气候变化领域集成服务门户(CCPortal): Assessment of Upper Tropospheric Water Vapor Monthly Variation in Reanalyses With Near-Global Homogenized 6.5-μm Radiances From Geostationary Satellites

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DOI	10.1029/2020JD032695
	Assessment of Upper Tropospheric Water Vapor Monthly Variation in Reanalyses With Near-Global Homogenized 6.5-μm Radiances From Geostationary Satellites
	Xue Y.; Li J.; Li Z.; Lu R.; Gunshor M.M.; Moeller S.L.; Di D.; Schmit T.J.
发表日期	2020
ISSN	2169897X
卷号	125 期号:18
英文摘要	The monthly variation of upper tropospheric water vapor (UTWV) simulated by six reanalysis data sets is evaluated with homogenized water vapor radiance observations from international geostationary (GEO) weather satellites by using a profile-to-radiance approach over 45°N to 45°S regions for the period 2015–2017. Results show that reanalysis data sets have an overall good agreement with observations. However, a widespread wet bias is found in all reanalyses and is more dominant in large-scale subsidence regions. JRA55 has the smallest wet bias while MERRA-2 exhibits the most humid upper troposphere. The temporal variation of brightness temperatures in response to the warm phase of El Niño-Southern Oscillation (ENSO) in 2015–2016 indicates that the UTWV field is regulated by both ascending and descending branches of the large-scale circulation. All six reanalyses roughly capture the temporal variation of UTWV in the developing and decay year of this ENSO event. However, they tend to overestimate the eastward propagation of high UTWV in the developing year, especially MERRA-2. The UTWV gradient over the tropical Pacific in the decay year is underestimated, with a dry bias over the convective western Pacific and a wet bias over the eastern Pacific in reanalysis data sets. These results may provide a useful tool for the climate modeling community for identifying and solving problems associated with UTWV simulation. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	evaluation; GEO weather satellites; reanalyses; UTWV; WV band radiance
语种	英语
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/185753
作者单位	Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China; Cooperative Institute for Meteorological Satellite Studies, University of Wisconsin-Madison, Madison, WI, United States; College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing, China; Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, School of Atmospheric Physics, Nanjing University of Information Science and Technology, Nanjing, China; NOAA/NESDIS/Center for Satellite Applications and Research, Madison, WI, United States
推荐引用方式 GB/T 7714	Xue Y.,Li J.,Li Z.,et al. Assessment of Upper Tropospheric Water Vapor Monthly Variation in Reanalyses With Near-Global Homogenized 6.5-μm Radiances From Geostationary Satellites[J],2020,125(18).
APA	Xue Y..,Li J..,Li Z..,Lu R..,Gunshor M.M..,...&Schmit T.J..(2020).Assessment of Upper Tropospheric Water Vapor Monthly Variation in Reanalyses With Near-Global Homogenized 6.5-μm Radiances From Geostationary Satellites.Journal of Geophysical Research: Atmospheres,125(18).
MLA	Xue Y.,et al."Assessment of Upper Tropospheric Water Vapor Monthly Variation in Reanalyses With Near-Global Homogenized 6.5-μm Radiances From Geostationary Satellites".Journal of Geophysical Research: Atmospheres 125.18(2020).