气候变化领域集成服务门户(CCPortal): A 131-year evidence of more extreme and higher total amount of hourly precipitation in Hong Kong

CCPortal

DOI	10.1088/1748-9326/ad21b1
	A 131-year evidence of more extreme and higher total amount of hourly precipitation in Hong Kong
	Lai, Yangchen; Li, Jianfeng; Lee, Tsz-cheung; Tse, Wai-Po; Chan, Faith Ka Shun; Chen, Yongqin David; Gu, Xihui
发表日期	2024
ISSN	1748-9326
起始页码	19
结束页码	3
卷号	19 期号:3
英文摘要	Based on the observations of hourly precipitation for 131 years from Hong Kong Observatory Headquarters, this study examined the long-term changes in the characteristics of hourly precipitation extremes in terms of intensity, total precipitation amount, duration, and frequency. Results show that the hourly precipitation extremes have significantly intensified by 29%-38% from 1885 to 2022. The 131-year observations evidence that the more extreme the hourly precipitation is (i.e. higher percentiles), the faster the increasing rate it has. Specifically, the magnitudes of hourly precipitation with the 95th, 97.5th, 99th, and 99.9th percentiles increased by rates of 0.03 mm, 0.05 mm, 0.07 mm, and 0.12 mm per year, respectively. Through the secular trend analysis, we found that only the maximum intensity of extreme precipitation events (i.e. events with maximum intensity exceeding the 95th percentiles) shows a significant increasing trend during 1885-2022, while the trends in the total precipitation amount, duration, and mean intensity are not significant. However, by comparing the percentile bin values between three sub-periods of the 131-year record, we found a significant rise over time in the total precipitation amount, mean intensity, and maximum intensity of extreme precipitation events with different intensities (i.e. 95th, 96th, 97th, 98th, and 99th percentiles), while the change in the duration is not significant. The analysis of the frequency of precipitation events shows significant increases in the proportion of extreme precipitation events during 1885-2022. The observations of 53 stations across Hong Kong from 1986 to 2022 show significant intensification and increasing frequency in the hourly precipitation extremes in most areas of Hong Kong. Meanwhile, the precipitation duration shows a decreasing tendency, which may explain the insignificant changes in the total precipitation amount. These findings provide important insights into the longer-term variations in the characteristics of hourly precipitation extremes.
英文关键词	hourly precipitation extremes; long-term observations; intensity; duration; temporal changes; climate change
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS类目	Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:001162934500001
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/304474
作者单位	Hong Kong Baptist University; Hong Kong Baptist University; Hong Kong Baptist University; University of Nottingham Ningbo China; University of Leeds; University of Leeds; The Chinese University of Hong Kong, Shenzhen; Chinese University of Hong Kong; China University of Geosciences
推荐引用方式 GB/T 7714	Lai, Yangchen,Li, Jianfeng,Lee, Tsz-cheung,et al. A 131-year evidence of more extreme and higher total amount of hourly precipitation in Hong Kong[J],2024,19(3).
APA	Lai, Yangchen.,Li, Jianfeng.,Lee, Tsz-cheung.,Tse, Wai-Po.,Chan, Faith Ka Shun.,...&Gu, Xihui.(2024).A 131-year evidence of more extreme and higher total amount of hourly precipitation in Hong Kong.ENVIRONMENTAL RESEARCH LETTERS,19(3).
MLA	Lai, Yangchen,et al."A 131-year evidence of more extreme and higher total amount of hourly precipitation in Hong Kong".ENVIRONMENTAL RESEARCH LETTERS 19.3(2024).