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Title: Assessing net ecosystem carbon exchange of U S terrestrial ecosystems by integrating eddy covariance flux measurements and satellite observations

Abstract

More accurate projections of future carbon dioxide concentrations in the atmosphere and associated climate change depend on improved scientific understanding of the terrestrial carbon cycle. Despite the consensus that U.S. terrestrial ecosystems provide a carbon sink, the size, distribution, and interannual variability of this sink remain uncertain. Here we report a terrestrial carbon sink in the conterminous U.S. at 0.63 pg C yr 1 with the majority of the sink in regions dominated by evergreen and deciduous forests and savannas. This estimate is based on our continuous estimates of net ecosystem carbon exchange (NEE) with high spatial (1 km) and temporal (8-day) resolutions derived from NEE measurements from eddy covariance flux towers and wall-to-wall satellite observations from Moderate Resolution Imaging Spectroradiometer (MODIS). We find that the U.S. terrestrial ecosystems could offset a maximum of 40% of the fossil-fuel carbon emissions. Our results show that the U.S. terrestrial carbon sink varied between 0.51 and 0.70 pg C yr 1 over the period 2001 2006. The dominant sources of interannual variation of the carbon sink included extreme climate events and disturbances. Droughts in 2002 and 2006 reduced the U.S. carbon sink by 20% relative to a normal year. Disturbances including wildfires andmore » hurricanes reduced carbon uptake or resulted in carbon release at regional scales. Our results provide an alternative, independent, and novel constraint to the U.S. terrestrial carbon sink.« less

Authors:
 [1];  [2];  [3];  [3];  [4];  [5];  [6];  [7];  [8];  [9];  [9];  [9];  [10];  [10];  [11];  [12];  [13];  [14];  [15];  [8] more »;  [8];  [5];  [16];  [17];  [17];  [18];  [19];  [5];  [20];  [5];  [21];  [22];  [15];  [23];  [24];  [25];  [26];  [12] « less
  1. Purdue University
  2. Oregon State University
  3. University of California, Berkeley
  4. University of Toledo, Toledo, OH
  5. Harvard University
  6. Marine Biological Laboratory
  7. Pennsylvania State University
  8. USDA Forest Service
  9. University of California, Davis
  10. Duke University
  11. North Carolina State University
  12. Lawrence Berkeley National Laboratory (LBNL)
  13. University of Nebraska
  14. University of Nebraska, Lincoln
  15. Argonne National Laboratory (ANL)
  16. University of Minnesota
  17. University of Colorado, Boulder
  18. Ohio State University, The, Columbus
  19. Smithsonian Environmental Research Center, Edgewater, MD
  20. ORNL
  21. University of New Mexico, Albuquerque
  22. University of Florida, Gainesville
  23. NOAA, Oak Ridge, TN
  24. San Diego State University
  25. Indiana University
  26. USDA ARS
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Oak Ridge National Environmental Research Park
Sponsoring Org.:
USDOE
OSTI Identifier:
1015080
DOE Contract Number:  
DE-AC05-00OR22725
Resource Type:
Journal Article
Journal Name:
Agricultural and Forest Meteorology
Additional Journal Information:
Journal Volume: 151; Journal Issue: 1; Journal ID: ISSN 0168-1923
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; CARBON; CARBON CYCLE; CARBON DIOXIDE; CARBON SINKS; CLIMATIC CHANGE; DISTRIBUTION; DISTURBANCES; DROUGHTS; ECOSYSTEMS; FORESTS; HURRICANES; RESOLUTION; SATELLITES; SAVANNAS; TERRESTRIAL ECOSYSTEMS

Citation Formats

Zhuang, Qianlai, Law, Beverly E, Baldocchi, Dennis, Ma, Siyan, Chen, Jiquan, Richardson, Andrew, Melillo, Jerry, Davis, Ken J, Hollinger, D, Wharton, Sonia, Falk, Matthias, Paw, U Kyaw Tha, Oren, Ram, Katulk, Gabriel G, Noormets, Asko, Fischer, Marc, Verma, Shashi, Suyker, A E, Cook, David R, Sun, G, McNulty, Steven G, Wofsy, Steve, Bolstad, Paul V, Burns, Sean, Monson, Russell K, Curtis, Peter, Drake, Bert G, Foster, David R, Gu, Lianhong, Hadley, Julian L, Litvak, Marcy, Martin, Timothy A, Matamala, Roser, Meyers, Tilden, Oechel, Walter C, Schmid, H P, Scott, Russell L, and Torn, Margaret S. Assessing net ecosystem carbon exchange of U S terrestrial ecosystems by integrating eddy covariance flux measurements and satellite observations. United States: N. p., 2011. Web.
Zhuang, Qianlai, Law, Beverly E, Baldocchi, Dennis, Ma, Siyan, Chen, Jiquan, Richardson, Andrew, Melillo, Jerry, Davis, Ken J, Hollinger, D, Wharton, Sonia, Falk, Matthias, Paw, U Kyaw Tha, Oren, Ram, Katulk, Gabriel G, Noormets, Asko, Fischer, Marc, Verma, Shashi, Suyker, A E, Cook, David R, Sun, G, McNulty, Steven G, Wofsy, Steve, Bolstad, Paul V, Burns, Sean, Monson, Russell K, Curtis, Peter, Drake, Bert G, Foster, David R, Gu, Lianhong, Hadley, Julian L, Litvak, Marcy, Martin, Timothy A, Matamala, Roser, Meyers, Tilden, Oechel, Walter C, Schmid, H P, Scott, Russell L, & Torn, Margaret S. Assessing net ecosystem carbon exchange of U S terrestrial ecosystems by integrating eddy covariance flux measurements and satellite observations. United States.
Zhuang, Qianlai, Law, Beverly E, Baldocchi, Dennis, Ma, Siyan, Chen, Jiquan, Richardson, Andrew, Melillo, Jerry, Davis, Ken J, Hollinger, D, Wharton, Sonia, Falk, Matthias, Paw, U Kyaw Tha, Oren, Ram, Katulk, Gabriel G, Noormets, Asko, Fischer, Marc, Verma, Shashi, Suyker, A E, Cook, David R, Sun, G, McNulty, Steven G, Wofsy, Steve, Bolstad, Paul V, Burns, Sean, Monson, Russell K, Curtis, Peter, Drake, Bert G, Foster, David R, Gu, Lianhong, Hadley, Julian L, Litvak, Marcy, Martin, Timothy A, Matamala, Roser, Meyers, Tilden, Oechel, Walter C, Schmid, H P, Scott, Russell L, and Torn, Margaret S. Sat . "Assessing net ecosystem carbon exchange of U S terrestrial ecosystems by integrating eddy covariance flux measurements and satellite observations". United States.
@article{osti_1015080,
title = {Assessing net ecosystem carbon exchange of U S terrestrial ecosystems by integrating eddy covariance flux measurements and satellite observations},
author = {Zhuang, Qianlai and Law, Beverly E and Baldocchi, Dennis and Ma, Siyan and Chen, Jiquan and Richardson, Andrew and Melillo, Jerry and Davis, Ken J and Hollinger, D and Wharton, Sonia and Falk, Matthias and Paw, U Kyaw Tha and Oren, Ram and Katulk, Gabriel G and Noormets, Asko and Fischer, Marc and Verma, Shashi and Suyker, A E and Cook, David R and Sun, G and McNulty, Steven G and Wofsy, Steve and Bolstad, Paul V and Burns, Sean and Monson, Russell K and Curtis, Peter and Drake, Bert G and Foster, David R and Gu, Lianhong and Hadley, Julian L and Litvak, Marcy and Martin, Timothy A and Matamala, Roser and Meyers, Tilden and Oechel, Walter C and Schmid, H P and Scott, Russell L and Torn, Margaret S},
abstractNote = {More accurate projections of future carbon dioxide concentrations in the atmosphere and associated climate change depend on improved scientific understanding of the terrestrial carbon cycle. Despite the consensus that U.S. terrestrial ecosystems provide a carbon sink, the size, distribution, and interannual variability of this sink remain uncertain. Here we report a terrestrial carbon sink in the conterminous U.S. at 0.63 pg C yr 1 with the majority of the sink in regions dominated by evergreen and deciduous forests and savannas. This estimate is based on our continuous estimates of net ecosystem carbon exchange (NEE) with high spatial (1 km) and temporal (8-day) resolutions derived from NEE measurements from eddy covariance flux towers and wall-to-wall satellite observations from Moderate Resolution Imaging Spectroradiometer (MODIS). We find that the U.S. terrestrial ecosystems could offset a maximum of 40% of the fossil-fuel carbon emissions. Our results show that the U.S. terrestrial carbon sink varied between 0.51 and 0.70 pg C yr 1 over the period 2001 2006. The dominant sources of interannual variation of the carbon sink included extreme climate events and disturbances. Droughts in 2002 and 2006 reduced the U.S. carbon sink by 20% relative to a normal year. Disturbances including wildfires and hurricanes reduced carbon uptake or resulted in carbon release at regional scales. Our results provide an alternative, independent, and novel constraint to the U.S. terrestrial carbon sink.},
doi = {},
url = {https://www.osti.gov/biblio/1015080}, journal = {Agricultural and Forest Meteorology},
issn = {0168-1923},
number = 1,
volume = 151,
place = {United States},
year = {2011},
month = {1}
}