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Title: Effect of climate warming on the annual terrestrial net ecosystem CO2 exchange globally in the boreal and temperate regions

Abstract

The net ecosystem CO2 exchange is the result of the imbalance between the assimilation process (gross primary production, GPP) and ecosystem respiration (RE). The aim of this study was to investigate temperature sensitivities of these processes and the effect of climate warming on the annual terrestrial net ecosystem CO2 exchange globally in the boreal and temperate regions. A database of 403 site-years of ecosystem flux data at 101 sites in the world was collected and analyzed. Temperature sensitivities of rates of RE and GPP were quantified with Q10, defined as the increase of RE (or GPP) rates with a temperature rise of 10 °C. Results showed that on the annual time scale, the intrinsic temperature sensitivity of GPP (Q10sG) was higher than or equivalent to the intrinsic temperature sensitivity of RE (Q10sR). Q10sG was negatively correlated to the mean annual temperature (MAT), whereas Q10sR was independent of MAT. The analysis of the current temperature sensitivities and net ecosystem production suggested that temperature rise might enhance the CO2 sink of terrestrial ecosystems both in the boreal and temperate regions. Additionally, ecosystems in these regions with different plant functional types should sequester more CO2 with climate warming.

Authors:
 [1];  [1];  [2]; ORCiD logo [3];  [4];  [1];  [1]; ORCiD logo [5];  [6];  [7];  [8];  [4]
  1. Sun Yat-sen Univ., Guangzhou (China)
  2. European Commission, Ispra (Italy)
  3. Univ. of Innsbruck, Innsbruck (Austria)
  4. ETH Zurich, Zurich (Switzerland)
  5. Georg-August Univ. of Gottingen, Gottingen (Germany)
  6. Univ. of Eastern Finland, Kuopio (Finland)
  7. Hokkaido Univ., Sapporo (Japan)
  8. Hokkaido Univ., Horonobe (Japan)
Publication Date:
Research Org.:
Oregon State Univ., Corvallis, OR (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Biological and Environmental Research (BER) (SC-23)
OSTI Identifier:
1374891
Grant/Contract Number:  
FG02-04ER63917; FG02-04ER63911
Resource Type:
Accepted Manuscript
Journal Name:
Scientific Reports
Additional Journal Information:
Journal Volume: 7; Journal Issue: 1; Journal ID: ISSN 2045-2322
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; climate-change ecology

Citation Formats

Zhang, Zhiyuan, Zhang, Renduo, Cescatti, Alessandro, Wohlfahrt, Georg, Buchmann, Nina, Zhu, Juan, Chen, Guanhong, Moyano, Fernando, Pumpanen, Jukka, Hirano, Takashi, Takagi, Kentaro, and Merbold, Lutz. Effect of climate warming on the annual terrestrial net ecosystem CO2 exchange globally in the boreal and temperate regions. United States: N. p., 2017. Web. doi:10.1038/s41598-017-03386-5.
Zhang, Zhiyuan, Zhang, Renduo, Cescatti, Alessandro, Wohlfahrt, Georg, Buchmann, Nina, Zhu, Juan, Chen, Guanhong, Moyano, Fernando, Pumpanen, Jukka, Hirano, Takashi, Takagi, Kentaro, & Merbold, Lutz. Effect of climate warming on the annual terrestrial net ecosystem CO2 exchange globally in the boreal and temperate regions. United States. doi:10.1038/s41598-017-03386-5.
Zhang, Zhiyuan, Zhang, Renduo, Cescatti, Alessandro, Wohlfahrt, Georg, Buchmann, Nina, Zhu, Juan, Chen, Guanhong, Moyano, Fernando, Pumpanen, Jukka, Hirano, Takashi, Takagi, Kentaro, and Merbold, Lutz. Thu . "Effect of climate warming on the annual terrestrial net ecosystem CO2 exchange globally in the boreal and temperate regions". United States. doi:10.1038/s41598-017-03386-5. https://www.osti.gov/servlets/purl/1374891.
@article{osti_1374891,
title = {Effect of climate warming on the annual terrestrial net ecosystem CO2 exchange globally in the boreal and temperate regions},
author = {Zhang, Zhiyuan and Zhang, Renduo and Cescatti, Alessandro and Wohlfahrt, Georg and Buchmann, Nina and Zhu, Juan and Chen, Guanhong and Moyano, Fernando and Pumpanen, Jukka and Hirano, Takashi and Takagi, Kentaro and Merbold, Lutz},
abstractNote = {The net ecosystem CO2 exchange is the result of the imbalance between the assimilation process (gross primary production, GPP) and ecosystem respiration (RE). The aim of this study was to investigate temperature sensitivities of these processes and the effect of climate warming on the annual terrestrial net ecosystem CO2 exchange globally in the boreal and temperate regions. A database of 403 site-years of ecosystem flux data at 101 sites in the world was collected and analyzed. Temperature sensitivities of rates of RE and GPP were quantified with Q10, defined as the increase of RE (or GPP) rates with a temperature rise of 10 °C. Results showed that on the annual time scale, the intrinsic temperature sensitivity of GPP (Q10sG) was higher than or equivalent to the intrinsic temperature sensitivity of RE (Q10sR). Q10sG was negatively correlated to the mean annual temperature (MAT), whereas Q10sR was independent of MAT. The analysis of the current temperature sensitivities and net ecosystem production suggested that temperature rise might enhance the CO2 sink of terrestrial ecosystems both in the boreal and temperate regions. Additionally, ecosystems in these regions with different plant functional types should sequester more CO2 with climate warming.},
doi = {10.1038/s41598-017-03386-5},
journal = {Scientific Reports},
number = 1,
volume = 7,
place = {United States},
year = {2017},
month = {6}
}

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