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	Numerical simulation of the impact of reforestation on winter meteorology and environment in a semi-arid urban valley, Northwestern China
	Yu, Ye1; He, Jianjun1,2; Zhao, Suping1; Liu, Na1,3; Chen, Jinbei1; Mao, Hongjun2; Wu, Lin2
刊名	SCIENCE OF THE TOTAL ENVIRONMENT
	2016-11-01
卷号	569页码:404-415
关键词	Land use change Air pollution WRF Mountain-valley circulation Complex terrain Lanzhou
ISSN号	0048-9697
DOI	10.1016/j.scitotenv.2016.06.143
通讯作者	Yu, Ye(yyu@lzb.ac.cn) ; He, Jianjun(18766167147@163.com)
英文摘要	Since 1999 Chinese government has made great effort to reforest the south and north mountains surrounding urban Lanzhou - a city located in a river valley, Northwestern China. Until 2009 obvious land use change occurred, with 69.2% of the reforested area been changed from grasslands, croplands, barren or sparsely vegetated land to closed shrublands and 20.6% from closed shrublands, grasslands, and croplands to forests. Reforestation changes land-surface properties, with possible impact on the evolution of atmospheric variables. To understand to what extent the local meteorology and environment could be affected by reforestation in winter, and through what processes, two sets of simulations were conducted using the Weather Research and Forecasting model (WRF) and the FLEXible PARTicle (FLEXPART) dispersion model for a control case with high-resolution remotely sensed land cover data for 2009 and a scenario assuming no reforestation since 1999. Results suggested that the changes in albedo, surface exchange coefficient and surface soil heat conductivity related to reforestation led to the changes in surface net radiation and surface energy partitioning, which in turn affected the meteorological fields and enhanced the mountain-valleywind circulation. Replacement of shrublands and grassland with forest in the south mountain through reforestation play a dominant role in the enhancement of mountain-valley wind circulation. Reforestation increased the amount of air exchanged between the valley and the outside during the day, with the largest hourly increase of 10% on calm weather days and a monthly mean hourly increase of 2% for the study period (Dec. 2009). Reforestation affected the spatial distribution of pollutants and slightly improved the urban air quality, especially in the eastern valley. Results from this study provide useful information for future urban air quality management and reforestation plan, and some experience for cities with similar situations in the world. (C) 2016 Elsevier B.V. All rights reserved.
收录类别	SCI
WOS关键词	DISPERSION MODEL FLEXPART ; WEATHER RESEARCH ; EASTERN CHINA ; UNITED-STATES ; AIR-QUALITY ; WRF MODEL ; LAND-USE ; CLIMATE ; SENSITIVITY ; EXPANSION
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Environmental Sciences
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000382269000043
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2557442
专题	寒区旱区环境与工程研究所
通讯作者	Yu, Ye; He, Jianjun
作者单位	1.Chinese Acad Sci, Clod & Arid Reg Environm & Engn Res Inst, Key Lab Land Surface Proc & Climate Change Cold &, Lanzhou 730000, Peoples R China 2.Nankai Univ, Coll Environm Sci & Engn, Tianjin 300071, Peoples R China 3.Qinghai Meteorol Bur, Weather Modificat Off, Xining 810001, Peoples R China
推荐引用方式 GB/T 7714	Yu, Ye,He, Jianjun,Zhao, Suping,et al. Numerical simulation of the impact of reforestation on winter meteorology and environment in a semi-arid urban valley, Northwestern China[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2016,569:404-415.
APA	Yu, Ye.,He, Jianjun.,Zhao, Suping.,Liu, Na.,Chen, Jinbei.,...&Wu, Lin.(2016).Numerical simulation of the impact of reforestation on winter meteorology and environment in a semi-arid urban valley, Northwestern China.SCIENCE OF THE TOTAL ENVIRONMENT,569,404-415.
MLA	Yu, Ye,et al."Numerical simulation of the impact of reforestation on winter meteorology and environment in a semi-arid urban valley, Northwestern China".SCIENCE OF THE TOTAL ENVIRONMENT 569(2016):404-415.

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