干旱区生态环境知识资源中心(Arid): Soil moisture variation drives canopy water content dynamics across the western US

Arid

DOI	10.1016/j.rse.2020.112233
	Soil moisture variation drives canopy water content dynamics across the western US
	Lyons, Drew S.; Dobrowski, Solomon Z.; Holden, Zachary A.; Maneta, Marco P.; Sala, Anna
通讯作者	Lyons, DS (corresponding author), Univ Montana, WA Franke Coll Forestry & Conservat, Dept Forest Management, 32 Campus Dr, Missoula, MT 59812 USA.
来源期刊	REMOTE SENSING OF ENVIRONMENT
ISSN	0034-4257
EISSN	1879-0704
出版年	2021
卷号	253
英文摘要	Drought stress is a major contributing factor to plant mortality across the globe. Drought effects are often studied at the local scale, but recent advances in remote sensing allow for observations of plant water status across broad geographic scales. The vegetation optical depth (VOD) derived from satellite-based surface microwave emission has been shown to be sensitive to canopy water content, which is increasingly recognized as an important indicator of water relations and incipient mortality in plants. We develop an index which quantifies the normalized difference between night- and daytime diurnal VOD retrievals (nVOD(r)) and apply it across the western U.S. to determine the relative sensitivity of plants to variations in water supply (soil moisture) and atmospheric water demand (vapor pressure deficit -VPD). Canopy water content dynamics were most sensitive to soil moisture variation at intermediate climatic water deficits where tree cover transitions to grass cover. These areas are in transitional climate zones and occur at ecotones between forest and non-forest vegetation where canopy water content dynamics are most sensitive to both soil moisture and VPD variation. Our results suggest that vegetation in semi-arid ecotones is likely to see the most proximal impacts of drought stress as the planet warms.
英文关键词	Vapor pressure deficit Soil moisture Canopy water content Vegetation optical depth Drought stress Land surface-atmosphere coupling
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000604325700003
WOS关键词	FOREST DIE-OFF ; TREE MORTALITY ; CLIMATE-CHANGE ; ATMOSPHERIC DEMAND ; UNITED-STATES ; DROUGHT ; RESPONSES ; PATTERNS ; VULNERABILITY ; PRODUCTIVITY
WOS类目	Environmental Sciences ; Remote Sensing ; Imaging Science & Photographic Technology
WOS研究方向	Environmental Sciences & Ecology ; 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/2XILL650/348147
作者单位	[Lyons, Drew S.; Dobrowski, Solomon Z.] Univ Montana, WA Franke Coll Forestry & Conservat, Dept Forest Management, 32 Campus Dr, Missoula, MT 59812 USA; [Holden, Zachary A.] US Forest Serv, Northern Reg 1,26 Ft Missoula Rd, Missoula, MT 59804 USA; [Holden, Zachary A.] Univ Montana, WA Franke Coll Forestry & Conservat, Dept Geog, 32 Campus Dr, Missoula, MT 59812 USA; [Maneta, Marco P.] Univ Montana, Coll Humanities & Sci, Dept Geosci, 32 Campus Dr, Missoula, MT 59812 USA; [Sala, Anna] Univ Montana, Coll Humanities & Sci, Div Biol Sci, 32 Campus Dr, Missoula, MT 59812 USA
推荐引用方式 GB/T 7714	Lyons, Drew S.,Dobrowski, Solomon Z.,Holden, Zachary A.,et al. Soil moisture variation drives canopy water content dynamics across the western US[J],2021,253.
APA	Lyons, Drew S.,Dobrowski, Solomon Z.,Holden, Zachary A.,Maneta, Marco P.,&Sala, Anna.(2021).Soil moisture variation drives canopy water content dynamics across the western US.REMOTE SENSING OF ENVIRONMENT,253.
MLA	Lyons, Drew S.,et al."Soil moisture variation drives canopy water content dynamics across the western US".REMOTE SENSING OF ENVIRONMENT 253(2021).