Urbanization and urban heat islands in the Jing-Jin-Ji (JJJ) area of China

Authors: Yuyu Zhou*, Iowa State University, Xue Liu, Iowa State University, Xuecao Li, Iowa State University, Huidong Li, Iowa State University, Yiming Wang, Iowa State University
Topics: Land Use and Land Cover Change, China, Urban Geography
Keywords: Urbanization, Urban Heat Island, Food-Energy-Water Nexus
Session Type: Paper
Day: 4/6/2019
Start / End Time: 9:55 AM / 11:35 AM
Room: Senate Room, Omni, West
Presentation File: No File Uploaded

Our planet is experiencing a rapid urbanization over past decades, which brings challenges of increasing demands for food, energy, and water. This study aims to improve the understanding of urbanization impact on water, energy, and food in the Jing-Jin-Ji (JJJ) region in China for sustainable development goals (SDGs). We built annual urban extent maps in the JJJ region using fine resolution Landsat data and nighttime light data, based on which we modeled future urban expansion in the JJJ region under different scenarios. We also quantified the urban heat island (UHI) along the urban-rural gradient using the gap-filled land surface temperature (LST) data and station-derived air temperature data. A remarkable urban sprawl in the JJJ region, especially after 2000 was observed. Meanwhile, there is a distinct effect of UHI along the urban-rural gradient. The datasets and algorithms are of great use to examine the urban environment, which can further help us to investigate the urbanization impact on water, energy, and food in the context of climate change.

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