Positive Indian Ocean Dipole intensifies marine heatwaves in the tropical southeast Atlantic coastal region
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View abstract on PubMed
Summary
This summary is machine-generated.Marine heatwaves (MHWs) in the tropical southeast Atlantic are intensified by the positive Indian Ocean Dipole (pIOD). This occurs via altered winds and river discharge, impacting marine ecosystems and productivity.
Area Of Science
- Oceanography
- Climate Science
- Marine Ecology
Background
- Marine heatwaves (MHWs) pose significant threats to marine ecosystems and productivity.
- The tropical southeast Atlantic (TSEA) coast is particularly vulnerable to MHW impacts.
Purpose Of The Study
- To investigate the influence of the positive Indian Ocean Dipole (pIOD) on TSEA coastal MHWs.
- To identify the mechanisms through which pIOD affects MHW formation.
- To develop a predictive model for TSEA MHWs.
Main Methods
- Observational data analysis.
- Numerical oceanographic model experiments.
- Development of an empirical predictive model.
Main Results
- The positive Indian Ocean Dipole (pIOD) intensifies TSEA coastal MHWs during austral summer.
- pIOD-induced westerly wind anomalies deepen the thermocline via Kelvin waves.
- Increased Congo River discharge due to pIOD leads to a shallower mixed layer, promoting MHWs.
- An empirical model using pIOD shows high predictive skill for TSEA MHWs with a 3-month lead time.
Conclusions
- The positive Indian Ocean Dipole (pIOD) is a key driver of TSEA coastal MHWs.
- Understanding these teleconnections is crucial for marine hazard forecasting.
- Climate warming may amplify pIOD's influence on MHWs, necessitating proactive adaptation strategies.
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