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Influence of stratospheric sudden warming on AIRS midtropospheric CO_2

机译：平流层突然变暖对AIRS对流层CO_2的影响

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摘要

Midtropospheric CO_2 retrievals from the Atmospheric Infrared Sounder (AIRS) were used to explore the influence of stratospheric sudden warming (SSW) on CO_2 in the middle to upper troposphere. To choose the SSW events that had strong coupling between the stratosphere and troposphere, the authors applied a principal component analysis to the NCEP/Department of Energy Global Reanalysis 2 (NCEP-2) geopotential height data at 17 pressure levels. Two events (April 2003 and March 2005) that have strong couplings between the stratosphere and troposphere were chosen to investigate the influence of SSW on AIRS midtropospheric CO_2. The authors investigated the temporal and spatial variations of AIRS midtropospheric CO_2 before and after the SSW events and found that the midtropospheric CO_2 concentrations increased by 2-3 ppm within a few days after the SSW events. These results can be used to better understand how the chemical tracers respond to the large-scale dynamics in the high latitudes.
机译：利用大气红外测深仪（AIRS）的对流层中CO_2反演，探索了平流层突然变暖（SSW）对中高层对流层CO_2的影响。为了选择在平流层和对流层之间具有强烈耦合的SSW事件，作者将主成分分析应用于17个压力水平下的NCEP /能源全球再分析系2（NCEP-2）地势高度数据。选择了两个在平流层和对流层之间具有强耦合的事件（2003年4月和2005年3月）来研究SSW对AIRS对流层中层CO_2的影响。这组作者调查了南半球事件发生前后AIRS对流层CO_2的时空变化，发现南半球对流层CO_2浓度在南半球事件发生后几天内增加了2-3 ppm。这些结果可用于更好地了解化学示踪剂如何响应高纬度地区的大规模动力学。

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