Enhanced North American carbon uptake associated with El Niño.

Autor: Hu L; Cooperative Institute for Research in Environmental Sciences, University of Colorado-Boulder, Boulder, CO, USA.; Global Monitoring Division, Earth System Research Laboratory, NOAA, Boulder, CO, USA., Andrews AE; Global Monitoring Division, Earth System Research Laboratory, NOAA, Boulder, CO, USA., Thoning KW; Global Monitoring Division, Earth System Research Laboratory, NOAA, Boulder, CO, USA., Sweeney C; Global Monitoring Division, Earth System Research Laboratory, NOAA, Boulder, CO, USA., Miller JB; Global Monitoring Division, Earth System Research Laboratory, NOAA, Boulder, CO, USA., Michalak AM; Department of Global Ecology, Carnegie Institution for Science, Stanford, CA, USA.; Department of Earth System Science, Stanford University, Stanford, CA, USA., Dlugokencky E; Global Monitoring Division, Earth System Research Laboratory, NOAA, Boulder, CO, USA., Tans PP; Global Monitoring Division, Earth System Research Laboratory, NOAA, Boulder, CO, USA., Shiga YP; Department of Global Ecology, Carnegie Institution for Science, Stanford, CA, USA., Mountain M; Atmospheric and Environmental Research, Lexington, MA, USA., Nehrkorn T; Atmospheric and Environmental Research, Lexington, MA, USA., Montzka SA; Global Monitoring Division, Earth System Research Laboratory, NOAA, Boulder, CO, USA., McKain K; Cooperative Institute for Research in Environmental Sciences, University of Colorado-Boulder, Boulder, CO, USA.; Global Monitoring Division, Earth System Research Laboratory, NOAA, Boulder, CO, USA., Kofler J; Cooperative Institute for Research in Environmental Sciences, University of Colorado-Boulder, Boulder, CO, USA.; Global Monitoring Division, Earth System Research Laboratory, NOAA, Boulder, CO, USA., Trudeau M; Cooperative Institute for Research in Environmental Sciences, University of Colorado-Boulder, Boulder, CO, USA.; Global Monitoring Division, Earth System Research Laboratory, NOAA, Boulder, CO, USA., Michel SE; Institute of Arctic and Alpine Research, University of Colorado-Boulder, Boulder, CO, USA., Biraud SC; Earth and Environmental Sciences Area, Lawrence Berkeley National Laboratory, Berkeley, CA, USA., Fischer ML; Environmental Technologies Area, Lawrence Berkeley National Laboratory, Berkeley, CA, USA., Worthy DEJ; Environment and Climate Change Canada, Toronto, ON, Canada., Vaughn BH; Institute of Arctic and Alpine Research, University of Colorado-Boulder, Boulder, CO, USA., White JWC; Institute of Arctic and Alpine Research, University of Colorado-Boulder, Boulder, CO, USA., Yadav V; Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, USA., Basu S; Cooperative Institute for Research in Environmental Sciences, University of Colorado-Boulder, Boulder, CO, USA.; Global Monitoring Division, Earth System Research Laboratory, NOAA, Boulder, CO, USA., van der Velde IR; Cooperative Institute for Research in Environmental Sciences, University of Colorado-Boulder, Boulder, CO, USA.; Global Monitoring Division, Earth System Research Laboratory, NOAA, Boulder, CO, USA.; Faculty of Science, VU University Amsterdam, Amsterdam, Netherlands.
Jazyk: angličtina
Zdroj: Science advances [Sci Adv] 2019 Jun 05; Vol. 5 (6), pp. eaaw0076. Date of Electronic Publication: 2019 Jun 05 (Print Publication: 2019).
DOI: 10.1126/sciadv.aaw0076
Abstrakt: Long-term atmospheric CO 2 mole fraction and δ 13 CO 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.
Databáze: MEDLINE