globalchange  > 气候变化与战略
DOI: 10.5194/tc-14-3195-2020
论文题名:
How much snow falls in the world's mountains? A first look at mountain snowfall estimates in A-train observations and reanalyses
作者: Sophie Daloz A.; Mateling M.; L'ecuyer T.; Kulie M.; Wood N.B.; Durand M.; Wrzesien M.; Stjern C.W.; Dimri A.P.
刊名: Cryosphere
ISSN: 19940416
出版年: 2020
卷: 14, 期:9
起始页码: 3195
结束页码: 3207
语种: 英语
英文关键词: alpine environment ; CloudSat ; estimation method ; mountain region ; observational method ; snowpack ; Africa ; Eurasia ; North America ; South America
英文摘要: CloudSat estimates that 1773 km3 of snow falls, on average, each year over the world's mountains. This amounts to 5% of the global snowfall accumulations. This study synthetizes mountain snowfall estimates over the four continents containing mountains (Eurasia, North America, South America and Africa), comparing snowfall estimates from a new satellite cloud-radar-based dataset to those from four widely used reanalyses: Modern-Era Retrospective analysis for Research and Applications (MERRA), MERRA-2, Japanese 55-year Reanalysis (JRA-55), and European Center for Medium-Range Weather Forecasts Re-Analysis (ERAInterim). Globally, the fraction of snow that falls in the world's mountains is very similar between all these independent datasets (4 %-5 %), providing confidence in this estimate. The fraction of snow that falls in the mountains compared to the continent as a whole is also very similar between the different datasets. However, the total of snow that falls globally and over each continent - the critical factor governing freshwater availability in these regions - varies widely between datasets. The consensus in fractions and the dissimilarities in magnitude could indicate that large-scale forcings may be similar in the five datasets, while local orographic enhancements at smaller scales may not be captured. This may have significant implications for our ability to diagnose regional trends in snowfall and its impacts on snowpack in rapidly evolving alpine environments. © Author(s) 2020.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/164592
Appears in Collections:气候变化与战略

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作者单位: Space Science and Engineering Center (SSEC), University of Wisconsin-Madison, 1225 West Dayton Street, Madison, WI 53706, United States; Center for Climatic Research (CCR), University of Wisconsin-Madison, 1225 West Dayton Street, Madison, WI 53706, United States; Center for International Climate Research (CICERO), Gaustadalleen 21, Oslo, 0349, Norway; Department of Atmospheric and Oceanic Sciences (AOS), University of Wisconsin-Madison, 1225 West Dayton Street, Madison, WI 53706, United States; NOAA/NESDIS/STAR/Advanced Satellite Products Branch, 1225 West Dayton Street, Madison, WI 53706, United States; School of Earth Sciences and Byrd Polar and Climate Research Center, Ohio State University, 108 Scott Hall, 1090 Carmack Rd, Columbus, OH 43210, United States; Hydrological Sciences Laboratory, NASA Goddard Space Flight Center, Greenbelt, MD 20771, United States; GESTAR, Universities Space Research Association, Columbia, MD 21046, United States; School of Environmental Sciences, Jawaharlal Nehru University, New Delhi, 110067, India

Recommended Citation:
Sophie Daloz A.,Mateling M.,L'ecuyer T.,et al. How much snow falls in the world's mountains? A first look at mountain snowfall estimates in A-train observations and reanalyses[J]. Cryosphere,2020-01-01,14(9)
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