigators with a 25-year record of nitrate isotope variations and ion concentrations for a period spanning from 1979 to 2004. Monthly surface snow and weekly aerosol collections yield a year-long record of nitrate isotopic composition starting 01 December 2003 and ending 31 December 2004. Little is known about the past denitrification of the stratosphere in high latitude regions. Such knowledge is important to understanding the chemical state of the ancient atmospheres and evaluating the present climate models. With this research, investigators aim to understand the denitrification of the Antarctic stratosphere and quantify the sources of nitrate aerosols over time. Data are in Microsoft Excel format and are available via FTP. Creator(s): Thiemens, Mark H.; Savarino, Joel Date Created: 2006-11-01 Repository: USAP-DC (current) - NSIDC (original) License: Creative Commons Attribution-NonCommercial v4.0 Generic [CC BY-NC 4.0] Spatial Extent(s) West: 139.2728, East: 139.2728, South: -89.9975, North: -89.9975 Temporal Extent(s) Start: 2003-12-01 - End: 2004-12-31 Award(s) NSF 0125761 Version: 1 Related Project(s) South Pole Atmospheric Nitrate Isotopic Analysis (SPANIA) References McCabe, J. R., J. Savarino, and M. H. Thiemens. 2005. Isotopic analysis of nitrate in South Pole snow and air. Eos. Trans. AGU 86(52). Fall Meeting Suppl., Abstract A13F-04. Keywords Aerosol Antarctica Atmosphere Chemistry:fluid Geochemistry NBP1502 Snow/ice South Pole Station