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

Journal Article · · Scientific Reports
 [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)

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.

Research Organization:
Oregon State Univ., Corvallis, OR (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Biological and Environmental Research (BER)
Grant/Contract Number:
FG02-04ER63917; FG02-04ER63911
OSTI ID:
1374891
Journal Information:
Scientific Reports, Vol. 7, Issue 1; ISSN 2045-2322
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 56 works
Citation information provided by
Web of Science

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Large-scale biospheric drought response intensifies linearly with drought duration in arid regions journal May 2020
Mapping and linking supply- and demand-side measures in climate-smart agriculture. A review journal December 2017