DOI: 10.1175/JCLI-D-16-0829.1
Scopus记录号: 2-s2.0-85022330802
论文题名: Empirically derived sensitivity of vegetation to climate across global gradients of temperature and precipitation
作者: Quetin G.R. ; Swann A.L.S.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2017
卷: 30, 期: 15 起始页码: 5835
结束页码: 5849
语种: 英语
Scopus关键词: Ecology
; Ecosystems
; Photosynthesis
; Physiological models
; Sensitivity analysis
; Vegetation
; Water supply
; Atmosphere-land interactions
; Biosphere-atmosphere interactions
; Climate classification/regimes
; Environmental conditions
; Functional constraints
; Land surface
; Physiological response
; Terrestrial ecosystems
; Climate models
英文摘要: The natural composition of terrestrial ecosystems can be shaped by climate to take advantage of local environmental conditions. Ecosystem functioning (e.g., interaction between photosynthesis and temperature) can also acclimate to different climatological states. The combination of these two factors thus determines ecological- climate interactions.Aglobal empiricalmap of the sensitivity of vegetation to climate is derived using the response of satellite-observed greenness to interannual variations in temperature and precipitation. Mechanisms constraining ecosystem functioning are inferred by analyzing how the sensitivity of vegetation to climate varies across climate space.Analysis yields empirical evidence formultiple physical and biological mediators of the sensitivity of vegetation to climate at large spatial scales. In hot and wet locations, vegetation is greener in warmer years despite temperatures likely exceeding thermally optimum conditions. However, sunlight generally increases during warmer years, suggesting that the increased stress from higher atmospheric water demand is offset by higher rates of photosynthesis. The sensitivity of vegetation transitions in sign (greener when warmer or drier to greener when cooler or wetter) along an emergent line in climate space with a slope of about 59mmyr-1 °C-1, twice as steep as contours of aridity. The mismatch between these slopes is evidence at a global scale of the limitation of both water supply due to inefficiencies in plant access to rainfall and plant physiological responses to atmospheric water demand. This empirical pattern can provide a functional constraint for process-based models, helping to improve predictions of the global-scale response of vegetation to a changing climate. © 2017 American Meteorological Society. 资助项目: NSF, National Science Foundation
; NSF, National Science Foundation
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/48813
Appears in Collections: 气候减缓与适应 气候变化与战略
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作者单位: Department of Atmospheric Sciences, University of Washington, Seattle, WA, United States; Department of Biology, University of Washington, Seattle, WA, United States
Recommended Citation:
Quetin G.R.,Swann A.L.S.. Empirically derived sensitivity of vegetation to climate across global gradients of temperature and precipitation[J]. Journal of Climate,2017-01-01,30(15)