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Title: Air temperature optima of vegetation productivity across global biomes

Abstract

The global distribution of the optimum air temperature for ecosystem-level gross primary productivity ( T$$^{eco}_{opt}$$) is poorly understood, despite its importance for ecosystem carbon uptake under future warming. We provide empirical evidence for the existence of such an optimum, using measurements of in situ eddy covariance and satellite-derived proxies, and report its global distribution. T$$^{eco}_{opt}$$ is consistently lower than the physiological optimum temperature of leaf-level photosynthetic capacity, which typically exceeds 30 °C. The global average T$$^{eco}_{opt}$$ is estimated to be 23 ± 6 °C, with warmer regions having higher T$$^{eco}_{opt}$$ values than colder regions. In tropical forests in particular, T$$^{eco}_{opt}$$ is close to growing-season air temperature and is projected to fall below it under all scenarios of future climate, suggesting a limited safe operating space for these ecosystems under future warming.

Authors:
 [1];  [1];  [2];  [3]; ORCiD logo [4]; ORCiD logo [4];  [5];  [6]
  1. Peking University, China
  2. Laboratoire des Sciences du Climat et de l'Environnement (LSCE), France
  3. Lawrence Berkeley National Laboratory (LBNL)
  4. ORNL
  5. Brookhaven National Laboratory (BNL)
  6. University of Antwerp, Belgium
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Biological and Environmental Research (BER) (SC-23)
OSTI Identifier:
1550764
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
Nature Ecology and Evolution
Additional Journal Information:
Journal Volume: 3; Journal Issue: 5; Journal ID: ISSN 2397-334X
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English

Citation Formats

Huang, Mengtian, Piao, Shilong, Ciais, Philippe, Keenan, Trevor, Mao, Jiafu, Shi, Xiaoying, Wu, Jin, and Janssens, Ivan A. Air temperature optima of vegetation productivity across global biomes. United States: N. p., 2019. Web. doi:10.1038/s41559-019-0838-x.
Huang, Mengtian, Piao, Shilong, Ciais, Philippe, Keenan, Trevor, Mao, Jiafu, Shi, Xiaoying, Wu, Jin, & Janssens, Ivan A. Air temperature optima of vegetation productivity across global biomes. United States. doi:10.1038/s41559-019-0838-x.
Huang, Mengtian, Piao, Shilong, Ciais, Philippe, Keenan, Trevor, Mao, Jiafu, Shi, Xiaoying, Wu, Jin, and Janssens, Ivan A. Fri . "Air temperature optima of vegetation productivity across global biomes". United States. doi:10.1038/s41559-019-0838-x.
@article{osti_1550764,
title = {Air temperature optima of vegetation productivity across global biomes},
author = {Huang, Mengtian and Piao, Shilong and Ciais, Philippe and Keenan, Trevor and Mao, Jiafu and Shi, Xiaoying and Wu, Jin and Janssens, Ivan A.},
abstractNote = {The global distribution of the optimum air temperature for ecosystem-level gross primary productivity (T$^{eco}_{opt}$) is poorly understood, despite its importance for ecosystem carbon uptake under future warming. We provide empirical evidence for the existence of such an optimum, using measurements of in situ eddy covariance and satellite-derived proxies, and report its global distribution. T$^{eco}_{opt}$ is consistently lower than the physiological optimum temperature of leaf-level photosynthetic capacity, which typically exceeds 30 °C. The global average T$^{eco}_{opt}$ is estimated to be 23 ± 6 °C, with warmer regions having higher T$^{eco}_{opt}$ values than colder regions. In tropical forests in particular, T$^{eco}_{opt}$ is close to growing-season air temperature and is projected to fall below it under all scenarios of future climate, suggesting a limited safe operating space for these ecosystems under future warming.},
doi = {10.1038/s41559-019-0838-x},
journal = {Nature Ecology and Evolution},
number = 5,
volume = 3,
place = {United States},
year = {2019},
month = {3}
}

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This content will become publicly available on March 1, 2020
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