Vertical resolution and information content of CO profiles retrieved by MOPITT

被引:112
作者
Deeter, MN
Emmons, LK
Edwards, DP
Gille, JC
Drummond, JR
机构
[1] Natl Ctr Atmospher Res, Div Atmospher Chem, Boulder, CO 80307 USA
[2] Univ Toronto, Dept Phys, Toronto, ON, Canada
关键词
D O I
10.1029/2004GL020235
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
The MOPITT ( Measurements of Pollution in the Troposphere) remote sensing instrument monitors the global distribution of carbon monoxide from a polar-orbiting platform. Calculated averaging kernels for operational MOPITT CO profiles indicate the capability of independently retrieving mid- and upper-tropospheric CO. The information content in MOPITT retrievals is objectively quantified through calculation of the Degrees of Freedom for Signal (DFS), which indicates the number of independent pieces of information in the retrieved profile. DFS values larger than 1 ( indicating some amount of profile shape information) are common in tropical and midlatitude scenes. The existence of shape information in actual MOPITT retrieved profiles is also verified through ( 1) a quantitative comparison with in-situ data acquired as part of MOPITT validation and ( 2) a qualitative comparison with monthly mean rain rate ( as an index for convection) in the Tropical Eastern Pacific Ocean.
引用
收藏
页码:L151121 / 4
页数:4
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