干旱区生态环境知识资源中心(Arid): Effects of urbanization on extreme rainfall in an arid/semiarid region

Arid

DOI	10.1002/asl.966
	Effects of urbanization on extreme rainfall in an arid/semiarid region
	Li, Jialun; Mahalov, Alex; Hyde, Peter
通讯作者	Li, JL
来源期刊	ATMOSPHERIC SCIENCE LETTERS
ISSN	1530-261X
出版年	2020
卷号	21 期号:5
英文摘要	In this study, an extreme rainfall event that occurred mainly on October 2, 2018, in the Phoenix metropolitan area, southwestern United States, is simulated with the Weather Research and Forecasting (WRF) model, version 4.0, with multiple microphysics and boundary layer schemes. Paired simulations are conducted by running the model first using a realistic land cover and land-use dataset (URB run), and second, by replacing the urban land cover with open shrubland cover (called NOURB run). The model simulations are first evaluated against radar Stage IV (hereafter Stage IV) data and multiple radar and multiple sensors (MRMS) rainfall to validate the structure, amplitude, and location (SAL) of the rainfall field for both URB runs and NOURB runs. These evaluation results indicate that the model performance varies considerably depending on the physics schemes employed. Based on SAL values, the average of model simulations captures the main features (values of S, A, and L are less than 0.1) both for URB runs and for NOURB runs. Comparisons of hourly rainfall rates show that modeled rainfall maximums occurred about 1 hr earlier than both Stage IV and MRMS data over the Phoenix metro area, while the maximum rainfall amounts from the model are close to MRMS data but lower than Stage IV data. The differences of rainfall and other meteorological variables between URB runs and NOURB runs are analyzed. The differences of rainfall between URB and NOURB vary depending on the physics scheme employed. Our study also indicates that urbanization-induced rainfall changes are small within the urban area but are significant at some locations outside of it; an explanation for this pattern needs further investigation. This result implies that using a single physics scheme to address the effects of urbanization on extreme rainfall events may result in inappropriate conclusions.
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000531346700003
WOS关键词	BULK MICROPHYSICS PARAMETERIZATION ; NUMERICAL-SIMULATION ; PART II ; PRECIPITATION ; MODEL ; CONVECTION ; IMPACTS ; IMPLEMENTATION ; CLOSURE ; LAYER
WOS类目	Geochemistry & Geophysics ; Meteorology & Atmospheric Sciences
WOS研究方向	Geochemistry & Geophysics ; Meteorology & Atmospheric Sciences
来源机构	Arizona State University
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/324423
作者单位	[Li, Jialun; Mahalov, Alex] Arizona State Univ, Sch Math & Stat Sci, Tempe, AZ 85287 USA; [Mahalov, Alex] Arizona State Univ, Julie Ann Wrigley Global Inst Sustainabil, Tempe, AZ USA; [Hyde, Peter] Arizona State Univ, Sch Engn Matter Transport & Energy, Tempe, AZ USA
推荐引用方式 GB/T 7714	Li, Jialun,Mahalov, Alex,Hyde, Peter. Effects of urbanization on extreme rainfall in an arid/semiarid region[J]. Arizona State University,2020,21(5).
APA	Li, Jialun,Mahalov, Alex,&Hyde, Peter.(2020).Effects of urbanization on extreme rainfall in an arid/semiarid region.ATMOSPHERIC SCIENCE LETTERS,21(5).
MLA	Li, Jialun,et al."Effects of urbanization on extreme rainfall in an arid/semiarid region".ATMOSPHERIC SCIENCE LETTERS 21.5(2020).