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首页> 外文期刊>Remote Sensing of Environment: An Interdisciplinary Journal >The ozone climate change initiative: Comparison of four Level-2 processors for the Michelson Interferometer for Passive Atmospheric Sounding (MIPAS)
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The ozone climate change initiative: Comparison of four Level-2 processors for the Michelson Interferometer for Passive Atmospheric Sounding (MIPAS)

机译：臭氧气候变化倡议：迈克尔逊无源大气探测（MIPAS）干涉仪的四个Level-2处理器的比较

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摘要

The MIPAS spectrometer onboard the Envisat platform observed infrared emission from the Earth's limb between 2002 and 2012. It recorded high-resolution spectra during day and night, from pole to pole and between 6 and 70 km altitude in the nominal measurement mode or up to 170 km in special measurement modes, producing daily more than 1000 vertical profiles of various trace gases. The operational Level-2 data are processed by ESA/DLR but there exist three other, independent research Level-2 processors that are hosted by ISAC-CNR/University of Bologna, Oxford University, and KIT IMK/IAA. All four Level-2 processors rely on the same Level-1b data provided by ESA but their retrieval schemes differ. As part of ESA's Ozone Climate Change Initiative project, an intercomparison of the four MIPAS processors took place, in which vertical ozone profiles retrieved by these four processors from MIPAS nominal mode measurements were compared for 2007 and 2008. We present the results of this comparison exercise, which consisted of five parts: an information content study of the vertical averaging kernels, an intercomparison of zonal seasonal means and spreads, a determination of biases through comparison to ozonesonde and lidar measurements, a comparison to other satellite records (bias estimation and precision assessment with respect to ACE-FTS and Aura-MLS data), and a geophysical validation of the provided error bars using MIPAS MIPAS collocations.
机译：Envisat平台上的MIPAS光谱仪在2002年至2012年期间观察到了地球四肢的红外辐射。它记录了白天和黑夜的高分辨率光谱，标称测量模式下从极点到极点之间的海拔高度在6至70 km或高达170在特殊的测量模式下，每公里可产生1000多种不同微量气体的垂直剖面。可操作的Level-2数据由ESA / DLR处理，但还有另外三个独立的研究Level-2处理器，它们由ISAC-CNR /博洛尼亚大学，牛津大学和KIT IMK / IAA托管。所有四个Level-2处理器都依赖于ESA提供的相同Level-1b数据，但是它们的检索方案不同。作为欧空局臭氧气候变化倡议项目的一部分，对四个MIPAS处理器进行了比对，比较了这四个处理器从MIPAS名义模式测量中获得的2007年和2008年的垂直臭氧剖面。我们介绍了此比较练习的结果，由五个部分组成：垂直平均内核的信息内容研究，区域季节性均值和扩展范围的比对，通过与臭氧探空仪和激光雷达测量值的比较确定偏差，与其他卫星记录的比较（偏差估计和精度评估） ACE-FTS和Aura-MLS数据），并使用MIPAS MIPAS搭配对所提供的误差线进行地球物理验证。

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