Atmospheric Nitrate Isotopic Analysis at Amundsen-Scott South Pole Station, A Twenty-Five Year Record

Abstract: This data set contains snow pit measurements of oxygen isotopes, ¹⁷O and ¹⁸O, 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.摘要：本数据集包含来自南极洲阿蒙森-斯科特南极站的雪坑氧同位素（¹⁷O、¹⁸O）、硝酸盐及离子浓度测量数据，以及硝酸盐与硝酸盐气溶胶的地表氧同位素实测数据。该6米雪坑为研究人员提供了1979年至2004年间共计25年的硝酸盐同位素变化与离子浓度记录。月度地表积雪采样与周度气溶胶采集工作获得了2003年12月1日至2004年12月31日一整年的硝酸盐同位素组成记录。 目前学界对高纬度地区平流层的古反硝化过程所知甚少。此类认知对于理解古大气化学状态、评估现行气候模型均具有重要意义。本研究旨在厘清南极平流层的反硝化过程，并量化不同时期硝酸盐气溶胶的来源。 数据采用Microsoft Excel格式存储，可通过文件传输协议（File Transfer Protocol，FTP）获取。