气候变化领域集成服务门户(CCPortal): Intercomparison of annual precipitation indices and extremes over global land areas from in situ, space-based and reanalysis products

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DOI	10.1088/1748-9326/ab79e2
	Intercomparison of annual precipitation indices and extremes over global land areas from in situ, space-based and reanalysis products
	Alexander L.V.; Bador M.; Roca R.; Contractor S.; Donat M.G.; Nguyen P.L.
发表日期	2020
ISSN	17489318
卷号	15 期号:5
英文摘要	A range of in situ, satellite and reanalysis products on a common daily 1° × 1° latitude/longitude grid were extracted from the Frequent Rainfall Observations on Grids database to help facilitate intercomparison and analysis of precipitation extremes on a global scale. 22 products met the criteria for this analysis, namely that daily data were available over global land areas from 50°S to 50°N since at least 2001. From these daily gridded data, 10 annual indices that represent aspects of extreme precipitation frequency, duration and intensity were calculated. Results were analysed for individual products and also for four cluster types: (i) in situ, (ii) corrected satellite, (iii) uncorrected satellite and (iv) reanalyses. Climatologies based on a common 13-year period (2001-2013) showed substantial differences between some products. Timeseries (which ranged from 13 years to 67 years) also highlighted some substantial differences between products. A coefficient of variation showed that the in situ products were most similar to each other while reanalysis products had the largest variations. Reanalyses however agreed better with in situ observations over extra-tropical land areas compared to the satellite clusters, although reanalysis products tended to fall into 'wet' and 'dry' camps overall. Some indices were more robust than others across products with daily precipitation intensity showing the least variation between products and days above 20 mm showing the largest variation. In general, the results of this study show that global space-based precipitation products show the potential for climate scale analyses of extremes. While we recommend caution for all products dependent on their intended application, this particularly applies to reanalyses which show the most divergence across results. © 2020 The Author(s). Published by IOP Publishing Ltd.
英文关键词	global observations; guage-based; intercomparison; precipitation; reanalyses; satellite
语种	英语
scopus关键词	Satellites; Annual precipitation; Daily precipitations; Extreme precipitation; In-situ observations; Precipitation extremes; Precipitation products; Satellite clusters; Tropical land areas; Precipitation (meteorology); comparative study; extraterrestrial feature; extreme event; frequency analysis; in situ measurement; precipitation (climatology); precipitation intensity; satellite data
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/154048
作者单位	Climate Change Research Centre, ARC Centre of Excellence for Climate Extremes, UNSW, Sydney, NSW 2052, Australia; Laboratoire d'Etudes Géophysiques et d'Océanographie Spatiales, Toulouse, France; School of Mathematics and Statistics, UNSW, Sydney, NSW 2052, Australia; Barcelona Supercomputing Center (BSC), Carrer de Jordi Girona 29-31, Barcelona, E-08034, Spain
推荐引用方式 GB/T 7714	Alexander L.V.,Bador M.,Roca R.,et al. Intercomparison of annual precipitation indices and extremes over global land areas from in situ, space-based and reanalysis products[J],2020,15(5).
APA	Alexander L.V.,Bador M.,Roca R.,Contractor S.,Donat M.G.,&Nguyen P.L..(2020).Intercomparison of annual precipitation indices and extremes over global land areas from in situ, space-based and reanalysis products.Environmental Research Letters,15(5).
MLA	Alexander L.V.,et al."Intercomparison of annual precipitation indices and extremes over global land areas from in situ, space-based and reanalysis products".Environmental Research Letters 15.5(2020).