干旱区生态环境知识资源中心(Arid): Spatiotemporal variations of water use efficiency and its driving factors in Inner Mongolia from 2001 to 2020

Arid

DOI	10.1007/s11442-023-2078-x
	Spatiotemporal variations of water use efficiency and its driving factors in Inner Mongolia from 2001 to 2020
	Mei, Li; Tong, Siqin; Yin, Shan; Bao, Yuhai; Huang, Xiaojun; Alateng, Tuya; Wang, Yongfang; Guo, Enliang; Yuan, Zhihui; Nashun, Dalai; Gao, Suriguga; Liu, Xinyi; Ye, Zhigang
通讯作者	Tong, SQ
来源期刊	JOURNAL OF GEOGRAPHICAL SCIENCES
ISSN	1009-637X
EISSN	1861-9568
出版年	2023
卷号	33 期号:1 页码:169-194
英文摘要	Water use efficiency (WUE) is an important variable to explore coupled relationships in carbon and water cycles. In this study, we first compared the spatial variations of annual gross primary productivity (GPP) and evapotranspiration (ET) using four GPP and ET products. Second, we selected the products closest to the flux towers data to estimate WUE. Finally, we quantitatively analyzed the impact of climate change and soil water content on WUE. The results showed that: (1) Four GPP and ET products provided good performance, with GOSIF-GPP and FLDAS-ET exhibiting a higher correlation and the smallest errors with the flux tower data. (2) The spatial pattern of WUE is consistent with that of GPP and ET, gradually decreasing from the northeast to the southwest. Higher WUE values appeared in the northeast forest ecosystem, and lower WUE values occurred in the western Gobi Desert, with a value of 0.28 gC m(-2) mm(-1). The GPP and ET products showed an increasing trend, while WUE showed a decreasing trend (55.15%) from 2001 to 2020. (3) The spatial relationship between WUE and driving factors reveal the variations in WUE of Inner Mongolia are mainly affected by soil moisture between 0 and 10 cm (SM0-10cm), vapor pressure deficit (VPD), and precipitation, respectively. (4) In arid regions, VPD and precipitation exhibit a major influence on WUE. An increase in VPD and precipitation has a negative and positive effect on WUE, with threshold values of approximately 0.36 kPa and 426 mm, respectively. (5) In humid regions, SM0-10cm, VPD, SM10-40cm, and SM40-100cm exert a significant impact on WUE, especially SM0-10cm, and weakens with increasing soil depths, these differences may be related to physiological structure and living characteristics of vegetation types in different climate regimes. Our results emphasize the importance of VPD and soil moisture in regional variability in WUE.
英文关键词	gross primary productivity (GPP) evapotranspiration (ET) water use efficiency (WUE) climate change soil water content
类型	Article
语种	英语
开放获取类型	Bronze
收录类别	SCI-E
WOS记录号	WOS:000911974900009
WOS关键词	GROSS PRIMARY PRODUCTIVITY ; ECOSYSTEM WATER ; CLIMATE-CHANGE ; TERRESTRIAL ECOSYSTEMS ; EVAPOTRANSPIRATION ; VEGETATION ; CHINA ; VARIABILITY ; EVAPORATION ; MODIS
WOS类目	Geography, Physical
WOS研究方向	Physical Geography
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/397337
推荐引用方式 GB/T 7714	Mei, Li,Tong, Siqin,Yin, Shan,et al. Spatiotemporal variations of water use efficiency and its driving factors in Inner Mongolia from 2001 to 2020[J],2023,33(1):169-194.
APA	Mei, Li.,Tong, Siqin.,Yin, Shan.,Bao, Yuhai.,Huang, Xiaojun.,...&Ye, Zhigang.(2023).Spatiotemporal variations of water use efficiency and its driving factors in Inner Mongolia from 2001 to 2020.JOURNAL OF GEOGRAPHICAL SCIENCES,33(1),169-194.
MLA	Mei, Li,et al."Spatiotemporal variations of water use efficiency and its driving factors in Inner Mongolia from 2001 to 2020".JOURNAL OF GEOGRAPHICAL SCIENCES 33.1(2023):169-194.