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Updated: Feb 25, 2026

Simulating Impacts of Ice Storms on Forest Ecosystems

Simulating Impacts of Ice Storms on Forest Ecosystems

Published on: June 30, 2020

Amazon deforestation weakens Atlantic Niño variability.

Shengbiao Wei^1,2,3, Chunzai Wang^1,2,3, Wenju Cai^4,5

¹State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China.

Nature Communications

|February 23, 2026

Summary

This summary is machine-generated.

Amazon deforestation has weakened Atlantic Niño variability by ~23% since 1970. This land use change alters tropical Atlantic thermal contrast, impacting ocean-atmosphere dynamics and climate patterns.

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Area of Science:

Earth System Science
Climate Dynamics
Oceanography

Background:

The Amazon Basin has experienced significant deforestation since the 1970s, leading to ecological and climatic consequences.
The specific impact of this deforestation on tropical ocean-atmosphere coupled variability, such as Atlantic Niño, remains poorly understood.

Purpose of the Study:

To investigate the influence of Amazon deforestation on the weakening of Atlantic Niño variability.
To quantify the contribution of deforestation to observed changes in tropical Atlantic climate dynamics.

Main Methods:

Utilized observational datasets to analyze trends in Atlantic Niño variability and related climate variables.
Conducted targeted coupled general circulation model experiments to simulate the effects of deforestation on ocean-atmosphere interactions.

Main Results:

Amazon deforestation has contributed approximately 23% to the weakening of Atlantic Niño variability since 1970.
Deforestation-induced local warming and drying enhance interhemispheric thermal contrast, strengthening cross-equatorial winds.
This process weakens the Bjerknes feedback, a key mechanism driving Atlantic Niño variability.

Conclusions:

Land surface changes in the Amazon critically influence the tropical coupled ocean-atmosphere system.
Deforestation plays a substantial role in modulating tropical Atlantic climate variability, with implications for regional and potentially global climate patterns.