Thermal Environment Analysis of Kunming's Micro-Scale Area Based on Mobile Observation Data

This study compares mobile observation data from the same study area in Kunming on January 15, 2020, and January 8, 2023, to investigate the changes in micro-scale urban thermal environment characteristics under different weather conditions. Specifically, under overall declining temper-atures, commercial and industrial areas experience a more dramatic cooling effect. These regions, typically characterized by dense construction, limited green spaces, and abundant anthropogenic heat sources, show a more sensitive temperature response and larger cooling amplitude when ambient temperatures drop. In contrast, parks, wetlands, and other well-greened areas are less affected due to the moderating effects of vegetation and water bodies, resulting in relatively stable temperature differences. These variations lead to increased local temperature disparities, further exacerbating the unevenness of the urban thermal environment. Consequently, commercial and industrial zones are more vulnerable to thermal changes under extreme weather conditions, highlighting the fragility of urban resilience in the face of climate change.