DOI: 10.1002/2016MS000732
Scopus记录号: 2-s2.0-85013771754
论文题名: Biophysical consequences of photosynthetic temperature acclimation for climate
作者: Smith N ; G ; , Lombardozzi D ; , Tawfik A ; , Bonan G ; , Dukes J ; S
刊名: Journal of Advances in Modeling Earth Systems
ISSN: 19422466
出版年: 2017
卷: 9, 期: 1 起始页码: 536
结束页码: 547
语种: 英语
英文关键词: Carbon dioxide
; Climate change
; Climate models
; Earth (planet)
; Earth atmosphere
; Forestry
; Latent heat
; Oceanography
; Photosynthesis
; Precipitation (chemical)
; Surface waters
; Biophysical mechanism
; Coupled modeling
; Photosynthetic response
; Sea surface temperature (SST)
; Sensible heat
; Stomatal conductance
; Surface air temperatures
; Temperature acclimation
; Atmospheric temperature
; acclimation
; air temperature
; atmosphere-biosphere interaction
; biophysics
; carbon sequestration
; climate change
; coupling
; future prospect
; global climate
; latent heat flux
; photosynthesis
; precipitation (climatology)
; sea surface temperature
; sensible heat flux
; stomatal conductance
; temperature
; warming
英文摘要: Photosynthetic temperature acclimation is a commonly observed process that is increasingly being incorporated into Earth System Models (ESMs). While short-term acclimation has been shown to increase carbon storage in the future, it is uncertain whether acclimation will directly influence simulated future climate through biophysical mechanisms. Here, we used coupled atmosphere-biosphere simulations using the Community Earth System Model (CESM) to assess how acclimation-induced changes in photosynthesis influence global climate under present-day and future (RCP 8.5) conditions. We ran four 30 year simulations that differed only in sea surface temperatures and atmospheric CO2 (present or future) and whether a mechanism for photosynthetic temperature acclimation was included (yes or no). Acclimation increased future photosynthesis and, consequently, the proportion of energy returned to the atmosphere as latent heat, resulting in reduced surface air temperatures in areas and seasons where acclimation caused the biggest increase in photosynthesis. However, this was partially offset by temperature increases elsewhere, resulting in a small, but significant, global cooling of 0.05°C in the future, similar to that expected from acclimation-induced increases in future land carbon storage found in previous studies. In the present-day simulations, the photosynthetic response was not as strong and cooling in highly vegetated regions was less than warming elsewhere, leading to a net global increase in temperatures of 0.04°C. Precipitation responses were variable and rates did not change globally in either time period. These results, combined with carbon-cycle effects, suggest that models without acclimation may be overestimating positive feedbacks between climate and the land surface in the future. © 2017. The Authors. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/75828
Appears in Collections: 影响、适应和脆弱性 气候变化与战略
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作者单位: Department of Forestry and Natural Resources, Purdue University, West Lafayette, IN, United States; Purdue Climate Change Research Center, Purdue University, West Lafayette, IN, United States; Department of Biological Sciences, Purdue University, West Lafayette, IN, United States; Climate and Ecosystems Division, Lawrence Berkeley National Lab, Berkeley, CA, United States; Terrestrial Sciences Section, National Center for Atmospheric Research, Boulder, CO, United States
Recommended Citation:
Smith N,G,, Lombardozzi D,et al. Biophysical consequences of photosynthetic temperature acclimation for climate[J]. Journal of Advances in Modeling Earth Systems,2017-01-01,9(1)