气候变化领域集成服务门户(CCPortal): Assessing the spatiotemporal dynamics of water and carbon fluxes in subtropical forest of Xin'an River Basin using an improved Biome-BGC model

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DOI	10.1016/j.jhydrol.2024.131201
	Assessing the spatiotemporal dynamics of water and carbon fluxes in subtropical forest of Xin'an River Basin using an improved Biome-BGC model
	Feng, Zhiyu; Xing, Wanqiu; Wang, Weiguang; Yu, Zhongbo; Shao, Quanxi; Chen, Shangfeng
发表日期	2024
ISSN	0022-1694
EISSN	1879-2707
起始页码	635
卷号	635
英文摘要	Extreme climate occurred frequently in subtropical region, which seriously affects carbon and water fluxes such as evapotranspiration (ET) and gross primary productivity (GPP) of terrestrial ecosystems. The process -based biome biogeochemical cycles (Biome-BGC) model is widely used for simulating carbon and water fluxes of forest ecosystems. However, the lack of the interaction information of climate, vegetation and soil, such as the hysteresis effect, canopy stratification on photosynthesis, impedes better simulations of the ecohydrological processes. Here, we tended to improve the simulation accuracy of Biome-BGC model at a subtropical forest on the Xin'an River in Southeastern China by reconstructing the precipitation series, modifying the ET and canopy multilayers modules, and optimizing the parameters. The spatiotemporal patterns of GPP, ET, water use efficiency (WUE) and their response to environmental factors across the Xin'an River Basin from 1982 to 2018 were further explored. The results showed that the improved model performed well, with the determination coefficient, root means square error and mean absolute error being 0.730, 1.522 gC/m2/d and 1.218 gC/m2/d for GPP, 0.857, 1.082 mm/d and 0.838 mm/d for ET, respectively. Basin -averaged GPP, ET and WUE increased during 1982-2018 and these increasing trends were more pronounced during 1999-2018. Significant positive trends of WUE occurred in the northeast corner. The increasing air temperature and precipitation respectively dominated the increase in GPP and ET, the increasing CO2 concentration and NDVI mitigated the negative effect of extreme precipitation on WUE. Given that human activities such as afforestation have effectively reduced the extent of damage to forest ecosystems from extreme precipitation, we highlight an urgent need to formulate adaptation strategies aimed at reducing the risk of extreme climate in humid regions.
英文关键词	Water and carbon fluxes; Water use efficiency; Biome-BGC model; Climate change; NDVI
语种	英语
WOS研究方向	Engineering ; Geology ; Water Resources
WOS类目	Engineering, Civil ; Geosciences, Multidisciplinary ; Water Resources
WOS记录号	WOS:001235741600001
来源期刊	JOURNAL OF HYDROLOGY
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/290733
作者单位	Hohai University; Hohai University; Hohai University; Hohai University; Hohai University; Commonwealth Scientific & Industrial Research Organisation (CSIRO); Chinese Academy of Sciences; Institute of Atmospheric Physics, CAS
推荐引用方式 GB/T 7714	Feng, Zhiyu,Xing, Wanqiu,Wang, Weiguang,et al. Assessing the spatiotemporal dynamics of water and carbon fluxes in subtropical forest of Xin'an River Basin using an improved Biome-BGC model[J],2024,635.
APA	Feng, Zhiyu,Xing, Wanqiu,Wang, Weiguang,Yu, Zhongbo,Shao, Quanxi,&Chen, Shangfeng.(2024).Assessing the spatiotemporal dynamics of water and carbon fluxes in subtropical forest of Xin'an River Basin using an improved Biome-BGC model.JOURNAL OF HYDROLOGY,635.
MLA	Feng, Zhiyu,et al."Assessing the spatiotemporal dynamics of water and carbon fluxes in subtropical forest of Xin'an River Basin using an improved Biome-BGC model".JOURNAL OF HYDROLOGY 635(2024).