Enhanced North American carbon uptake associated with El Nino

Details

• Journal Title:
  Science Advances
• Personal Author:
  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.
• NOAA Program & Office:
  OAR (Oceanic and Atmospheric Research) ; ESRL (Earth System Research Laboratory) ; GML (Global Monitoring Laboratory) ; CIRES (Cooperative Institute for Research in Environmental Sciences)
• Description:
  Long-term atmospheric CO2 mole fraction and delta(CO2)-C-13 observations over North America document persistent responses to the El Nino-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 Nino than during La Nina between 2007 and 2015, partially offsetting increases of net tropical biosphere-to-atmosphere carbon flux around El Nino. 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 Nino.
• Keywords:
  Atmospheric Science Carbon Dioxide El Niño Current Atmospheric Science Carbon Dioxide
• Source:
  Science Advances, 5(6) 2019
• DOI:
  https://doi.org/10.1126/sciadv.aaw0076
• Pubmed Central ID:
  PMC6551193
• Document Type:
  Journal Article
• Place as Subject:
  North America
• Rights Information:
  CC BY
• Compliance:
  PMC
• Main Document Checksum:
  urn:sha-512:37db3f7e6e69f954842ad8379758663d2b68680d856e418987ddd640b0b62e73a07fe1c1b46efe973c577c209aa4d96ccf1e978cb3522d6a7f6165acf8e80103
• Download URL:
  https://repository.library.noaa.gov/view/noaa/24715/noaa_24715_DS1.pdf
• File Type:
  [PDF - 4.21 MB ]