气候变化领域集成服务门户(CCPortal): Impact of Land Surface Processes on a Record-Breaking Rainfall Event on May 06

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DOI	10.1029/2020JD032997
	Impact of Land Surface Processes on a Record-Breaking Rainfall Event on May 06–07, 2017, in Guangzhou, China
	Gao Z.; Zhu J.; Guo Y.; Luo N.; Fu Y.; Wang T.
发表日期	2021
ISSN	2169897X
卷号	126 期号:5
英文摘要	A record-breaking extreme rainfall event with a maximum rainfall amount over 24 h of 524.1 mm occurred in Guangzhou, China, on May 06–07, 2017. To study the impact of land surface processes on this extreme rainfall, two 21-member convective-permitting ensemble forecasts over South China were performed based on two land surface models (LSMs), Noah and Community Land Model (CLM), and 21 forecasting members of the Global Ensemble Forecast System (GEFS). The results showed that, in general, members using the Noah LSM could better simulate urban heat islands (UHIs) and urban convection than members using the CLM LSM in this case. By investigating the ensemble member that most resembled the observations, it was found that the high temperature center in the urban area caused a thermal low in the early stage. As the southerly winds strengthened, the low-level convergence line continued moving northward and eventually triggered convection in the mountainous region. A sensitivity experiment showed that the impact of land surface heterogeneity on precipitation could be reflected on a finer scale, and heavy rainfall was very sensitive to the changes in small-scale land surface forces, including terrain and land use. Slight variations in small-scale land surface conditions caused great responses in the total precipitation, indicating that for the occurrence of such quasi-stationary extreme rainfall, a subtle balance between different atmospheric and land surface factors may be required. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	ensemble forecast; extreme rainfall; land surface processes; small perturbations in land surface conditions; urban heat islands
语种	英语
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/185438
作者单位	State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing Normal University, Beijing, China; Key Laboratory of Cloud-Precipitation Physics and Severe Storms, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China; Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, China
推荐引用方式 GB/T 7714	Gao Z.,Zhu J.,Guo Y.,等. Impact of Land Surface Processes on a Record-Breaking Rainfall Event on May 06–07, 2017, in Guangzhou, China[J],2021,126(5).
APA	Gao Z.,Zhu J.,Guo Y.,Luo N.,Fu Y.,&Wang T..(2021).Impact of Land Surface Processes on a Record-Breaking Rainfall Event on May 06–07, 2017, in Guangzhou, China.Journal of Geophysical Research: Atmospheres,126(5).
MLA	Gao Z.,et al."Impact of Land Surface Processes on a Record-Breaking Rainfall Event on May 06–07, 2017, in Guangzhou, China".Journal of Geophysical Research: Atmospheres 126.5(2021).