Preliminary validation of column-averaged volume mixing ratios of carbon dioxide and methane retrieved from GOSAT short-wavelength infrared spectra
Preliminary validation of column-averaged volume mixing ratios of carbon dioxide and methane retrieved from GOSAT short-wavelength infrared spectra
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DOI：
10.5194/amt-4-1061-2011
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发表时间：
2011-01-01
影响因子：
3.8
通讯作者：
Rettinger, M.
中科院分区：
文献类型：
--
作者：
Morino, I.;Uchino, O.;Rettinger, M.
从温室气体观测卫星短波红外观测中反演的二氧化碳和甲烷的柱平均体积混合比（GOSAT SWIR X-CO2和X-CH 4）与地面高分辨率傅里叶变换光谱仪获得的参考校准数据进行了比较（g-b）参与碳柱总量观测网络（TCCON）的FTS。初步结果如下：GOSAT SWIR X-CO2和X-CH 4（版本01.xx）分别偏低8.85 +/- 4.75 ppm（2.3 +/-1.2%）和20.4 +/- 18.9 ppb（1.2 +/-1.1%）。在将X-CO 2和X-CH 4的负偏差分别校正8.85 ppm和20.4 ppb后，GOSAT SWIR X-CO 2和X-CH 4的标准偏差约为1%（1 sigma）。GOSAT SWIR X-CO_2和X-CH_4纬向平均值的纬向分布与g-b FTS资料的纬向分布相似，但GOSAT资料存在负偏差。
Column-averaged volume mixing ratios of carbon dioxide and methane retrieved from the Greenhouse gases Observing SATellite (GOSAT) Short-Wavelength InfraRed observation (GOSAT SWIR X-CO2 and X-CH4) were compared with the reference calibrated data obtained by ground-based high-resolution Fourier Transform Spectrometers (g-b FTSs) participating in the Total Carbon Column Observing Network (TCCON).Preliminary results are as follows: the GOSAT SWIR X-CO2 and X-CH4 (Version 01.xx) are biased low by 8.85 +/- 4.75 ppm (2.3 +/- 1.2 %) and 20.4 +/- 18.9 ppb (1.2 +/- 1.1 %), respectively. The standard deviation of the GOSAT SWIR X-CO2 and X-CH4 is about 1% (1 sigma) after correcting the negative biases of X-CO2 and X-CH4 by 8.85 ppm and 20.4 ppb, respectively. The latitudinal distributions of zonal means of the GOSAT SWIR X-CO2 and X-CH4 show similar features to those of the g-b FTS data except for the negative biases in the GOSAT data.