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A Machine Learning-Based Dynamic SST Index for Long-Lead Malaria Prediction in the Peruvian Amazon
Mengxin Pan1,2, Shineng Hu1, Mark M Janko3
1Nicholas School of the Environment Duke University Durham NC USA.
Tropical sea surface temperature (SST) variability can predict malaria in the Peruvian Amazon. A new machine learning model using a dynamic SST index offers improved long-lead malaria forecasting over traditional methods.
Area of Science:
- Environmental science
- Epidemiology
- Machine learning
Background:
- Malaria poses a significant health challenge in the Peruvian Amazon.
- Early warning systems are crucial for effective malaria prevention and control.
Purpose of the Study:
- To develop a machine learning methodology for predicting malaria in the Peruvian Amazon using tropical sea surface temperature (SST) variability.
- To identify a dynamic SST index for improved malaria prediction with long lead times.
Main Methods:
- Correlating tropical SST anomalies with Peruvian malaria occurrence across seasons and time lags.
- Utilizing self-organizing maps to synthesize SST-malaria relationships and derive a dynamic SST index.
- Comparing the performance of the dynamic SST index against the traditional El Niño-Southern Oscillation (ENSO) index in a generalized linear model.
Main Results:
- Significant correlations were found between tropical SST anomalies and Peruvian malaria.
- The dynamic SST index demonstrated superior performance (higher correlation, lower RMSE) compared to the ENSO index for malaria prediction.
- The dynamic SST index, linked to the Pacific Meridional Mode, influences local temperature and humidity, providing a plausible mechanism for prediction.
Conclusions:
- Tropical SST variability offers potential for long-lead malaria prediction in the Peruvian Amazon.
- The developed machine learning approach and dynamic SST index provide a more effective tool for malaria forecasting.
- Open-source code is provided for broader applications in climate-sensitive disease transmission research.
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