气候变化领域集成服务门户(CCPortal): On the performance of twentieth century reanalysis products for Antarctic snow accumulation

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DOI	10.1007/s00382-019-05008-4
	On the performance of twentieth century reanalysis products for Antarctic snow accumulation
	Wang Y.; Hou S.; Ding M.; Sun W.
发表日期	2020
ISSN	0930-7575
起始页码	435
结束页码	455
卷号	54 期号:2020-01-02
英文摘要	The strengths and weakness of the Twentieth-Century Reanalysis (20CR), the Pilot reanalysis of the twentieth-century (ERA-20C), a coupled twentieth-century climate reanalysis product (CERA-20C), and an ensemble of ten twentieth-century atmospheric model integrations (ERA-20CM), are examined for Antarctic snow accumulation based on 3265 Antarctic multi-year averaged surface mass balance observations and 79 ice core snow accumulation time series, which provides an independent estimate because they are not assimilated into the reanalyses and not used to force ERA-20CM. The ECMWF “Interim” reanalysis (ERA-Interim) and two regional climate models (RACMO2 and MAR) are also used as a complementary analysis. Despite the magnitude discrepancy between simulations and observations, large-scale spatial variability in multi-year averaged snow accumulation observations are reasonably well reproduced by all the twentieth century datasets. The four datasets capture a large fraction (> 40%) of the interannual variability in the ice core snow accumulation composite over the Antarctic Peninsula from 1901 to 2010. However, none of the twentieth century datasets alone is able to explain > 20% of variance in ice core records at the other Antarctic regions during the twentieth century. Even for the modern satellite era (from 1979 onwards), their performance for Antarctic snow accumulation is still poorer, relative to ERA-Interim, RACMO2 and MAR. Considerable inhomogeneities and spurious changes in atmospheric circulation are found in these datasets, and thus the precipitation minus evaporation/sublimation (P–E) changes and trends during the past 100 years are largely artificial over Antarctica. © 2019, Springer-Verlag GmbH Germany, part of Springer Nature.
英文关键词	Antarctic Ice Sheet; In-situ observations; Precipitation minus evaporation; Reanalysis assessment
语种	英语
scopus关键词	atmospheric modeling; data set; evaporation; ice sheet; in situ measurement; performance assessment; precipitation assessment; snow accumulation; twentieth century; Antarctic Ice Sheet; Antarctica
来源期刊	Climate Dynamics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/145773
作者单位	College of Geography and Environment, Shandong Normal University, Jinan, 250014, China; MOE, Key Laboratory for Coast and Island Development, School of Geographic and Oceanographic Sciences, Nanjing University, Nanjing, 210093, China; Institute of Tibetan Plateau and Polar Meteorology, Chinese Academy of Meteorological Sciences, Beijing, 100081, China
推荐引用方式 GB/T 7714	Wang Y.,Hou S.,Ding M.,et al. On the performance of twentieth century reanalysis products for Antarctic snow accumulation[J],2020,54(2020-01-02).
APA	Wang Y.,Hou S.,Ding M.,&Sun W..(2020).On the performance of twentieth century reanalysis products for Antarctic snow accumulation.Climate Dynamics,54(2020-01-02).
MLA	Wang Y.,et al."On the performance of twentieth century reanalysis products for Antarctic snow accumulation".Climate Dynamics 54.2020-01-02(2020).