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Changes in net ecosystem exchange over Europe during the 2018 drought based on atmospheric observations.
Thompson, R L; Broquet, G; Gerbig, C; Koch, T; Lang, M; Monteil, G; Munassar, S; Nickless, A; Scholze, M; Ramonet, M; Karstens, U; van Schaik, E; Wu, Z; Rödenbeck, C.
Afiliação
  • Thompson RL; ATMOS, NILU - Norsk Institutt for Luftforskning, Kjeller, Norway.
  • Broquet G; Laboratoire des Sciences du Climat et de l'Environnement, LSCE/IPSL, CEA-CNRS-UVSQ, Université Paris-Saclay, Gif sur Yvette, France.
  • Gerbig C; Biogeochemical Signals, Max Planck Institute for Biogeochemistry, Jena, Germany.
  • Koch T; Biogeochemical Signals, Max Planck Institute for Biogeochemistry, Jena, Germany.
  • Lang M; Meteorologisches Observatorium Hohenpeissenberg, Deutscher Wetterdienst, Germany.
  • Monteil G; Laboratoire des Sciences du Climat et de l'Environnement, LSCE/IPSL, CEA-CNRS-UVSQ, Université Paris-Saclay, Gif sur Yvette, France.
  • Munassar S; Department of Physical Geography and Ecosystem Science, Lund University, Lund, Sweden.
  • Nickless A; Biogeochemical Signals, Max Planck Institute for Biogeochemistry, Jena, Germany.
  • Scholze M; School of Chemistry, University of Bristol, Bristol, UK.
  • Ramonet M; Department of Physical Geography and Ecosystem Science, Lund University, Lund, Sweden.
  • Karstens U; Laboratoire des Sciences du Climat et de l'Environnement, LSCE/IPSL, CEA-CNRS-UVSQ, Université Paris-Saclay, Gif sur Yvette, France.
  • van Schaik E; ICOS Carbon Portal, Lund University, Sweden.
  • Wu Z; Meteorology and Air Quality, Wageningen University and Research, Wageningen, The Netherlands.
  • Rödenbeck C; Department of Physical Geography and Ecosystem Science, Lund University, Lund, Sweden.
Philos Trans R Soc Lond B Biol Sci ; 375(1810): 20190512, 2020 10 26.
Article em En | MEDLINE | ID: mdl-32892731
The 2018 drought was one of the worst European droughts of the twenty-first century in terms of its severity, extent and duration. The effects of the drought could be seen in a reduction in harvest yields in parts of Europe, as well as an unprecedented browning of vegetation in summer. Here, we quantify the effect of the drought on net ecosystem exchange (NEE) using five independent regional atmospheric inversion frameworks. Using a network of atmospheric CO2 mole fraction observations, we estimate NEE with at least monthly and 0.5° × 0.5° resolution for 2009-2018. We find that the annual NEE in 2018 was likely more positive (less CO2 uptake) in the temperate region of Europe by 0.09 ± 0.06 Pg C yr-1 (mean ± s.d.) compared to the mean of the last 10 years of -0.08 ± 0.17 Pg C yr-1, making the region close to carbon neutral in 2018. Similarly, we find a positive annual NEE anomaly for the northern region of Europe of 0.02 ± 0.02 Pg C yr-1 compared the 10-year mean of -0.04 ± 0.05 Pg C yr-1. In both regions, this was largely owing to a reduction in the summer CO2 uptake. The positive NEE anomalies coincided spatially and temporally with negative anomalies in soil water. These anomalies were exceptional for the 10-year period of our study. This article is part of the theme issue 'Impacts of the 2018 severe drought and heatwave in Europe: from site to continental scale'.
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Texto completo: 1 Base de dados: MEDLINE Assunto principal: Atmosfera / Carbono / Ecossistema / Secas / Ciclo do Carbono Idioma: En Ano de publicação: 2020 Tipo de documento: Article

Texto completo: 1 Base de dados: MEDLINE Assunto principal: Atmosfera / Carbono / Ecossistema / Secas / Ciclo do Carbono Idioma: En Ano de publicação: 2020 Tipo de documento: Article