干旱区生态环境知识资源中心(Arid): Vegetation dynamics and their effects on surface water-energy balance over the Three-North Region of China

Arid

DOI	10.1016/j.agrformet.2019.05.012
	Vegetation dynamics and their effects on surface water-energy balance over the Three-North Region of China
	Deng, Cuiling 1; Zhang, Baoqing 1; Cheng, Linyin 3; Hu, Leiqiu 4; Chen, Fahu1,2
通讯作者	Zhang, Baoqing
来源期刊	AGRICULTURAL AND FOREST METEOROLOGY
ISSN	0168-1923
EISSN	1873-2240
出版年	2019
卷号	275 页码:79-90
英文摘要	The Three-North Shelterbelt Project (TNSP) is one of the largest ecological restoration projects of the world. Although its important role in regulating the ecosystem of northern China has been acknowledged, how this project affects the surface water-energy balance deserves further evaluation. This study characterizes spatiotemporal variation of climate variables and vegetation coverage/density over the Three-North Region (TNR) of China using multiple datasets since the implementation of the TNSP. Of particular importance is that effects of vegetation restored during the TNSP on surface water-energy budget are examined for the study domain. Our results show that accompanied by a significant enhancement of vegetation coverage and density in the TNR, its annual air temperature and precipitation have increased 1.46 degrees C and 89.1 mm, respectively from 1982 to 2015. We find such rise in the air temperature and precipitation plays a positive role in the TNR's vegetation restoration in a sense that the vegetation dynamics show positive correlation with its regional air temperature and precipitation, while more sensitive to precipitation. We also find carbon sequestration of the TNR increases at the cost of greater water consumption through evapotranspiration since the TNSP commences. In some arid regions, revegetation accelerates the water deficit due to an excessive rate of restoring vegetation; yet, no substantial water imbalance occurs as a result of enhanced precipitation and water use efficiency during this period. Although the solar radiation increases with decreases in surface albedo over the last few decades, our results do not reveal an appreciably increasing trend in the land surface temperature of the TNR. This is because the improved vegetation can assimilate CO2 (mitigating greenhouse gas emissions) and transpire water by photosynthesis, thereby increasing latent heat flux and reducing the warming effect. This study highlights a mixed consequence of the TNSP by inducing both positive and negative effects on the surface water-energy balance over the TNR.
英文关键词	Vegetation restoration Evapotranspiration Water-energy balance Water use efficiency Water-carbon trade-off
类型	Article
语种	英语
国家	Peoples R China ; USA
收录类别	SCI-E
WOS记录号	WOS:000480376400008
WOS关键词	LEAF-AREA INDEX ; NET PRIMARY PRODUCTIVITY ; EXTREME NATURAL DROUGHT ; CLIMATE-CHANGE ; LOESS PLATEAU ; FOREST REGION ; RIVER-BASIN ; LAND ; EVAPOTRANSPIRATION ; PRECIPITATION
WOS类目	Agronomy ; Forestry ; Meteorology & Atmospheric Sciences
WOS研究方向	Agriculture ; Forestry ; Meteorology & Atmospheric Sciences
来源机构	兰州大学 ; 中国科学院青藏高原研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/213962
作者单位	1.Lanzhou Univ, Coll Earth & Environm Sci, Minist Educ, Key Lab Western Chinas Environm Syst, Lanzhou 730000, Gansu, Peoples R China; 2.Chinese Acad Sci, CAS Ctr Excellence Tibetan Plateau Earth Sci, Inst Tibetan Plateau Res, Key Lab Alpine Ecol LAE, Beijing 10010, Peoples R China; 3.Univ Arkansas, Dept Geosci, Fayetteville, AR 72701 USA; 4.Univ Alabama, Dept Atmospher Sci, Huntsville, AL 35899 USA
推荐引用方式 GB/T 7714	Deng, Cuiling,Zhang, Baoqing,Cheng, Linyin,et al. Vegetation dynamics and their effects on surface water-energy balance over the Three-North Region of China[J]. 兰州大学, 中国科学院青藏高原研究所,2019,275:79-90.
APA	Deng, Cuiling,Zhang, Baoqing,Cheng, Linyin,Hu, Leiqiu,&Chen, Fahu.(2019).Vegetation dynamics and their effects on surface water-energy balance over the Three-North Region of China.AGRICULTURAL AND FOREST METEOROLOGY,275,79-90.
MLA	Deng, Cuiling,et al."Vegetation dynamics and their effects on surface water-energy balance over the Three-North Region of China".AGRICULTURAL AND FOREST METEOROLOGY 275(2019):79-90.