This is a Preprint and has not been peer reviewed. This is version 1 of this Preprint.
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Abstract
In 2023, an unprecedented drought and heatwave severely impacted Amazon waters, leading to high mortality of fishes and river dolphins. Five of 10 lakes monitored showed exceptionally high daytime temperatures (>37°C), with one large lake reaching up to 41°C in the entire ~2-m deep water column, with up to 13°C of diel variation. Modeling show that high solar radiation, reduced water depth and wind speed, and turbid waters are the main drivers of the high temperatures. This extreme heating of Amazon waters follows a long-term increase of 0.6°C/decade revealed by satellite estimates across the region’s lakes between 1990 and 2023. With ongoing climate change, temperatures that approach or exceed thermal tolerances for aquatic life are likely to become more common in tropical aquatic systems.
DOI
https://doi.org/10.31223/X56D9T
Subjects
Physical Sciences and Mathematics
Keywords
drought, Amazon Basin, Aquatic Animal Mortality, Lake Heatwave
Dates
Published: 2024-07-22 05:48
Last Updated: 2024-07-22 12:48
License
CC-BY Attribution-No Derivatives 4.0 International
Additional Metadata
Conflict of interest statement:
None
Data Availability (Reason not available):
All in situ data (water temperature) used in this article will be deposited into Zenodo platform before final publication in a peer-reviewed journal. Remote sensing data can be assessed in the GitHub link: < https://github.com/leolaipelt/water_surface_temperature
>. Codes used for remote sensing data processing are available at: < https://github.com/leolaipelt/water_surface_temperature
>.
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