干旱区生态环境知识资源中心(Arid): Water use efficiency in terrestrial ecosystem over East Asia: Effects of climate regimes and land cover types

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DOI	10.1016/j.scitotenv.2021.145519
	Water use efficiency in terrestrial ecosystem over East Asia: Effects of climate regimes and land cover types
	Kim, Daeun; Baik, Jongjin; Umair, Muhammad; Choi, Minha
通讯作者	Choi, M (corresponding author), Sungkyunkwan Univ, Grad Sch Water Resources, Dept Water Resources, 2066 Seobu Ro, Suwon 16419, Gyeonggi Do, South Korea.
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
ISSN	0048-9697
EISSN	1879-1026
出版年	2021
卷号	773
英文摘要	Water use efficiency (WUE) is an environmental factor to account for the metabolism of terrestrial ecosystems using various climate systems and vegetation types. It is estimated by the ratio of gross primary productivity (GPP) to evapotranspiration (ET), the largest carbon and water fluxes with respect to plant respiration. In this study, the WUE was calculated using GPP and ET from the community land model version 4.0 (CLM4.0), inclusive of the prognostic carbon-nitrogen model in the community earth system model (CESM). The estimated WUE in East Asia was analyzed for climate zones, land cover types, and water- and energy-limited zones, with aridity index (AI). Spatial variations from 2001 to 2015 in annual WUE gradually increased as latitude decreased, though small year-to-year differences appeared between monthly GPP and ET. Monthly WUE was lower in summer than fall because the water loss rate in summer was higher than the carbon assimilation increase. The WUE under arid conditions (AI<0.5) was lower than under humid conditions. The GPP, ET, and WUE were higher in the forest, savannas, cropland, and permanent wetland with dense vegetation or abundant water resources than in other land cover types. The WUE was lower in water-limited zones than in energy-limited zones due to the low amount of water to use for the physical processes of GPP and ET. Based on this study, we identified general spatial and temporal variations of carbon fluxes in East Asia with various climate zones and land cover types. (C) 2021 Elsevier B.V. All rights reserved.
英文关键词	WUE GPP CLM4.0 Climate zones Land cover types
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000635207100067
WOS关键词	CARBON-DIOXIDE ; VAPOR EXCHANGE ; MODEL ; VEGETATION ; FOREST ; CHINA ; EVAPOTRANSPIRATION ; MODIS ; CO2 ; PRODUCTIVITY
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/368694
作者单位	[Kim, Daeun] Presidential Water Commiss, Han River Basin Support Grp, Hanam 12902, South Korea; [Baik, Jongjin] Sungkyunkwan Univ, Ctr Built Environm, Suwon 16419, South Korea; [Umair, Muhammad] Natl Univ Sci & Technol, Sch Civil & Environm Engn, Inst Geog Informat Syst, Islamabad, Pakistan; [Choi, Minha] Sungkyunkwan Univ, Grad Sch Water Resources, Dept Water Resources, 2066 Seobu Ro, Suwon 16419, Gyeonggi Do, South Korea
推荐引用方式 GB/T 7714	Kim, Daeun,Baik, Jongjin,Umair, Muhammad,et al. Water use efficiency in terrestrial ecosystem over East Asia: Effects of climate regimes and land cover types[J],2021,773.
APA	Kim, Daeun,Baik, Jongjin,Umair, Muhammad,&Choi, Minha.(2021).Water use efficiency in terrestrial ecosystem over East Asia: Effects of climate regimes and land cover types.SCIENCE OF THE TOTAL ENVIRONMENT,773.
MLA	Kim, Daeun,et al."Water use efficiency in terrestrial ecosystem over East Asia: Effects of climate regimes and land cover types".SCIENCE OF THE TOTAL ENVIRONMENT 773(2021).