DOI: 10.1175/JCLI-D-17-0580.1
Scopus记录号: 2-s2.0-85054074359
论文题名: Sensitivity of leaf area to interannual climate variation as a diagnostic of ecosystem function in CMIP5 carbon cycle models
作者: Quetin G.R. ; Swann A.L.S.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2018
卷: 31, 期: 20 起始页码: 8607
结束页码: 8625
语种: 英语
英文关键词: Atmosphere-land interaction
; Biosphere-atmosphere interaction
; Climate models
; Ecosystem effects
; Land surface model
; Model comparison
Scopus关键词: Biospherics
; Carbon
; Ecosystems
; Global warming
; Physiological models
; Sensitivity analysis
; Water supply
; Atmosphere-land interactions
; Biosphere-atmosphere interactions
; Ecosystem effects
; Land surface modeling
; Model comparison
; Climate models
英文摘要: The response of the biosphere to variation in climate plays a key role in predicting the carbon cycle, hydrological cycle, terrestrial surface energy balance, and the feedbacks in the climate system. Predicting the response of Earth's biosphere to global warming requires the ability to mechanistically represent the processes controlling photosynthesis, respiration, and water use. This study uses observations of the sensitivity of leaf area to the physical environment to identify where ecosystem functioning is well simulated in an ensemble of Earth system models. These patterns and data-model comparisons are leveraged to hypothesize which physiological mechanisms-photosynthetic efficiency, respiration, water supply, atmospheric water demand, and sunlight availability-dominate the ecosystem response in places with different climates. The models are generally successful in reproducing the broad sign and shape of the sensitivity of leaf area to interannual variations in climate, except for simulating generally decreased leaf area during warmer years in places with hot, wet climates. In addition, simulated sensitivity of the leaf area to temperature is generally larger and changes more rapidly across a gradient of temperature than is observed. We hypothesize that the amplified sensitivity and change are both due to a lack of adaptation and acclimation in simulations. This discrepancy with observations suggests that the simulated sensitivities of vegetation climate are too strong in the models. Finally, models and observations share an abrupt threshold between dry regions and wet regions around 1000 mm yr-1. © 2018 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/110683
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: Department of Atmospheric Sciences, University of Washington, Seattle, WA, United States
Recommended Citation:
Quetin G.R.,Swann A.L.S.. Sensitivity of leaf area to interannual climate variation as a diagnostic of ecosystem function in CMIP5 carbon cycle models[J]. Journal of Climate,2018-01-01,31(20)