Biogeosciences
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Articles | Volume 21, issue 9
Articles | Volume 21, issue 9
https://doi.org/10.5194/bg-21-2273-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
Special issue:
https://doi.org/10.5194/bg-21-2273-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 21, issue 9
Research article
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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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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.
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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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Drought, society, and ecosystems (NHESS/BG/GC/HESS inter-journal...
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