Spatiotemporal Evaluation of Land Cover Impacts on Urban Climate

Authors: Zhe Wang*, University of Idaho, Chao Fan, Assistant Professor
Topics: Urban Geography, Climatology and Meteorology, Geographic Information Science and Systems
Keywords: SUHI(Surface Urban Heat Island), land cover dynamics, Boise
Session Type: Guided Poster
Day: 4/4/2019
Start / End Time: 3:05 PM / 4:45 PM
Room: Roosevelt 3.5, Marriott, Exhibition Level
Presentation File: No File Uploaded

In this study, we coupled remotely sensed data sets, local spatial indicators, and spatial econometric models to examine the spatiotemporal trend in the surface temperatures in relation to the urbanization patterns over the Boise-Meridian region from 1995 to 2015. The rapidly growing Boise metropolitan area has experienced dramatic warming over the past 20 years and by far no known study has examined this warming trend. Landsat TM and OLI imagery were acquired from the USGS GloVis web interface. Cloud-free summer images for the year 1995, 2005, and 2015 were collected. We created an array of grids over the surface temperature maps and generate the LST profiles along the urban-rural gradient of the study area. The abundance and spatial arrangements of land cover features were quantified using the spatial autocorrelation approach. We approached land cover maps from a gradient landscape modeling perspective and utilized the two spatial autocorrelation indices—Getis-Ord G and local Moran’s I—to quantitatively determine the land composition and spatial configuration of vegetation and built-up features. Correlation and multiple regression analysis were performed to evaluate the urbanization impacts on the summer surface UHI. This study will provide the first investigation of the evolving UHI pattern and associate it with the land cover dynamics in this fast-growing metropolitan region. Results from this research will provide targeted guidelines for sustainable future planning and resource management.

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