气候变化领域集成服务门户(CCPortal): Recent arctic ocean surface air temperatures in atmospheric reanalyses and numerical simulations

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DOI	10.1175/JCLI-D-19-0703.1
	Recent arctic ocean surface air temperatures in atmospheric reanalyses and numerical simulations
	Marquardt Collow A.B.; Cullather R.I.; Bosilovich M.G.
发表日期	2020
ISSN	0894-8755
起始页码	4347
结束页码	4367
卷号	33 期号:10
英文摘要	Surface air temperatures have recently increased more rapidly in the Arctic than elsewhere in the world, but large uncertainty remains in the time series and trend. Over the data-sparse sea ice zone, the retrospective assimilation of observations in numerical reanalyses has been thought to offer a possible, but challenging, avenue for adequately reproducing the historical time series. Focusing on the central Arctic Ocean, output is analyzed from 12 reanalyses with a specific consideration of two widely used products: the Modern-Era Retrospective Analysis for Research and Applications, version 2 (MERRA-2), and the European Centre for Medium-Range Weather Forecasts interim reanalysis (ERA-Interim, hereafter ERA-I). Among the reanalyses considered, a trend of 0.9 K decade21 is indicated but with an uncertainty of 6%, and a large spread in mean values. There is a partitioning among those reanalyses that use fractional sea ice cover and those that employ a threshold, which are colder in winter by an average of 2 K but agree more closely with in situ observations. For reanalyses using fractional sea ice cover, discrepancies in the ice fraction in autumn and winter explain most of the differences in air temperature values. A set of experiments using the MERRA-2 background model using MERRA-2 and ERA-I sea ice and sea surface temperature indicates significant effects of boundary condition differences on air temperatures, and a preferential warm bias inherent in the MERRA-2 model sea ice representation. Differences between experiments and reanalyses suggest the available observations apply a significant constraint on reanalysis mean temperatures. © 2020 American Meteorological Society. For information regarding reuse of this content and general copyright information, consult the AMS Copyright Policy (www.ametsoc.org/PUBSReuseLicenses).
英文关键词	Oceanography; Sea ice; Surface waters; Time series; Weather forecasting; Background model; European centre for medium-range weather forecasts; In-situ observations; Mean temperature; Research and application; Retrospective analysis; Sea surface temperature (SST); Surface air temperatures; Atmospheric temperature; air temperature; arctic environment; atmospheric dynamics; computer simulation; numerical model; sea ice; seasonal variation; surface temperature; Arctic Ocean
语种	英语
来源期刊	Journal of Climate
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/171312
作者单位	Universities Space Research Association, Columbia, United States; Global Modeling and Assimilation Office, NASA Goddard Space Flight Center, Greenbelt, MD, United States; Earth System Science Interdisciplinary Center, University of Maryland, College Park, College Park, United States; Global Modeling and Assimilation Office, NASA Goddard Space Flight Center, Greenbelt, MD, United States; Global Modeling and Assimilation Office, NASA Goddard Space Flight Center, Greenbelt, MD, United States
推荐引用方式 GB/T 7714	Marquardt Collow A.B.,Cullather R.I.,Bosilovich M.G.. Recent arctic ocean surface air temperatures in atmospheric reanalyses and numerical simulations[J],2020,33(10).
APA	Marquardt Collow A.B.,Cullather R.I.,&Bosilovich M.G..(2020).Recent arctic ocean surface air temperatures in atmospheric reanalyses and numerical simulations.Journal of Climate,33(10).
MLA	Marquardt Collow A.B.,et al."Recent arctic ocean surface air temperatures in atmospheric reanalyses and numerical simulations".Journal of Climate 33.10(2020).