DOI: 10.1002/2017JD028004
Scopus记录号: 2-s2.0-85045181839
论文题名: Aerosol and Urban Land Use Effect on Rainfall Around Cities in Indo-Gangetic Basin From Observations and Cloud Resolving Model Simulations
作者: Sarangi C. ; Tripathi S.N. ; Qian Y. ; Kumar S. ; Ruby Leung L.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2018
卷: 123, 期: 7 起始页码: 3645
结束页码: 3667
语种: 英语
英文关键词: aerosol
; cloud invigoration
; Gangetic Basin
; microphysics
; rainfall
; urban land use
Scopus关键词: aerosol
; atmospheric convection
; climate modeling
; cloud microphysics
; convergence
; heat island
; land cover
; land use
; metropolitan area
; observational method
; rainfall
; India
; Kanpur
; Uttar Pradesh
英文摘要: Coupling of urban land use land cover (LULC) and aerosol loading on rainfall around cities in the Gangetic Basin (GB) is examined here. Long-term observations illustrate more rainfall at urban core and climatological downwind regions compared to the upwind regions of Kanpur, a metropolitan area located in central GB. In addition, analysis of a 15 day cloud resolving simulation using the Weather Research and Forecasting model also illustrated similar rainfall pattern around other major cities in the GB. Interestingly, the enhancement of downwind rainfall was greater than that over urban regions, and it was positively associated with both the urban area of the city and ambient aerosol loading during the propagating storm. Further, to gain a process-level understanding, a typical storm that propagated northwestward across Kanpur was simulated using Weather Research and Forecasting under three different scenarios. Case 1 has realistic LULC representation of Kanpur, while the grids representing the Kanpur urban region were replaced by cropland LULC pattern in Case 2. Comparison illustrated that urban heat island effect caused convergence of winds and moisture in the lower troposphere, which enhances convection over urban region and induced more rainfall over the urban core compared to upwind regions. Case 3 is similar to Case 1 but lower aerosol concentration (by a factor of 100) over the storm region. Analysis shows that aerosol-induced microphysical changes delay the initiation of warm rain (over the upwind region) but enhance ice phase particle formation in latter stages (over the urban and downwind regions) resulting in increase in downwind rainfall. ©2018. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114091
Appears in Collections: 气候减缓与适应
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作者单位: Department of CIVIL Engineering, Indian Institute of Technology, Kanpur, India; Atmospheric Sciences and Global Change Division, Pacific Northwest National Laboratory, Richland, WA, United States; Centre for Environmental Science and Engineering, Indian Institute of Technology, Kanpur, India
Recommended Citation:
Sarangi C.,Tripathi S.N.,Qian Y.,et al. Aerosol and Urban Land Use Effect on Rainfall Around Cities in Indo-Gangetic Basin From Observations and Cloud Resolving Model Simulations[J]. Journal of Geophysical Research: Atmospheres,2018-01-01,123(7)