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检索条件"作者=ZHANG Xing Ying~,BAI WenGuang~1,ZHANG Peng~1 & WANG WeiHe~1 1 Key Laboratory of Radiometric Calibration and Validation for Environmental Satellites,National Satellite meteorological Center,china meteorological administration,Beijing 100081,china"

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Spatiotemporal variations in mid-upper tropospheric methane over china from satellite observations

Spatiotemporal variations in mid-upper tropospheric methane ...

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作者： zhang xing ying~(1,2*),bai wenguang~1,zhang peng~1 & wang weihe~1 1 key laboratory of radiometric calibration and validation for environmental satellites,national satellite meteorological center,china meteorological administration,beijing 100081,china 2 State key laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry,Institute of Atmospheric Physics,Chinese Academy of Sciences,beijing 100029,china

Spaceborne measurements by the Atmospheric Infrared Sounder(AIRS) on the EOS/Aqua satellite provide a global view of methane (CH) distribution in the mid-upper troposphere(MUT-CH).The focus of this study is to analyze the spatiotemporal variations in MUT-CH over china from 2003 to *** of AIRS CH products versus Fourier transform infrared profiles demonstrates that its RMS error is mostly less than 1.5%.A typical atmospheric methane profile is found that shows how concentrations decrease as height increases because of surface *** found that an important feature in the seasonal variation in CH is the two peaks that exist in summer and winter in most parts of china,which is also observed in in-situ measurements at Mt. Waliguan,Qinghai Province,china(36.2879°N 100.8964°E,3810 m).Also,in the summer,only one peak existed in western and southern china since there are no more significant anthropogenic sources in winter than at any other time of the *** analysis of the deseasonahzed time-series of AIRS CH in three fixed pressure layers of AIRS from 2003 to 2008 indicates that CH in the Northern Hemisphere has increased abruptly since 2007,with no significant increase occurring before *** increase in china is generally more significant than in other areas around the world,which again correlates with in-situ measurements at ***.

关键词： satellite remote sensing mid-upper tropospheric methane sptiotemporal variation

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