气候变化领域集成服务门户(CCPortal): Changes in observed daily precipitation over global land areas since 1950

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DOI	10.1175/JCLI-D-19-0965.1
	Changes in observed daily precipitation over global land areas since 1950
	Contractor S.; Donat M.G.; Alexander L.V.
发表日期	2021
ISSN	0894-8755
起始页码	3
结束页码	19
卷号	34 期号:1
英文摘要	Estimates of observed long-term changes in daily precipitation globally have been limited due to availability of high-quality observations. In this study, a new gridded dataset of daily precipitation, called Rainfall Estimates on a Gridded Network (REGEN) V1-2019, was used to perform an assessment of the climatic changes in precipitation at each global land location (except Antarctica). This study investigates changes in the number of wet days ($1 mm) and the entire distribution of daily wet- and all-day records, in addition to trends in annual and seasonal totals from daily records, between 1950 and 2016. The main finding of this study is that precipitation has intensified across a majority of land areas globally throughout the wet-day distribution. This means that when it rains, light, moderate, or heavy wet-day precipitation has become more intense across most of the globe. Widespread increases in the frequency of wet days are observed across Asia and the United States, and widespread increases in the precipitation intensity are observed across Europe and Australia. Based on a comparison of spatial pattern of changes in frequency, intensity, and the distribution of daily totals, we propose that changes in light and moderate precipitation are characterized by changes in precipitation frequency, whereas changes in extreme precipitation are primarily characterized by intensity changes. Based on the uncertainty estimates from REGEN, this study highlights all results in the context of grids with high-quality observations. © 2020 American Meteorological Society. For information regarding reuse of this content and general copyright information, consult the AMS Copyright Policy (www.ametsoc.org/PUBSReuseLicenses).
英文关键词	Rain; Daily precipitations; Extreme precipitation; High-quality observations; Long term change; Precipitation frequency; Precipitation intensity; Rainfall estimates; Uncertainty estimates; Uncertainty analysis; climate change; climate variation; extreme event; land surface; precipitation intensity; Asia; Australia; Europe; United States
语种	英语
来源期刊	Journal of Climate
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/170971
作者单位	School of Mathematics and Statistics, University of New South Wales Sydney, Sydney, NSW, Australia; Barcelona Supercomputing Centre, Barcelona, Spain; Climate Change Research Centre, ARC Centre of Excellence for Climate Extremes, University of New South Wales Sydney, Sydney, NSW, Australia
推荐引用方式 GB/T 7714	Contractor S.,Donat M.G.,Alexander L.V.. Changes in observed daily precipitation over global land areas since 1950[J],2021,34(1).
APA	Contractor S.,Donat M.G.,&Alexander L.V..(2021).Changes in observed daily precipitation over global land areas since 1950.Journal of Climate,34(1).
MLA	Contractor S.,et al."Changes in observed daily precipitation over global land areas since 1950".Journal of Climate 34.1(2021).