As with other tropical countries, Thailand is vulnerable to the irreversible impacts of climate change, such as temperature rises, precipitation changes, saltwater intrusion, and coastal erosion. Dr Pornampai Narenpitak, from Thailand’s National Science and Technology Development Agency, will lead a team to assess whether two SRM approaches – stratospheric aerosol injection (SAI) and marine cloud brightening (MCB) – could reduce those risks in the Chao Phraya River, which flows through the central lowland area. While prior studies have shown SRM could lower surface temperatures in Thailand, it could also reduce levels of precipitation. This study will compare temperature and precipitation changes under a range of scenarios, as well as monsoon circulation, water salinity, and the impacts on coastal ecosystems.