Sélection du moment:
Veille 2.1
Résultats pour:
Laibao Liu, ETH Zurich, Institute for Atmospheric and Climate Science, ETH Zurich, Zurich, Switzerland, Philippe Ciais, CEA-CNRS-UVSQ, Université Paris Saclay, Laboratoire des Sciences du Climat et de l’Environnement, CEA-CNRS-UVSQ, Université Paris Saclay, Gif-sur-Yvette, France, Mengxi Wu, University of California, Los Angeles, Joint Institute for Regional Earth System Science and Engineering (JIFRESSE), University of California, Los Angeles, Los Angeles, USA, Ryan S. Padrón, ETH Zurich, Institute for Atmospheric and Climate Science, ETH Zurich, Zurich, Switzerland, Pierre Friedlingstein, University of Exeter, College of Engineering, Mathematics and Physical Sciences, University of Exeter, Exeter, UK, Jonas Schwaab, ETH Zurich, Institute for Atmospheric and Climate Science, ETH Zurich, Zurich, Switzerland, Lukas Gudmundsson, ETH Zurich, Institute for Atmospheric and Climate Science, ETH Zurich, Zurich, Switzerland, Sonia I. Seneviratne, ETH Zurich, Institute for Atmospheric and Clima
Terrestrial ecosystems have taken up about 32% of the total anthropogenic CO2 emissions in the past six decades1. Large uncertainties in terrestrial carbon–climate feedbacks, however, make it difficult to predict how the land carbon sink will respond to future climate change2. Interannual variations in the atmospheric CO2 growth rate (CGR) are dominated by land–atmosphere carbon fluxes in the tropics, providing an opportunity to explore land carbon–climate interactions3–6. It is thought that variations in CGR are largely controlled by temperature7–10 but there is also evidence for a tight coupling between water availability and CGR11. Here, we use a record of global atmospheric CO2, terrestrial water storage and precipitation data to investigate changes in the interannual relationship between tropical land climate conditions and CGR under a changing climate. We find that the interannual relationship between tropical water availability and CGR became increasingly negative during 1989–2018 compared to 1960–1989