干旱区生态环境知识资源中心(Arid): Effects of Climate Factors and Human Activities on the Ecosystem Water Use Efficiency throughout Northern China

Arid

DOI	10.3390/rs11232766
	Effects of Climate Factors and Human Activities on the Ecosystem Water Use Efficiency throughout Northern China
	Du, Xiaozheng 1; Zhao, Xiang 1,2; Zhou, Tao 3; Jiang, Bo 1,2; Xu, Peipei 4; Wu, Donghai 5; Tang, Bijian 6,7
通讯作者	Zhao, Xiang
来源期刊	REMOTE SENSING
EISSN	2072-4292
出版年	2019
卷号	11 期号:23
英文摘要	Global climate changes have increased the imbalance of water resources, especially in northern China, which comprises typical arid and semiarid regions. Large-scale afforestation has been implemented over the past three decades in northern China. The ecosystem water use efficiency (WUE) connects the carbon cycle and water cycle of the terrestrial ecosystems and is defined as the ratio of the gross primary productivity (GPP) to the evapotranspiration. However, there are still an insufficient number of studies on the impact of the afforestation on the WUE. In this study, we applied the random forest (RF) model to explore the impacts of climate and nonclimate factors on the WUE in northern China. The results showed that in areas with high precipitation, the forests had the highest WUE, while in the arid areas, the croplands had the highest WUE. Of the total area, 44.34% showed a significant increase, and 5.89% showed a significant decrease in the WUE from 1982-2015 in northern China. The main driving factors for the changes in the WUE were climate factors, including the precipitation, temperature and solar radiation, which contributed to approximately 84% of the WUE trends, while human activities, such as afforestation, contributed to approximately 16% of the WUE trends. Overall, although the climate had a larger impact on the WUE dynamics than the human activities, our results suggested that the impacts of the afforestation programs on forest carbon and water cycles should be considered in the context of climate change.
英文关键词	WUE spatiotemporal dynamic afforestation random forest GLASS MODIS
类型	Article
语种	英语
国家	Peoples R China
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000508382100047
WOS关键词	LAND-USE CHANGE ; LOESS PLATEAU ; TERRESTRIAL ECOSYSTEMS ; TEMPORAL PATTERNS ; GLOBAL PATTERNS ; DRIVING FORCES ; CARBON-DIOXIDE ; RANDOM FORESTS ; DROUGHT ; VARIABILITY
WOS类目	Environmental Sciences ; Geosciences, Multidisciplinary ; Remote Sensing ; Imaging Science & Photographic Technology
WOS研究方向	Environmental Sciences & Ecology ; Geology ; Remote Sensing ; Imaging Science & Photographic Technology
EI主题词	2019-12-01
来源机构	北京师范大学 ; 北京大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/311230
作者单位	1.Beijing Normal Univ, State Key Lab Remote Sensing Sci, Beijing 100875, Peoples R China; 2.Chinese Acad Sci, Inst Remote Sensing & Digital Earth, Beijing 100875, Peoples R China; 3.Beijing Normal Univ, Beijing Engn Res Ctr Global Land Remote Sensing P, Inst Remote Sensing Sci & Engn, Fac Geog Sci, Beijing 100875, Peoples R China; 4.Beijing Normal Univ, Fac Geog Sci, State Key Lab Earth Surface Proc & Resource, Beijing 100875, Peoples R China; 5.Anhui Normal Univ, Sch Geog & Tourism, Wuhu 241002, Peoples R China; 6.Peking Univ, Coll Urban & Environm Sci, Beijing 100871, Peoples R China; 7.Hong Kong Univ Sci & Technol, Div Environm & Sustainabil, Kowloon, Hong Kong 999077, Peoples R China
推荐引用方式 GB/T 7714	Du, Xiaozheng,Zhao, Xiang,Zhou, Tao,et al. Effects of Climate Factors and Human Activities on the Ecosystem Water Use Efficiency throughout Northern China[J]. 北京师范大学, 北京大学,2019,11(23).
APA	Du, Xiaozheng.,Zhao, Xiang.,Zhou, Tao.,Jiang, Bo.,Xu, Peipei.,...&Tang, Bijian.(2019).Effects of Climate Factors and Human Activities on the Ecosystem Water Use Efficiency throughout Northern China.REMOTE SENSING,11(23).
MLA	Du, Xiaozheng,et al."Effects of Climate Factors and Human Activities on the Ecosystem Water Use Efficiency throughout Northern China".REMOTE SENSING 11.23(2019).