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首页> 外文期刊>Atmospheric Measurement Techniques >Long-term validation of ESA operational retrieval (version?6.0) of MIPAS Envisat vertical profiles of methane, nitrous oxide, CFC11, and CFC12 using balloon-borne observations and trajectory matching
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Long-term validation of ESA operational retrieval (version?6.0) of MIPAS Envisat vertical profiles of methane, nitrous oxide, CFC11, and CFC12 using balloon-borne observations and trajectory matching

机译：长期验证MIPAS的ESA作业取回（6.0版）使用气球观测和轨迹匹配，对甲烷，一氧化二氮，CFC11和CFC12的垂直剖面进行Envisat

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MIPAS-Envisat is a satellite-borne sensor which measured vertical profiles of a wide range of trace gases from 2002 to 2012 using IR emission spectroscopy. We present geophysical validation of the MIPAS-Envisat operational retrieval (version?6.0) of Nsub2/subO, CHsub4/sub, CFC-12, and CFC-11 by the European Space Agency?(ESA). The geophysical validation data are derived from measurements of samples collected by a cryogenic whole air sampler flown to altitudes of up to 34 km by means of large scientific balloons. In order to increase the number of coincidences between the satellite and the balloon observations, we applied a trajectory matching technique. The results are presented for different time periods due to a change in the spectroscopic resolution of MIPAS in early 2005. Retrieval results for Nsub2/subO, CHsub4/sub, and CFC-12 show partly good agreement for some altitude regions, which differs for the periods with different spectroscopic resolution. The more recent low spectroscopic resolution data above 20 km altitude show agreement with the combined uncertainties, while there is a tendency of the earlier high spectral resolution data set to underestimate these species above 25 km. The earlier high spectral resolution data show a significant overestimation of the mixing ratios for Nsub2/subO, CHsub4/sub, and CFC-12 below 20 km. These differences need to be considered when using these data. The CFC-11 results from the operation retrieval version?6.0 cannot be recommended for scientific studies due to a systematic overestimation of the CFC-11 mixing ratios at all altitudes.
机译：MIPAS-Envisat是一个卫星传感器，使用红外发射光谱仪测量了2002年至2012年各种痕量气体的垂直剖面。我们介绍了欧洲空间局对N 2 O，CH 4 ，CFC-12和CFC-11进行MIPAS-Envisat操作检索（6.0版）的地球物理验证代理商（ESA）。地球物理验证数据来自于通过大型科学气球飞行到最高34 km的低温全空气采样器采集的样品的测量结果。为了增加卫星观测与气球观测之间的重合次数，我们应用了轨迹匹配技术。由于2005年初MIPAS的光谱分辨率发生变化，结果在不同的时间段显示。N 2 O，CH 4 和CFC-12的检索结果在某些海拔区域显示出部分良好的一致性，不同光谱分辨率的时期也有所不同。海拔20公里以上的最新低光谱分辨率数据显示出综合不确定性，而较早的光谱分辨率高的数据则有可能低估了海拔25公里以上的这些物种。较早的高光谱分辨率数据显示，在20 km以下，N 2 O，CH 4 和CFC-12的混合比明显过高。使用这些数据时需要考虑这些差异。由于系统地高估了所有海拔高度的CFC-11混合比，因此不建议将6.0版本的操作检索结果得出的CFC-11结果用于科学研究。

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