干旱区生态环境知识资源中心(Arid): Influence of the dry event induced hydraulic redistribution on water and carbon cycles at five AsiaFlux forest sites: A site study combining measurements and modeling

Arid

DOI	10.1016/j.jhydrol.2020.124979
	Influence of the dry event induced hydraulic redistribution on water and carbon cycles at five AsiaFlux forest sites: A site study combining measurements and modeling
	Wu, Haohao; Fu, Congsheng; Wu, Huawu; Zhang, Lingling
通讯作者	Fu, CS
来源期刊	JOURNAL OF HYDROLOGY
ISSN	0022-1694
EISSN	1879-2707
出版年	2020
卷号	587
英文摘要	Recent studies have incorporated hydraulic redistribution (HR) schemes into Earth system models to explore its effects on the hydrological, biogeochemical, and ecological processes of terrestrial ecosystems. However, the influence of HR on ecosystems during increasingly frequent extreme drought events, and the performance of different HR schemes at sites with contrasting ecosystem types and climate regimes, remains unclear, especially among ecologically fragile forest ecosystems in Asia. In this study, we incorporated two different HR schemes into Community Land Model version 4.5 (CLM4.5). The model generally improved predictions of soil moisture, evapotranspiration (ET), and carbon (C) fluxes at five AsiaFlux sites with contrasting climate regimes. Upward HR stimulated surface soil moisture, and increased ET by 0.29-0.68 mm H2O day(-1), and net ecosystem C uptake by 1.03 x 10(-6) to 1.64 x 10(-5) g C m(-2) s(-1), at the five forest sites during dry events. Remarkable downward HR was found only in a semi-arid ecosystem located at the northeastern margin of the Qinghai-Tibet Plateau. Incorporating of a simple empirical HR scheme into CLM4.5 yielded better performance than incorporating a physically based scheme into the model for ecosystems with seasonal frozen soil layers. Combined with previous studies at AmeriFlux sites, it can be concluded that climate zones with overlapped dry season and growing season showed clear hydraulic lift during dry season; climate zones with overlapped wet season and growing season showed clear hydraulic descent if precipitation was limited (e.g. <= 400 mm a(-1)), and did not showed clear influences of HR if the precipitation was unlimited (e.g. >= 800 mm a(-1)).
英文关键词	AsiaFlux Community Land Model Evapotranspiration Hydraulic redistribution Net ecosystem carbon exchange Soil moisture
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000568819100024
WOS关键词	LOWLAND DIPTEROCARP FOREST ; SOIL-WATER ; PARTITIONING EVAPOTRANSPIRATION ; ARTEMISIA-TRIDENTATA ; EAST KALIMANTAN ; PLANT-ROOTS ; LAND MODEL ; ECOSYSTEM ; MOISTURE ; TRANSPIRATION
WOS类目	Engineering, Civil ; Geosciences, Multidisciplinary ; Water Resources
WOS研究方向	Engineering ; Geology ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/326236
作者单位	[Wu, Haohao; Fu, Congsheng; Wu, Huawu] Chinese Acad Sci, Nanjing Inst Geog & Limnol, Key Lab Watershed Geog Sci, 73 East Beijing Rd, Nanjing 210008, Peoples R China; [Zhang, Lingling] Jiangsu Acad Agr Sci, Inst Agr Informat, 50 Zhongling St, Nanjing 210014, Peoples R China
推荐引用方式 GB/T 7714	Wu, Haohao,Fu, Congsheng,Wu, Huawu,et al. Influence of the dry event induced hydraulic redistribution on water and carbon cycles at five AsiaFlux forest sites: A site study combining measurements and modeling[J],2020,587.
APA	Wu, Haohao,Fu, Congsheng,Wu, Huawu,&Zhang, Lingling.(2020).Influence of the dry event induced hydraulic redistribution on water and carbon cycles at five AsiaFlux forest sites: A site study combining measurements and modeling.JOURNAL OF HYDROLOGY,587.
MLA	Wu, Haohao,et al."Influence of the dry event induced hydraulic redistribution on water and carbon cycles at five AsiaFlux forest sites: A site study combining measurements and modeling".JOURNAL OF HYDROLOGY 587(2020).