Articles | Volume 21, issue 9
https://doi.org/10.5194/bg-21-2273-2024
https://doi.org/10.5194/bg-21-2273-2024
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08 May 2024
Research article | Highlight paper |  | 08 May 2024

Drought and radiation explain fluctuations in Amazon rainforest greenness during the 2015–2016 drought

Yi Y. Liu, Albert I. J. M. van Dijk, Patrick Meir, and Tim R. McVicar

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Latest update: 05 Oct 2024
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The 2015–2016 Amazon drought, marked by a year-long precipitation shortfall, uniquely impacted rainforest greenness, challenging prior observations. Leveraging water storage, temperature, and moisture demand data analysis, this study elucidates over 70% of the canopy's response, refining our understanding of rainforest resilience and forecasting capabilities under extreme drought scenarios.
Short summary
Greenness of the Amazon forest fluctuated during the 2015–2016 drought, but no satisfactory explanation has been found. Based on water storage, temperature, and atmospheric moisture demand, we developed a method to delineate the regions where forests were under stress. These drought-affected regions were mainly identified at the beginning and end of the drought, resulting in below-average greenness. For the months in between, without stress, greenness responded positively to intense sunlight.
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