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Tropical forests did not recover from the strong 2015–2016 El Niño event

Abstract : Severe drought and extreme heat associated with the 2015–2016 El Niño event have led to large carbon emissions from the tropical vegetation to the atmosphere. With the return to normal climatic conditions in 2017, tropical forest aboveground carbon (AGC) stocks are expected to partly recover due to increased productivity, but the intensity and spatial distribution of this recovery are unknown. We used low-frequency microwave satellite data (L-VOD) to feature precise monitoring of AGC changes and show that the AGC recovery of tropical ecosystems was slow and that by the end of 2017, AGC had not reached predrought levels of 2014. From 2014 to 2017, tropical AGC stocks decreased by 1.31.51.2 Pg C due to persistent AGC losses in Africa (−0.9−0.8−1.1 Pg C) and America (−0.5−0.4−0.6 Pg C). Pantropically, drylands recovered their carbon stocks to pre–El Niño levels, but African and American humid forests did not, suggesting carryover effects from enhanced forest mortality.
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Submitted on : Tuesday, October 27, 2020 - 3:50:40 PM
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Jean-Pierre Wigneron, Lei Fan, Philippe Ciais, Ana Bastos, Martin Brandt, et al.. Tropical forests did not recover from the strong 2015–2016 El Niño event. Science Advances , American Association for the Advancement of Science (AAAS), 2020, 6 (6), pp.1-10. ⟨10.1126/sciadv.aay4603⟩. ⟨hal-02624303⟩

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