Anthropogenic Impacts on Atmospheric Carbonyl Sulfide Since the 19th Century Inferred From Polar Firn Air and Ice Core Measurements
Anthropogenic Impacts on Atmospheric Carbonyl Sulfide Since the 19th Century Inferred From Polar Firn Air and Ice Core Measurements
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DOI：
10.1029/2020jd033074
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发表时间：
2020-06
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影响因子：
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通讯作者：
M. Aydin;G. Britten;S. Montzka;C. Buizert;F. Primeau;V. Petrenko;Mark O. Battle;M. R. Nicewonger;J. Patterson;B. Hmiel;E. Saltzman
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文献类型：
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作者：
M. Aydin;G. Britten;S. Montzka;C. Buizert;F. Primeau;V. Petrenko;Mark O. Battle;M. R. Nicewonger;J. Patterson;B. Hmiel;E. Saltzman
2001年至2015年期间，在格陵兰岛和南极洲的四个不同地点进行了七次不同的实地活动，在收集的积雪空气中测量了羰基硫化物（COS）。贝叶斯概率统计模型用于进行多站点反演，并重建格陵兰岛和南极洲的单独的大气历史。格陵兰岛上空的积雪逆温覆盖了世纪的大部分时间，而南极洲上空的积雪逆温则可以追溯到世纪。推导出的大气历史是一致的独立的地面空气时间序列数据从相应的网站和南极冰芯COS记录重叠期间。大气中的COS水平从19世纪世纪开始增加，超过了工业化前的水平，这种增加持续了世纪的大部分时间。大气中的COS在1975年左右在格陵兰岛和1987年左右在南极洲达到了比现在更高的水平。大气/海面箱模式被用来调查观测到的变化的可能原因。结果表明，人为源的大小和位置的变化有很大的影响，观测到的大气COS的变化。
Carbonyl sulfide (COS) was measured in firn air collected during seven different field campaigns carried out at four different sites in Greenland and Antarctica between 2001 and 2015. A Bayesian probabilistic statistical model is used to conduct multisite inversions and to reconstruct separate atmospheric histories for Greenland and Antarctica. The firn air inversions cover most of the 20th century over Greenland and extend back to the 19th century over Antarctica. The derived atmospheric histories are consistent with independent surface air time series data from the corresponding sites and the Antarctic ice core COS records during periods of overlap. Atmospheric COS levels began to increase over preindustrial levels starting in the 19th century, and the increase continued for much of the 20th century. Atmospheric COS peaked at higher than present‐day levels around 1975 CE over Greenland and around 1987 CE over Antarctica. An atmosphere/surface ocean box model is used to investigate the possible causes of observed variability. The results suggest that changes in the magnitude and location of anthropogenic sources have had a strong influence on the observed atmospheric COS variability.