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DOI10.1029/2018WR023002
Ecohydrological Processes Explain Urban Dry Island Effects in a Wet Region, Southern China
Hao, Lu1; Huang, Xiaolin1; Qin, Mengsheng1; Liu, Yongqiang2; Li, Wenhong3; Sun, Ge4
2018-09-01
发表期刊WATER RESOURCES RESEARCH
ISSN0043-1397
EISSN1944-7973
出版年2018
卷号54期号:9页码:6757-6771
文章类型Article
语种英语
国家Peoples R China; USA
英文摘要

Conversion of agricultural lands to urban uses affects regional and global climate not only through the release of greenhouse gases but also through altering land surface physical processes such as energy and water balances. Most existing studies on the meteorological impacts of urbanization focus on urban heat island effects with little attention on its impacts of atmospheric humidity, a key variable in hydrometeorology and climate science. We define the influences of urbanization on reducing atmospheric humidity and elevating vapor pressure deficit as urban dry island (UDI) effects. We conduct a case study in the Yangtze River Delta, a typical humid area in southern China that is under rapid urbanization. We examine spatiotemporal characteristics of UDI and identify potential drivers during 2001-2014. Relationships and interactions between variations of air temperature, atmospheric humidity, evapotranspiration, and leaf area index of different land cover were determined using correlation and attribution analyses at both station and regional levels. We show that atmospheric humidity decreased dramatically and vapor pressure deficit increased sharply in the urban core, resulting in enhanced UDI. In addition to global warming and localized urban heat island, UDI is closely related to the loss of vegetation cover (i.e., natural wetlands and paddies). Reduction of evapotranspiration or latent heat is another important factor contributing to UDI effects. We conclude that the role of vegetated land cover and associated ecohydrological processes in moderating UDI and maintaining a stable climate and environment should be considered in massive urban planning and global change impact assessment in southern China.


英文关键词urban dry island ecohydrological processes land use and land cover change atmospheric humidity vapor pressure deficit wet region
领域资源环境
收录类别SCI-E
WOS记录号WOS:000448088100051
WOS关键词AIR-TEMPERATURE ; WATER YIELD ; LAND-USE ; CLIMATE ; EVAPOTRANSPIRATION ; ENERGY ; URBANIZATION ; TRENDS ; PRECIPITATION ; DEFORESTATION
WOS类目Environmental Sciences ; Limnology ; Water Resources
WOS研究方向Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources
引用统计
文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/21411
专题资源环境科学
作者单位1.Nanjing Univ Informat Sci & Technol, Key Lab Meteorol Disaster, Joint Int Res Lab Climate & Environm Change, Minist Educ,Jiangsu Key Lab Agr Meteorol, Nanjing, Jiangsu, Peoples R China;
2.US Forest Serv, Ctr Forest Disturbance Sci, Southern Res Stn, USDA, Athens, GA USA;
3.Duke Univ, Nicholas Sch Environm, Earth & Ocean Sci, Durham, NC 27708 USA;
4.US Forest Serv, Eastern Forest Environm Threat Assessment Ctr, Southern Res Stn, USDA, Res Triangle Pk, NC 27709 USA
推荐引用方式
GB/T 7714
Hao, Lu,Huang, Xiaolin,Qin, Mengsheng,et al. Ecohydrological Processes Explain Urban Dry Island Effects in a Wet Region, Southern China[J]. WATER RESOURCES RESEARCH,2018,54(9):6757-6771.
APA Hao, Lu,Huang, Xiaolin,Qin, Mengsheng,Liu, Yongqiang,Li, Wenhong,&Sun, Ge.(2018).Ecohydrological Processes Explain Urban Dry Island Effects in a Wet Region, Southern China.WATER RESOURCES RESEARCH,54(9),6757-6771.
MLA Hao, Lu,et al."Ecohydrological Processes Explain Urban Dry Island Effects in a Wet Region, Southern China".WATER RESOURCES RESEARCH 54.9(2018):6757-6771.
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