24STUDENT Assessing Current Trends and Downscaling of Moist Heatwaves in Southern Vietnam and Cambodia to Uncover Formation Mechanisms and Dynamic

This study investigates the current trends and downscaling of moist heatwaves (HW) in Southern Vietnam and Cambodia (from 102°E to 110°E longitude and 8°N to 16°N latitude), and it is part of the combined aim with physical understanding to develop a vulnerability assessment framework. The urgent need for localized insights into these extreme events is addressed, as moist HW, characterized by high temperatures and high humidity, has become increasingly frequent and severe due to global warming, posing significant risks to health, agriculture, and infrastructure. Previous studies have highlighted this need, and our research employs advanced downscaling techniques to overcome the limitations of coarse-resolution datasets such as CORDEX SEA and CMIP6 and limitations in gaining the formation of HW. This approach enables a more precise analysis of historical data and future projections, which is crucial for understanding the dynamics of moist HW in this vulnerable region with the Bias-Corrected Spatial Downscaling (BCDS) method. Taking advantage of that, we trace the Clausius-Clapeyron scaling relationship, which significantly helps to understand how temperature changes affect the capacity of the atmosphere to hold moisture and compound events between moist HW and extreme precipitation, noting that increased moisture can lead to more intense and frequent precipitation events if conditions favor cloud or thunderstorm formation. The findings are expected to enhance regional climate resilience and inform targeted strategies for mitigating the adverse effects of moist HW in the study region, especially in combination with moist HW. Several extreme climate patterns remain poorly understood when evaluated as complex occurrences.