Asymmetrical Shift Toward Less Light and More Heavy Precipitation in an Urban Agglomeration of East China: Intensification by Urbanization

被引：65

作者：

Yu, Xiaojie ^{[1
,2
]}

Gu, Xihui ^{[1
,3
,4
]}

Kong, Dongdong ^{[1
]}

Zhang, Qiang ^{[5
,6
,7
]}

Cao, Qian ^{[8
]}

Slater, Louise J. ^{[4
]}

Ren, Guoyu ^{[1
,9
]}

Luo, Ming ^{[10
,11
]}

Li, Jianfeng ^{[12
]}

Liu, Jianyu ^{[13
]}

Cheng, Jianmei ^{[2
]}

Li, Yanan ^{[14
,15
]}

机构：

[1] China Univ Geosci, Dept Atmospher Sci, Sch Environm Studies, Wuhan, Peoples R China

[2] China Univ Geosci, Sch Environm Studies, Dept Water Resources & Hydrogeol, Wuhan, Peoples R China

[3] Wuhan Univ, State Key Lab Water Resources & Hydropower Engn S, Wuhan, Peoples R China

[4] Univ Oxford, Sch Geog & Environm, Oxford, England

[5] Beijing Normal Univ, Minist Educ, Key Lab Environm Change & Nat Disaster, Beijing, Peoples R China

[6] Beijing Normal Univ, Minist Civil Affairs, Minist Educ, Acad Disaster Reduct & Emergency Management,Fac G, Beijing, Peoples R China

[7] Beijing Normal Univ, State Key Lab Earth Surface Proc & Resources Ecol, Beijing, Peoples R China

[8] China Univ Geosci, Sch Geog & Informat Engn, Wuhan, Peoples R China

[9] China Meteorol Adm, Natl Climate Ctr, Lab Climate Studies, Beijing, Peoples R China

[10] Sun Yat Sen Univ, Sch Geog & Planning, Guangzhou, Peoples R China

[11] Sun Yat Sen Univ, Guangdong Key Lab Urbanizat & Geosimulat, Guangzhou, Peoples R China

[12] Hong Kong Baptist Univ, Dept Geog, Hong Kong, Peoples R China

[13] China Univ Geosci, Sch Geog & Informat Engn, Hubei Key Lab Crit Zone Evolut, Wuhan, Peoples R China

[14] Zhengzhou Tourism Coll, Zhengzhou, Peoples R China

[15] Henan Univ, Key Lab Geospatial Technol Middle & Lower Yellow, Coll Environm & Planning, Kaifeng, Peoples R China

来源：

GEOPHYSICAL RESEARCH LETTERS | 2022年 / 49卷 / 04期

基金：

中国国家自然科学基金;

关键词：

asymmetrical shift; light precipitation; heavy precipitation; urbanization; Yangtze River Delta; EXTREME PRECIPITATION; RELATIVE-HUMIDITY; FUTURE CHANGES; CLIMATE-CHANGE; RAINFALL; TRENDS; EVAPOTRANSPIRATION; INTENSITY; INCREASES; FREQUENCY;

D O I：

10.1029/2021GL097046

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Under global warming, projected changes in precipitation have shown an asymmetrical shift from light to heavy precipitation over China. However, the role of urbanization in this shift remains unknown. Here, we show that increases in total rainy-season (May-September) precipitation over the Yangtze River Delta (YRD) urban agglomeration of East China are characterized by decreasing light precipitation and increasing heavy precipitation during 1961-2019. This asymmetrical shift toward heavier precipitation is even more prominent in urban than rural areas. Areas with faster urban expansion rates exhibit stronger negative (positive) trends in light (heavy) precipitation. Urbanization contributes to 44.4% (26.4%) of the decreasing (increasing) light (heavy) precipitation in the urban areas of the YRD. We suggest that urban managers should consider potential adverse impacts of this asymmetrical shift, which may favor increases in both the frequency of heatwaves and waterlogging.

引用

页数：12

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