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Title: The terrestrial carbon budget of South and Southeast Asia

Journal Article · · Environmental Research Letters
 [1];  [1];  [1];  [2];  [3];  [4];  [5]; ORCiD logo [6];  [7];  [8];  [9];  [4];  [10];  [11];  [12];  [13]
  1. Univ. of Illinois, Urbana, IL (United States)
  2. Karlsruhe Inst. of Technology (KIT) (Germany)
  3. Commonwealth Scientific and Industrial Research Organization (CSIRO), Canberroa, ACT (Australia)
  4. Univ. of Exeter (United Kingdom)
  5. Woods Hole Research Center, Falmouth, MA (United States)
  6. Inst. of Applied Energy, Tokyo (Japan)
  7. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  8. JAMSTEC, Yokohama (Japan)
  9. Montana State Univ., Bozeman, MT (United States)
  10. Imperial College, Ascot (United Kingdom)
  11. Alternative Energies and Atomic Energy Commission (CEA), Saclay (France)
  12. Met Office Hadley Centre, Exeter (United Kingdom)
  13. Univ. of Maryland, College Park, MD (United States)

Accomplishing the objective of the current climate policies will require establishing carbon budget and flux estimates in each region and county of the globe by comparing and reconciling multiple estimates including the observations and the results of top-down atmospheric carbon dioxide (CO2) inversions and bottom-up dynamic global vegetation models. With this in view, this study synthesizes the carbon source/sink due to net ecosystem productivity (NEP), land cover land use change (ELUC), fires and fossil burning (EFIRE) for the South Asia (SA), Southeast Asia (SEA) and South and Southeast Asia (SSEA = SA + SEA) and each country in these regions using the multiple top-down and bottom-up modeling results. The terrestrial net biome productivity (NBP=NEP - ELUC - EFIRE) calculated based on bottom-up models in combination with EFIRE based on GFED4s data show net carbon sinks of 217 ± 147, 10 ± 55, and 227 ± 279 TgC yr-1 for SA, SEA, and SSEA. The top-down models estimated NBP net carbon sinks were 20 ± 170, 4 ± 90 and 24 ± 180 TgC yr-1. In comparison, regional emissions from the combustion of fossil fuels were 495, 275, and 770 TgC yr-1, which are many times higher than the NBP sink estimates, suggesting that the contribution of the fossil fuel emissions to the carbon budget of SSEA results in a significant net carbon source during the 2000s. When considering both NBP and fossil fuel emissions for the individual countries within the regions, Bhutan and Laos were net carbon sinks and rest of the countries were net carbon source during the 2000s. The relative contributions of each of the fluxes (NBP, NEP, ELUC, and EFIRE, fossil fuel emissions) to a nation’s net carbon flux varied greatly from country to country, suggesting a heterogeneous dominant carbon fluxes on the country-level throughout SSEA.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Biological and Environmental Research (BER)
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1471025
Journal Information:
Environmental Research Letters, Vol. 11, Issue 10; ISSN 1748-9326
Publisher:
IOP PublishingCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 28 works
Citation information provided by
Web of Science

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Cited By (8)

Global projections of future cropland expansion to 2050 and direct impacts on biodiversity and carbon storage journal October 2018
Riverine carbon fluxes to the South China Sea: RIVERINE CARBON FLUXES TO THE SCS journal May 2017
Seasonal evaluation of tropospheric CO2 over the Asia-Pacific region observed by the CONTRAIL commercial airliner measurements journal January 2018
Long-term carbon sink in Borneo’s forests halted by drought and vulnerable to edge effects journal December 2017
Land Cover Change Intensifies Actual and Potential Radiative Forcing through CO2 in South and Southeast Asia from 1992 to 2015 journal July 2019
State of the science in reconciling top‐down and bottom‐up approaches for terrestrial CO 2 budget journal December 2019
Seasonal evaluation of tropospheric CO2 over the Asia-Pacific region observed by the CONTRAIL commercial airliner measurements journal June 2018
Author Correction: Long-term carbon sink in Borneo’s forests halted by drought and vulnerable to edge effects journal January 2018

Figures / Tables (6)


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