Land Use and Nature-Based Climate Adaptation in Coastal and Island Regions: A Case Study of Muan and Shinan, South Korea

This study examines the relationships between land use, climate, and nature-based adaptation in coastal and island regions of South Korea, focusing on the counties of Muan and Shinan along the southwest coast. Using land use data (2014) and meteorological data (2001–2010), Spearman correlation analysis was applied to assess the associations between six land-use categories and eight climatic indicators, including temperature extremes, tropical nights, and precipitation patterns. Results show that built-up and agricultural areas are closely linked to higher maximum temperatures and more frequent heatwaves, indicating greater climatic vulnerability. Conversely, wetlands, and bare lands demonstrate significant cooling effects, acting as natural buffers against rising temperatures. Wetlands play dual roles in supporting initial hydrological heat mitigation but enhancing nocturnal heat retention during prolonged heatwaves. Forests and grasslands emerged as important land-use types that can help reduce the number of tropical night days. These findings underscore the importance of nature-based land management—such as forest expansion, wetland conservation, and vegetation restoration—for mitigating heat stress and enhancing climate resilience. This study calls for extending national climate adaptation policies beyond urban areas to support aging, and therefore vulnerable, coastal and island populations facing the intensifying effects of climate change.