干旱区生态环境知识资源中心(Arid): Attributions of Evapotranspiration and Gross Primary Production Changes in Semi-Arid Region: A Case Study in the Water Source Area of the Xiong'an New Area in North China

Arid

DOI	10.3390/rs14051187
	Attributions of Evapotranspiration and Gross Primary Production Changes in Semi-Arid Region: A Case Study in the Water Source Area of the Xiong'an New Area in North China
	Zeng, Sidong; Du, Hong; Xia, Jun; Wu, Jian; Yang, Linhan
通讯作者	Du, H
来源期刊	REMOTE SENSING
EISSN	2072-4292
出版年	2022
卷号	14 期号:5
英文摘要	Investigating the attributions of evapotranspiration (ET) and gross primary production (GPP) changes is of great importance for regional, sustainable water resources and ecological management in semi-arid regions. Based on the simulation conducted during 2000-2019 by improving water-carbon coupling Distributed Time Variant Gain Model, the trends of ET and GPP were estimated and the driving factors were identified via 10 experimental scenarios in the water source area of the Xiong'an New Area in North China. The results show significant increases both in ET and GPP by 2.4 mm/a and 6.0 gC/m(2)/a in the region, respectively. At the annual scale, increasing precipitation dominates the ET uptrend. Air temperature, humidity and the interactive effects also contribute to the ET uptrend, and the contributions are 12.8%, 2.0% and 2.3%, respectively, while elevated atmospheric CO2 concentration (eCO(2)) and solar dimming lead to ET changes of about -7.2% and -12.4%, respectively. For the GPP changes, the increase in GPP is mainly caused by eCO(2), increasing precipitation and rising temperature with the contributions of 56.7%, 34.8% and 27.8%, respectively. Solar dimming, humidity and windspeed contribute -6.8%, -4.8% and -3.5% of the GPP changes. Compared to climate change, land use and cover change has smaller effects on both ET and GPP for the few changes in land coverage. At the seasonal scale, ET and GPP increase to a greater extent during the growing season in spring and summer than in autumn and winter. Precipitation, temperature and eCO(2) are generally the main causes for ET and GPP changes. Meanwhile, the decreasing humidity and rising temperature are dominant factors for ET and GPP increases, respectively, in winter. Furthermore, solar dimming has strong effects on ET reduction in autumn. The contribution of the interactive effects is much higher on a seasonal scale than annual scale, contributing to considerable decreases in ET and GPP in spring, increases in ET in autumn and winter, and an increase in GPP in winter. This study highlights the importance of considering water-carbon coupling on the attributions of ET and GPP changes and the differentiation of the effects by the abovementioned influential factors at annual and seasonal scales.
英文关键词	attributions DTVGM model semi-arid region ecohydrological processes
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000768470300001
WOS关键词	CLIMATE-CHANGE ; GPP ; PHOTOSYNTHESIS ; MODEL ; CO2 ; ECOSYSTEMS ; IMPACTS ; RANGE
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
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/394120
推荐引用方式 GB/T 7714	Zeng, Sidong,Du, Hong,Xia, Jun,et al. Attributions of Evapotranspiration and Gross Primary Production Changes in Semi-Arid Region: A Case Study in the Water Source Area of the Xiong'an New Area in North China[J],2022,14(5).
APA	Zeng, Sidong,Du, Hong,Xia, Jun,Wu, Jian,&Yang, Linhan.(2022).Attributions of Evapotranspiration and Gross Primary Production Changes in Semi-Arid Region: A Case Study in the Water Source Area of the Xiong'an New Area in North China.REMOTE SENSING,14(5).
MLA	Zeng, Sidong,et al."Attributions of Evapotranspiration and Gross Primary Production Changes in Semi-Arid Region: A Case Study in the Water Source Area of the Xiong'an New Area in North China".REMOTE SENSING 14.5(2022).