气候变化领域集成服务门户(CCPortal): Satellite-derived foresummer drought sensitivity of plant productivity in Rocky Mountain headwater catchments: spatial heterogeneity and geological-geomorphological control

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DOI	10.1088/1748-9326/ab8fd0
	Satellite-derived foresummer drought sensitivity of plant productivity in Rocky Mountain headwater catchments: spatial heterogeneity and geological-geomorphological control
	Wainwright H.M.; Steefel C.; Trutner S.D.; Henderson A.N.; Nikolopoulos E.I.; Wilmer C.F.; Chadwick K.D.; Falco N.; Schaettle K.B.; Brown J.B.; Steltzer H.; Williams K.H.; Hubbard S.S.; Enquist B.J.
发表日期	2020
ISSN	17489318
卷号	15 期号:8
英文摘要	Long-term plot-scale studies have found water limitation to be a key factor driving ecosystem productivity in the Rocky Mountains. Specifically, the intensity of early summer (the 'foresummer' period from May to June) drought conditions appears to impose critical controls on peak ecosystem productivity. This study aims to (1) assess the importance of early snowmelt and foresummer drought in controlling peak plant productivity, based on the historical Landsat normalized-difference vegetation index (NDVI) and climate data; (2) map the spatial heterogeneity of foresummer drought sensitivity; and (3) identify the environmental controls (e.g. geomorphology, elevation, geology, plant types) on drought sensitivity. Our domain (15 15 km) includes four drainages within the East Water watershed near Gothic, Colorado, USA. We define foresummer drought sensitivity based on the regression slopes of the annual peak NDVI against the June Palmer Drought Severity Index between 1992 and 2010. Results show that foresummer drought sensitivity is spatially heterogeneous, and primarily dependent on the plant type and elevation. In support of the plot-based studies, we find that years with earlier snowmelt and drier foresummer conditions lead to lower peak NDVI; particularly in the low-elevation regions. Using random forest analysis, we identify additional key controls related to surface energy exchanges (i.e. potential net radiation), hydrological processes (i.e. microtopography and slope), and underlying geology. This remote-sensing-based approach for quantifying foresummer drought sensitivity can be used to identify the regions that are vulnerable or resilient to climate perturbations, as well as to inform future sampling, characterization, and modeling studies. © 2020 The Author(s). Published by IOP Publishing Ltd.
英文关键词	foresummer drought sensitivity; NDVI; random forest; Rocky Mountains
语种	英语
scopus关键词	Catchments; Decision trees; Ecosystems; Geology; Productivity; Remote sensing; Snow melting systems; Ecosystem productivity; Environmental control; Headwater catchment; Hydrological process; Normalized difference vegetation index; Palmer drought severity indices; Plant productivity; Spatial heterogeneity; Drought; catchment; drought; geology; geomorphology; headwater; heterogeneity; Landsat; NDVI; primary production; regression analysis; sampling; satellite data; sensitivity analysis; spatial analysis; summer; Colorado; Rocky Mountains; United States
来源期刊	Environmental Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/153893
作者单位	Climate and Ecosystem Sciences Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, MS 74R-316C, Berkeley, CA 94720-8126, United States; Lawrence Berkeley National Laboratory, 988 Belmont Terrace Unit 10, Sunnyvale, CA 94086, United States; Colorado School of Mines, 1500 Illinois St, Golden, CO 80401, United States; Rocky Mountain Biological Laboratory, PO Box 519, Crested Butte, CO 81224, United States; Department of Mechanical and Civil Engineering, Florida Institute of Technology, 150 W. University Blvd, Melbourne, FL 32901, United States; Department of Ecosystem Science and Sustainability, Colorado State University, Fort Collins, CO 80523-1476, United States; Department of Earth System Science, Stanford University, 473 Via Ortega, Stanford, CA 94305, United States; Chemical and Biomolecular Engineering, University of California, Berkeley, United States; Gilman Hall University of California, Berkeley, CA 94720-1462, United States; Environmental Genomics and Systems Biology, Lawren...
推荐引用方式 GB/T 7714	Wainwright H.M.,Steefel C.,Trutner S.D.,et al. Satellite-derived foresummer drought sensitivity of plant productivity in Rocky Mountain headwater catchments: spatial heterogeneity and geological-geomorphological control[J],2020,15(8).
APA	Wainwright H.M..,Steefel C..,Trutner S.D..,Henderson A.N..,Nikolopoulos E.I..,...&Enquist B.J..(2020).Satellite-derived foresummer drought sensitivity of plant productivity in Rocky Mountain headwater catchments: spatial heterogeneity and geological-geomorphological control.Environmental Research Letters,15(8).
MLA	Wainwright H.M.,et al."Satellite-derived foresummer drought sensitivity of plant productivity in Rocky Mountain headwater catchments: spatial heterogeneity and geological-geomorphological control".Environmental Research Letters 15.8(2020).