DOI: 10.1002/2016JD025564
论文题名: Potential impacts of urban land expansion on Asian airborne pollutant outflows
作者: Tao W. ; Liu J. ; Ban-Weiss G.A. ; Zhang L. ; Zhang J. ; Yi K. ; Tao S.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2017
卷: 122, 期: 14 起始页码: 7646
结束页码: 7663
语种: 英语
英文关键词: air pollution
; black carbon
; land use change
; trans-Pacific transport
; urbanization
英文摘要: Eastern part of China (EPC) has experienced rapid urbanization during the past few decades. Here we investigate the impacts of urban land expansion over EPC on the export of Asian pollutants to the western Pacific during January, April, July, and October of 2009 using the Weather Research and Forecasting model coupled to Chemistry (WRF/Chem) and a single-layer urban canopy scheme. Over urbanizing areas, increases in the urban land fraction result in a linearly enhanced uplift of surface primary pollutants to higher altitudes. We further examine how this local effect would change outflows of Asian pollutants to the western Pacific using the tagged black carbon (BC) and carbon monoxide (CO) tracers emitted from EPC (denoted by BCt and COt, respectively). Overall, a 0.1 increase in the fraction of land area that is urban over EPC would linearly (R2 = 0.70–0.96) increase the mean tropospheric eastward export of BCt and COt across meridional planes (i.e., 135°E and 150°E) by 4–40% and 1–6% in different months, respectively. The relative perturbation in exporting efficiency generally maximizes during July while minimizes during April. The urbanization-export relationship is largely driven by the elevation effect and is also impacted by urbanization-forced changes in zonal winds. The spatial pattern of the response of BCt over the downwind Pacific differs from that of COt mainly due to aerosol-cloud interactions. Our findings demonstrate that extensive urban land expansion could substantially impact climate and air quality from a local scale to a regional scale, especially for shorter-lived air pollutants such as BC and other aerosols. ©2017. American Geophysical Union. All Rights Reserved. 资助项目: 41390240
; 41571130010
; 41671491
; CBET-1512429
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/62628
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: Laboratory for Earth Surface Processes, College of Urban and Environmental Sciences, Peking University, Beijing, China; Department of Civil and Environmental Engineering, University of Southern California, Los Angeles, CA, United States; Laboratory for Climate and Ocean-Atmosphere Sciences, Department of Atmospheric and Oceanic Sciences, School of Physics, Peking University, Beijing, China
Recommended Citation:
Tao W.,Liu J.,Ban-Weiss G.A.,et al. Potential impacts of urban land expansion on Asian airborne pollutant outflows[J]. Journal of Geophysical Research: Atmospheres,2017-01-01,122(14)