globalchange  > 过去全球变化的重建
DOI: 10.1007/s00382-015-2745-4
Scopus记录号: 2-s2.0-84973908601
论文题名:
Effects of urban land-use change in East China on the East Asian summer monsoon based on the CAM5.1 model
作者: Ma H.; Jiang Z.; Song J.; Dai A.; Yang X.; Huo F.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2016
卷: 46, 期:2017-09-10
起始页码: 2977
结束页码: 2989
语种: 英语
英文关键词: East Asian summer monsoon ; East China ; Numerical simulation ; Precipitation ; Urban land-use change
英文摘要: The effects of urban land-use change in East China on the East Asian summer monsoon (EASM) are investigated using a Community Atmosphere Model Version 5.1. The results show that the urban land-use change in East China causes spatially-varying changes in surface net radiation and heat fluxes, atmospheric circulation, and water budgets. It results in significant surface warming (cooling) and precipitation decrease (increase) in a large region north (south) of 30°N. Urban expansion agglomerated in (29°–41°N, 110°–122°E) alters the surface energy budget and warms the surface, resulting in strengthened southwesterly airflow south of 25°N and increased convergence below the mid-troposphere between 20° and 30°N. A concomitant northward downdraft associated with the increased convection generates an anomalous high pressure north of 30°N. Meanwhile, the downdraft not only produces adiabatic warming but also inhibits the dynamic condition for precipitation formation. The anomalous high pressure formed in North China prevents the southwesterly airflow from advancing northward, leading to increase the convergence and precipitation in South China. These changes reduce the meridional temperature gradient in the mid-lower troposphere and weaken the westerly airflow near 30°N. In addition, horizontal transport of vorticity north of 35°N weakens significantly, which leads to an anomalous barotropic structure of anticyclonic there. As a result, the anomalous anticyclonic circulation and descent north of 30°N are strengthened. At the same time, the anomalous cyclonic circulation and ascent south of 30°N are enhanced. These process induced by the thermal state changes due to urbanization weakens the EASM. © 2015, Springer-Verlag Berlin Heidelberg.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/53745
Appears in Collections:过去全球变化的重建

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作者单位: Key Laboratory of Meteorological Disaster of Ministry of Education, Nanjing University of Information Science and Technology, Nanjing, Jiangsu, China; College of Atmospheric Sciences, Nanjing University of Information Science and Technology, 219 Ning Liu Road, Nanjing, Jiangsu, China; Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science and Technology, Nanjing, Jiangsu, China; Department of Geography, Northern Illinois University, DeKalb, IL, United States; Department of Atmospheric and Environmental Sciences, University at Albany, SUNY, Albany, NY, United States; National Center for Atmospheric Research, Boulder, CO, United States; School of Atmospheric Sciences, Nanjing University, Nanjing, Jiangsu, China

Recommended Citation:
Ma H.,Jiang Z.,Song J.,et al. Effects of urban land-use change in East China on the East Asian summer monsoon based on the CAM5.1 model[J]. Climate Dynamics,2016-01-01,46(2017-09-10)
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