气候变化领域集成服务门户(CCPortal): Intensity-duration-frequency curves at the global scale

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DOI	10.1088/1748-9326/ab370a
	Intensity-duration-frequency curves at the global scale
	Courty L.G.; Wilby R.L.; Hillier J.K.; Slater L.J.
发表日期	2019
ISSN	17489318
卷号	14 期号:8
英文摘要	Intensity-duration-frequency (IDF) curves usefully quantify extreme precipitation over various durations and return periods for engineering design. Unfortunately, sparse, infrequent, or short observations hinder the creation of robust IDF curves in many locations. This paper presents the first global, multi-temporal (1-360 h) dataset of generalized extreme value (GEV) parameters at 31 km resolution dubbed PXR-2 (Parametrized eXtreme Rain). Using these data we generalize site-specific studies to show that that GEV parameters typically scale robustly with event duration (r 2 > 0.88). Thus, we propose a universal IDF formula that allows estimates of rainfall intensity for a continuous range of durations (PXR-4). This parameter scaling property opens the door to estimating sub-daily IDF from daily records. We evaluate this characteristic for selected global cities and a high-density rain gauge network in the United Kingdom. We find that intensities estimated with PXR-4 are within +20% of PXR-2 for durations ranging between 2 and 360 h. PXR is immediately usable by earth scientists studying global precipitation extremes and a promising proof-of-concept for engineers designing infrastructure in data-scarce regions. © 2019 The Author(s). Published by IOP Publishing Ltd.
英文关键词	design rainfall; ERA5, reanalysis; frequency analysis; precipitation
语种	英语
scopus关键词	Precipitation (chemical); Rain gages; Design rainfalls; Extreme precipitation; Frequency Analysis; Generalized extreme value; Global precipitation; Intensity-duration-frequency curves; Rain gauge networks; Reanalysis; Rain; design; extreme event; frequency analysis; parameter estimation; precipitation assessment; precipitation intensity; raingauge; return period
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/154418
作者单位	Department of Geography and Environment, Loughborough UniversityLE11 3TU, United Kingdom; Mexican Institute of Water Technology, Jiutepec Morelos, 62550, Mexico; School of Geography and Environment, University of OxfordOX1 3QY, United Kingdom
推荐引用方式 GB/T 7714	Courty L.G.,Wilby R.L.,Hillier J.K.,et al. Intensity-duration-frequency curves at the global scale[J],2019,14(8).
APA	Courty L.G.,Wilby R.L.,Hillier J.K.,&Slater L.J..(2019).Intensity-duration-frequency curves at the global scale.Environmental Research Letters,14(8).
MLA	Courty L.G.,et al."Intensity-duration-frequency curves at the global scale".Environmental Research Letters 14.8(2019).