Urban heat impacts and friction in a tropical cyclone

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Fountain: Geophysics Research Magazine: atmospheres

The impact of tropical cyclones on coastal cities is especially significant due to high population density in these urban areas and the potential for infrastructure and loss of lives. Hu et al. [2024] Use high resolution computer simulations to model the victor of Tropical Cyclone of Slow Movement, which originated in the Southern China Sea and touched land in 1997 on the Hong Kong region densely populated.

The authors investigate two physical mechanisms to evaluate the influence of the city in the previous intensity and after the fall: the three -dimensional structure of urban areas and the impact on the flow of air on cities, known as friction, as well as emissions Heat of human activities. Their findings reveal that both mechanisms, heat and friction contributed to a reduction in the previous and subsequent intensity of the fall of Victor. However, precipitation -related findings are more complex. The authors found that the friction of the urban surface increases the rain near the center of the cyclone, while the heat of human activities increases rain in external bands.

This work highlights the critical importance of investigating the aspects of intensification and precipitation of tropical cyclones. The authors provide a solid base for future studies to improve the understanding of complex interactions between tropical cyclones and other coastal urban environments worldwide.

APPOINTMENT: HU, C., TAM, C.- Y., LI, Z., Chen, J., Chow, TN, LI, Y., et al. (2024). Impacts of urban heat and the roughness of the surface in the intensity of tropical dirt cyclones: a case study based on TC Victor (1997) in southern coastal China. Geophysics Research Magazine: atmospheres129, E2024JD040915. https://doi.org/10.1029/2024JD040915

—Matei Georgescu, associated editor, JGR: atmospheres

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