气候变化领域集成服务门户(CCPortal): Comparative analysis of snowfall accumulation over Antarctica in light of Ice discharge and gravity observations from space

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DOI	10.1088/1748-9326/ab9926
	Comparative analysis of snowfall accumulation over Antarctica in light of Ice discharge and gravity observations from space
	Behrangi A.; Gardner A.S.; Wiese D.N.
发表日期	2020
ISSN	17489318
卷号	15 期号:10
英文摘要	The remote and cold Antarctic continent presents unique challenges to quantify precipitation rates from space and in situ observations. This has resulted in large uncertainties in current estimates. In this study, we quantify annual precipitation rates over seven Antarctic basins using a novel mass budget (MB) approach, by building on the recent Landsat based estimate of ice discharge and changes in total water storage from GRACE. The MB precipitation rates are compared with those from CloudSat, GPCP, the Arthern precipitation climatology, the GPM constellation sensors, a few popular reanalysis products, and a regional climate model for two periods: 2007–2010 and 2013–2015. The new estimates are bounded by CloudSat precipitation rates with and without adjustment for the unmeasured near surface precipitation. GPM products significantly underestimate Antarctic precipitation rate, but capture spatial variability that is valuable for bias-adjustment. We find variable performance between products at basin scale, suggesting that an in-depth regional study of precipitation rates is necessary. © 2020 The Author(s). Published by IOP Publishing Ltd
英文关键词	Antarctica; CloudSat; GPM; GRACE; Precipitation; Remote sensing
语种	英语
scopus关键词	Budget control; Climate models; Clouds; Annual precipitation; Comparative analysis; In-situ observations; Near surface precipitation; Precipitation climatology; Regional climate modeling; Spatial variability; Variable performance; Uncertainty analysis; climate modeling; CloudSat; comparative study; gravity; Landsat; observational method; precipitation (climatology); spatial variation; spatiotemporal analysis; water storage; Antarctica
来源期刊	Environmental Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/153644
作者单位	Department of Hydrology and Atmospheric Sciences, University of Arizona, Tucson, United States; Department of Geosciences, University of Arizona, Tucson, United States; Jet Propulsion Laboratory, California Institute of Technology, Pasedena, United States
推荐引用方式 GB/T 7714	Behrangi A.,Gardner A.S.,Wiese D.N.. Comparative analysis of snowfall accumulation over Antarctica in light of Ice discharge and gravity observations from space[J],2020,15(10).
APA	Behrangi A.,Gardner A.S.,&Wiese D.N..(2020).Comparative analysis of snowfall accumulation over Antarctica in light of Ice discharge and gravity observations from space.Environmental Research Letters,15(10).
MLA	Behrangi A.,et al."Comparative analysis of snowfall accumulation over Antarctica in light of Ice discharge and gravity observations from space".Environmental Research Letters 15.10(2020).