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Urban Renewal Can Mitigate Urban Heat Islands
Author(s) -
Wang Wei,
Shu Jiong
Publication year - 2020
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2019gl085948
Subject(s) - urban heat island , urbanization , environmental science , vegetation (pathology) , urban climate , vegetation cover , scale (ratio) , urban planning , climate change , land cover , physical geography , climatology , land use , meteorology , geography , civil engineering , geology , medicine , oceanography , cartography , pathology , engineering , economics , economic growth
How can urban renewal effectively contribute to urban climate? Shanghai, one of the world's first metropolises to utilize effective urban heat island (UHI) mitigation strategies, is investigated by analyzing meteorological and land use observations over the past 144 years. The UHI decreased by ~0.58 °C between 2005 and 2016 due to urban renewal characterized by an increase in vegetation cover and the closure of the high‐energy consumption industries in urban areas. Simulation results also indicate that future mitigation strategies should strive to increase vegetation cover, as a 10–20% increase in vegetation cover is anticipated to reduce the UHI by 0.38–0.78 °C, resulting in potential electricity savings of 3.05–5.79 × 10 8 kWh/year, which correspond to a carbon emissions reduction of 2.47–4.68 × 10 5 tCO 2 /year. The results will contribute to improve urban climate associated with large‐scale urbanization and will provide guidance for urban renewal in other metropolises worldwide.