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Title: Enhanced North American carbon uptake associated with El Niño

Abstract

Long-term atmospheric CO 2mole fraction and δ 13CO 2 observations over North America document persistent responses to the El Niño–Southern Oscillation. We estimate these responses corresponded to 0.61 (0.45 to 0.79) PgC year –1 more North American carbon uptake during El Niño than during La Niña between 2007 and 2015, partially offsetting increases of net tropical biosphere-to-atmosphere carbon flux around El Niño. Anomalies in derived North American net ecosystem exchange (NEE) display strong but opposite correlations with surface air temperature between seasons, while their correlation with water availability was more constant throughout the year, such that water availability is the dominant control on annual NEE variability over North America. These results suggest that increased water availability and favorable temperature conditions (warmer spring and cooler summer) caused enhanced carbon uptake over North America near and during El Niño.

Authors:
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [2]; ORCiD logo [2]; ORCiD logo [2]; ORCiD logo [3];  [2]; ORCiD logo [2]; ORCiD logo [4]; ORCiD logo [5]; ORCiD logo [5]; ORCiD logo [2];  [1];  [1];  [1];  [6]; ORCiD logo [7];  [7];  [8]; ORCiD logo [6] more »; ORCiD logo [6]; ORCiD logo [9]; ORCiD logo [1];  [10] « less
  1. Univ. of Colorado, Boulder, CO (United States); National Oceanic and Atmospheric Administration (NOAA), Boulder, CO (United States). Earth System Research Lab.
  2. National Oceanic and Atmospheric Administration (NOAA), Boulder, CO (United States). Earth System Research Lab.
  3. Carnegie Inst. of Science, Stanford, CA (United States); Stanford Univ., CA (United States)
  4. Carnegie Inst. of Science, Stanford, CA (United States)
  5. Atmospheric and Environmental Research, Lexington, MA (United States)
  6. Univ. of Colorado, Boulder, CO (United States)
  7. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  8. Environment and Climate Change Canada, Toronto, ON (Canada)
  9. California Inst. of Technology (CalTech), Pasadena, CA (United States)
  10. Univ. of Colorado, Boulder, CO (United States); National Oceanic and Atmospheric Administration (NOAA), Boulder, CO (United States). Earth System Research Lab.; Vrije Univ., Amsterdam (Netherlands)
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Biological and Environmental Research (BER) (SC-23); National Aeronautics and Space Administration (NASA); National Oceanic and Atmospheric Administration (NOAA)
OSTI Identifier:
1559226
Grant/Contract Number:  
AC02-05CH11231; NNH12AU27I; NNX12AM97G; NNH12CG54C; NNH14AY37I; NNH16AC91
Resource Type:
Accepted Manuscript
Journal Name:
Science Advances
Additional Journal Information:
Journal Volume: 5; Journal Issue: 6; Journal ID: ISSN 2375-2548
Publisher:
AAAS
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES

Citation Formats

Hu, Lei, Andrews, Arlyn E., Thoning, Kirk W., Sweeney, Colm, Miller, John B., Michalak, Anna M., Dlugokencky, Ed, Tans, Pieter P., Shiga, Yoichi P., Mountain, Marikate, Nehrkorn, Thomas, Montzka, Stephen A., McKain, Kathryn, Kofler, Jonathan, Trudeau, Michael, Michel, Sylvia E., Biraud, Sébastien C., Fischer, Marc L., Worthy, Doug E. J., Vaughn, Bruce H., White, James W. C., Yadav, Vineet, Basu, Sourish, and van der Velde, Ivar R. Enhanced North American carbon uptake associated with El Niño. United States: N. p., 2019. Web. doi:10.1126/sciadv.aaw0076.
Hu, Lei, Andrews, Arlyn E., Thoning, Kirk W., Sweeney, Colm, Miller, John B., Michalak, Anna M., Dlugokencky, Ed, Tans, Pieter P., Shiga, Yoichi P., Mountain, Marikate, Nehrkorn, Thomas, Montzka, Stephen A., McKain, Kathryn, Kofler, Jonathan, Trudeau, Michael, Michel, Sylvia E., Biraud, Sébastien C., Fischer, Marc L., Worthy, Doug E. J., Vaughn, Bruce H., White, James W. C., Yadav, Vineet, Basu, Sourish, & van der Velde, Ivar R. Enhanced North American carbon uptake associated with El Niño. United States. doi:10.1126/sciadv.aaw0076.
Hu, Lei, Andrews, Arlyn E., Thoning, Kirk W., Sweeney, Colm, Miller, John B., Michalak, Anna M., Dlugokencky, Ed, Tans, Pieter P., Shiga, Yoichi P., Mountain, Marikate, Nehrkorn, Thomas, Montzka, Stephen A., McKain, Kathryn, Kofler, Jonathan, Trudeau, Michael, Michel, Sylvia E., Biraud, Sébastien C., Fischer, Marc L., Worthy, Doug E. J., Vaughn, Bruce H., White, James W. C., Yadav, Vineet, Basu, Sourish, and van der Velde, Ivar R. Wed . "Enhanced North American carbon uptake associated with El Niño". United States. doi:10.1126/sciadv.aaw0076. https://www.osti.gov/servlets/purl/1559226.
@article{osti_1559226,
title = {Enhanced North American carbon uptake associated with El Niño},
author = {Hu, Lei and Andrews, Arlyn E. and Thoning, Kirk W. and Sweeney, Colm and Miller, John B. and Michalak, Anna M. and Dlugokencky, Ed and Tans, Pieter P. and Shiga, Yoichi P. and Mountain, Marikate and Nehrkorn, Thomas and Montzka, Stephen A. and McKain, Kathryn and Kofler, Jonathan and Trudeau, Michael and Michel, Sylvia E. and Biraud, Sébastien C. and Fischer, Marc L. and Worthy, Doug E. J. and Vaughn, Bruce H. and White, James W. C. and Yadav, Vineet and Basu, Sourish and van der Velde, Ivar R.},
abstractNote = {Long-term atmospheric CO2mole fraction and δ13CO2 observations over North America document persistent responses to the El Niño–Southern Oscillation. We estimate these responses corresponded to 0.61 (0.45 to 0.79) PgC year–1 more North American carbon uptake during El Niño than during La Niña between 2007 and 2015, partially offsetting increases of net tropical biosphere-to-atmosphere carbon flux around El Niño. Anomalies in derived North American net ecosystem exchange (NEE) display strong but opposite correlations with surface air temperature between seasons, while their correlation with water availability was more constant throughout the year, such that water availability is the dominant control on annual NEE variability over North America. These results suggest that increased water availability and favorable temperature conditions (warmer spring and cooler summer) caused enhanced carbon uptake over North America near and during El Niño.},
doi = {10.1126/sciadv.aaw0076},
journal = {Science Advances},
number = 6,
volume = 5,
place = {United States},
year = {2019},
month = {6}
}

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