Prioritizing social vulnerability in urban heat mitigation

Author:

Fung Kwun Yip1ORCID,Yang Zong-Liang1ORCID,Martilli Alberto2ORCID,Krayenhoff E Scott3ORCID,Niyogi Dev14ORCID

Affiliation:

1. Department of Earth and Planetary Sciences, Jackson School of Geosciences, The University of Texas at Austin , Austin, TX 78712 , USA

2. Atmospheric Modelling Unit, Environmental Department, CIEMAT , 28040 Madrid , Spain

3. School of Environmental Sciences, University of Guelph , Guelph, ON N1G 2W1 , Canada

4. Maseeh Department of Civil, Architectural, and Environmental Engineering, Cockrell School of Engineering, The University of Texas at Austin , Austin, TX 78712 , USA

Abstract

Abstract We utilized city-scale simulations to quantitatively compare the diverse urban overheating mitigation strategies, specifically tied to social vulnerability and their cooling efficacies during heatwaves. We enhanced the Weather Research and Forecasting model to encompass the urban tree effect and calculate the Universal Thermal Climate Index for assessing thermal comfort. Taking Houston, Texas, and United States as an example, the study reveals that equitably mitigating urban overheat is achievable by considering the city's demographic composition and physical structure. The study results show that while urban trees may yield less cooling impact (0.27 K of Universal Thermal Climate Index in daytime) relative to cool roofs (0.30 K), the urban trees strategy can emerge as an effective approach for enhancing community resilience in heat stress-related outcomes. Social vulnerability-based heat mitigation was reviewed as vulnerability-weighted daily cumulative heat stress change. The results underscore: (i) importance of considering the community resilience when evaluating heat mitigation impact and (ii) the need to assess planting spaces for urban trees, rooftop areas, and neighborhood vulnerability when designing community-oriented urban overheating mitigation strategies.

Funder

NASA Earth and Space Science and Technology Program

NIHHIS

U.S. Department of Energy Advanced Scientific Computing Research Program

CROCUS

NASA Interdisciplinary Sciences

U.S. National Science Foundation

NASA Earth Science Division Equity and Environmental Justice

Publisher

Oxford University Press (OUP)

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