气候变化领域集成服务门户(CCPortal): Moisture transport in observations and reanalyses as a proxy for snow accumulation in East Antarctica

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DOI	10.5194/tc-13-413-2019
	Moisture transport in observations and reanalyses as a proxy for snow accumulation in East Antarctica
	Dufour A.; Charrondière C.; Zolina O.
发表日期	2019
ISSN	19940416
EISSN	13
起始页码	413
结束页码	425
卷号	13 期号:2
英文摘要	Atmospheric moisture convergence on ice sheets provides an estimate of snow accumulation, which is critical to quantifying sea-level changes. In the case of East Antarctica, we computed moisture transport from 1980 to 2016 in five reanalyses and in radiosonde observations. Moisture convergence in reanalyses is more consistent than net precipitation but still ranges from 72 to 96mmyr-1 in the four most recent reanalyses, ERA-Interim, NCEP CFSR, JRA 55 and MERRA 2. The representation of long-term variability in reanalyses is also inconsistent, which justified resorting to observations. Moisture fluxes are measured on a daily basis via radiosondes launched from a network of stations surrounding East Antarctica. Observations agree with reanalyses on the major role of extreme advection events and transient eddy fluxes. Although assimilated, the observations reveal processes that reanalyses cannot model, some due to a lack of horizontal and vertical resolution, especially the oldest, NCEP DOE R2. Additionally, the observational time series are not affected by new satellite data unlike the reanalyses. We formed pan-continental estimates of convergence by aggregating anomalies from all available stations. We found statistically significant trends neither in moisture convergence nor in precipitable water. © Author(s) 2019.
学科领域	advection; atmospheric moisture; convergence; ice sheet; moisture transfer; precipitation (climatology); radiosonde; sea level change; snow accumulation; Antarctica; East Antarctica
语种	英语
scopus关键词	advection; atmospheric moisture; convergence; ice sheet; moisture transfer; precipitation (climatology); radiosonde; sea level change; snow accumulation; Antarctica; East Antarctica
来源期刊	The Cryosphere
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/118935
作者单位	IGE, Institut des Géosciences de l'Environnement, CNRS/UGA, Grenoble, France; IORAS, P. P. Shirshov Institute of Oceanology, Russian Academy of Science, Moscow, Russian Federation
推荐引用方式 GB/T 7714	Dufour A.,Charrondière C.,Zolina O.. Moisture transport in observations and reanalyses as a proxy for snow accumulation in East Antarctica[J],2019,13(2).
APA	Dufour A.,Charrondière C.,&Zolina O..(2019).Moisture transport in observations and reanalyses as a proxy for snow accumulation in East Antarctica.The Cryosphere,13(2).
MLA	Dufour A.,et al."Moisture transport in observations and reanalyses as a proxy for snow accumulation in East Antarctica".The Cryosphere 13.2(2019).