气候变化领域集成服务门户(CCPortal): Evaporation From the Southern Ocean Estimated on the Basis of AIRS Satellite Data

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DOI	10.1029/2019JD030845
	Evaporation From the Southern Ocean Estimated on the Basis of AIRS Satellite Data
	Boisvert L.; Vihma T.; Shie C.-L.
发表日期	2020
ISSN	2169897X
卷号	125 期号:1
英文摘要	Evaporation plays an important role in the global water and energy cycles and, hence, in climate change. Evaporation over the Southern Ocean, where the Antarctic sea ice coverage has a large annual cycle, is poorly quantified. In this study, daily evaporation is estimated for the Southern Ocean with a sea-ice-specific algorithm, using surface temperature and air humidity from National Aeronautics and Space Administration's Atmospheric Infrared Sounder (AIRS), and wind speeds from Modern-Era Retrospective Analysis for Research and Applications, Version 2 (MERRA-2), reanalysis during 2003–2016. An uncertainty of 34% was found in the evaporation product. The results indicate that annual evaporation has considerable interannual and regional variability, but with a decreasing trend during the study period over most of the Southern Ocean. There are, however, areas where evaporation has increased, specifically in the Ross Sea in winter and summer, with smaller positive trends in spring and fall. Overall, the changes in the difference between the surface specific humidity and the air specific humidity, and to a much lesser extent in the wind speed, are the main drivers for the changes in evaporation throughout the year. During spring and fall months, changes to the sea ice cover, which alter the surface specific humidity, are the main drivers for the change, but in summer and winter the main driver is the air-specific humidity. Air masses originating from the Antarctic continent (south) are associated with cold and dry conditions, which increase evaporation, whereas air masses from lower latitudes in the Southern Ocean (north) are associated with warm and moist conditions, decreasing evaporation. Comparisons with other reanalysis evaporation products produce similar trends, although annual averages differ. ©2019. This article has been contributed to by US Government employees and their work is in the public domain in the USA.
英文关键词	AIRS; evaporation; sea ice; Southern Ocean
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/186242
作者单位	Cryospheric Sciences Lab, NASA Goddard Space Flight Center, Greenbelt, MD, United States; Finnish Meteorological Institute, Helsinki, Finland; Joint Center for Earth Systems Technology (JCET), University of Maryland, Baltimore County, Baltimore, MD, United States
推荐引用方式 GB/T 7714	Boisvert L.,Vihma T.,Shie C.-L.. Evaporation From the Southern Ocean Estimated on the Basis of AIRS Satellite Data[J],2020,125(1).
APA	Boisvert L.,Vihma T.,&Shie C.-L..(2020).Evaporation From the Southern Ocean Estimated on the Basis of AIRS Satellite Data.Journal of Geophysical Research: Atmospheres,125(1).
MLA	Boisvert L.,et al."Evaporation From the Southern Ocean Estimated on the Basis of AIRS Satellite Data".Journal of Geophysical Research: Atmospheres 125.1(2020).