Observational Constraints on the Spatial Effect of Greenness and Canopy Cover on Urban Heat in a Major Midlatitude City

Lee, Jangho; Berkelhammer, Max

doi:10.1029/2024GL110847

Title: Observational Constraints on the Spatial Effect of Greenness and Canopy Cover on Urban Heat in a Major Midlatitude City

Journal Article · 07 November 2024 · Geophysical Research Letters

DOI: https://doi.org/10.1029/2024GL110847 · OSTI ID:2476727

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Earth and Environmental Sciences University of Illinois Chicago Chicago IL USA

Abstract Urban heat stress is a critical issue, particularly in cities where dense infrastructure and limited green space exacerbate temperature extremes. This study investigates the impact of greenery (EVI2), canopy cover (CC), impervious cover (IC), and water bodies on heat index in Chicago using high‐resolution data from the Heat Watch campaign. We find that EVI2, CC and proximity to water body significantly reduce heat while IC increases heat, particularly in the afternoon when solar radiation is intense. Additionally, the effective radius that land cover impacts heat is smaller in the afternoon. The combined effect analysis indicates that enhancing total greenness, not just canopy cover, is the most effective strategy to reduce heat. This study underscores the importance of strategic vegetation management, highlighting the critical role of integrated approaches in reducing urban heat.

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Sponsoring Organization:: USDOE

Grant/Contract Number:: SC0023226

OSTI ID:: 2476727

Journal Information:: Geophysical Research Letters, Journal Name: Geophysical Research Letters Journal Issue: 21 Vol. 51; ISSN 0094-8276

Publisher:: American Geophysical Union (AGU)Copyright Statement

Country of Publication:: United States

Language:: English

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