Satellite observation of atmospheric methane: intercomparison between AIRS and GOSAT TANSO-FTS retrievals

	Satellite observation of atmospheric methane: intercomparison between AIRS and GOSAT TANSO-FTS retrievals
	Zou, Mingmin 1; Xiong, Xiaozhen 1; Saitoh, Naoko 1; Warner, Juying 1; Zhang, Ying 1; Chen, Liangfu 1; Weng, Fuzhong 1; Fan, Meng 1
刊名	ATMOSPHERIC MEASUREMENT TECHNIQUES
	2016
卷号	9 期号:8 页码:3567-3576
通讯作者	Zhang, Y ; Fan, M (reprint author), Chinese Acad Sci, Inst Remote Sensing & Digital Earth, State Key Lab Remote Sensing Sci, Beijing 100101, Peoples R China.
英文摘要	Space-borne observations of atmospheric methane (CH4) have been made using the Atmospheric Infrared Sounder (AIRS) on the EOS/Aqua satellite since August 2002 and the Thermal and Near-infrared Sensor for Carbon Observation Fourier Transform Spectrometer (TANSOFTS) on the Greenhouse Gases Observing Satellite (GOSAT) since April 2009. This study compared the GOSAT TANSOFTS thermal infrared (TIR) version 1.0 CH4 product with the collocated AIRS version 6 CH4 product using data from 1 August 2010 to 30 June 2012, including the CH4 mixing ratios and the total column amounts. The results show that at 300-600 hPa, where both AIRS and GOSAT-TIR CH4 have peak sensitivities, they agree very well, but GOSAT-TIR retrievals tend to be higher than AIRS in layer 200-300 hPa. At 300 hPa the CH4 mixing ratio from GOSAT-TIR is, on average, 10.3 +/- 31.8 ppbv higher than that from AIRS, and at 600 hPa GOSAT-TIR retrieved CH4 is 16.2 +/- 25.7 ppbv lower than AIRS CH4. Comparison of the total column amount of CH4 shows that GOSAT-TIR agrees with AIRS to within 1% in the mid-latitude regions of the Southern Hemisphere and in the tropics. In the mid to high latitudes in the Northern Hemisphere, comparison shows that GOSAT-TIR is similar to 1-2% lower than AIRS, and in the high-latitude regions of the Southern Hemisphere the difference of GOSAT from AIRS varies from 3% in October to +2% in July. The difference between AIRS and GOSAT TANSO-FTS retrievals is mainly due to the difference in retrieval algorithms and instruments themselves, and the larger difference in the highlatitude regions is associated with the low information content and small degrees of freedom of the retrieval. The degrees of freedom of GOSAT-TIR retrievals are lower than that of AIRS, which also indicates that the constraint in GOSAT-TIR retrievals may be too strong. From the good correlation between AIRS and GOSAT-TIR retrievals and the seasonal variation they observed, we are confident that the thermal infrared measurements from AIRS and GOSAT-TIR can provide valuable information to capture the spatial and temporal variation of CH4, especially in the mid-upper troposphere, in most periods and regions.
学科主题	Meteorology & Atmospheric Sciences
类目[WOS]	Meteorology & Atmospheric Sciences
收录类别	SCI
语种	英语
WOS记录号	WOS:000383049600002
内容类型	期刊论文
源URL	[http://ir.radi.ac.cn/handle/183411/39247]
专题	遥感与数字地球研究所_SCI/EI期刊论文_期刊论文
作者单位	1.Chinese Acad Sci, Inst Remote Sensing & Digital Earth, State Key Lab Remote Sensing Sci, Beijing 100101, Peoples R China 2.Earth Resources Technol Inc, Laurel, MD USA 3.NOAA, Ctr Satellite Applicat & Res, College Pk, MD 20740 USA 4.Chiba Univ, Ctr Environm Remote Sensing, Inage Ku, 1-33 Yayoi Cho, Chiba, Japan 5.Univ Maryland, Dept Atmospher & Ocean Sci, College Pk, MD 20740 USA
推荐引用方式 GB/T 7714	Zou, Mingmin,Xiong, Xiaozhen,Saitoh, Naoko,et al. Satellite observation of atmospheric methane: intercomparison between AIRS and GOSAT TANSO-FTS retrievals[J]. ATMOSPHERIC MEASUREMENT TECHNIQUES,2016,9(8):3567-3576.
APA	Zou, Mingmin.,Xiong, Xiaozhen.,Saitoh, Naoko.,Warner, Juying.,Zhang, Ying.,...&Fan, Meng.(2016).Satellite observation of atmospheric methane: intercomparison between AIRS and GOSAT TANSO-FTS retrievals.ATMOSPHERIC MEASUREMENT TECHNIQUES,9(8),3567-3576.
MLA	Zou, Mingmin,et al."Satellite observation of atmospheric methane: intercomparison between AIRS and GOSAT TANSO-FTS retrievals".ATMOSPHERIC MEASUREMENT TECHNIQUES 9.8(2016):3567-3576.