Central and South America, including regions with complex topography such as the Andes, are subject to high impact weather events associated with interactions between multiple hydroclimatic and orographic factors, but also anthropic activities. These interactions lead to phenomena such as mesoscale convective events and cold air intrusions, which cause extreme precipitation events and impacts on the ground such as floods, landslides, and frosts. On the other hand, the region is also affected by the occurrence of heat waves and droughts and its related impacts. Moreover, Central and South America are among the regions with highest vulnerability to climate variability and change and land use change, with largely populated areas and biodiversity hotspots that are host to fragile human communities and ecosystems. During recent years, the scientific community has achieved important advances in understanding high impact weather events in the region. This session focuses on these advances and on the main scientific challenges to improve the understanding, simulation and forecasting of high impact weather events in the Andes and surrounding regions such as the Amazon, La Plata basin, Central America and the Caribbean. We welcome submissions focusing on high-impact events using observational, paleoclimate and modeling approaches. Studies based on the analysis of future projections under climate change and land use change scenarios are also welcome.
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