Future malaria environmental suitability in Africa is sensitive to hydrology

Science. 2024 May 10;384(6696):697-703. doi: 10.1126/science.adk8755. Epub 2024 May 9.

Abstract

Changes in climate shift the geographic locations that are suitable for malaria transmission because of the thermal constraints on vector Anopheles mosquitos and Plasmodium spp. malaria parasites and the lack of availability of surface water for vector breeding. Previous Africa-wide assessments have tended to solely represent surface water using precipitation, ignoring many important hydrological processes. Here, we applied a validated and weighted ensemble of global hydrological and climate models to estimate present and future areas of hydroclimatic suitability for malaria transmission. With explicit surface water representation, we predict a net decrease in areas suitable for malaria transmission from 2025 onward, greater sensitivity to future greenhouse gas emissions, and different, more complex, malaria transmission patterns. Areas of malaria transmission that are projected to change are smaller than those estimated by precipitation-based estimates but are associated with greater changes in transmission season lengths.

Publication types

  • Research Support, Non-U.S. Gov't
  • Research Support, N.I.H., Extramural
  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Africa / epidemiology
  • Animals
  • Anopheles* / parasitology
  • Climate Change*
  • Epidemiological Models
  • Greenhouse Gases / analysis
  • Humans
  • Hydrology*
  • Malaria* / transmission
  • Mosquito Vectors* / parasitology
  • Plasmodium
  • Rain
  • Seasons
  • Water* / parasitology

Substances

  • Greenhouse Gases
  • Water