Spatio-temporal analysis of urban heat island in Shanghai over the past 30 years with Landsat images

Yifan Luo

doi:10.1117/12.2682660

1 June 2023 Spatio-temporal analysis of urban heat island in Shanghai over the past 30 years with Landsat images

Yifan Luo

Proceedings Volume 12710, International Conference on Remote Sensing, Surveying, and Mapping (RSSM 2023); 127100X (2023) https://doi.org/10.1117/12.2682660
Event: International Conference on Remote Sensing, Surveying, and Mapping (RSSM 2023), 2023, Changsha, China

Abstract

The influence of urban heat island (UHI) on the environment, human health, and urban livability has been and will continue to be a source of concern for humanity. We examined the spatial distribution and intensity of UHI in a metropolitan city Shanghai utilizing long time series of satellite images and land use data. Then we properly and objectively monitored the UHI phenomenon and evaluated its driving variables. Using Landsat 5, 7, and 8 satellite data with China's Land-Use/Cover Datasets (CLCD), we retrieved land surface temperature (LST) and computed the Urban Heat Island Intensity Index (UHII) to measure UHI intensity. When investigating the correlation between impervious surface area and UHI area, we also made use of the Pearson correlation coefficient. The study found that the LST in Shanghai fluctuated upwards from 1990 to 2020, with the downtown, suburbs, and outer suburbs increasing by 5.394 degrees, 9.187 degrees, and 5.211 degrees, respectively, with the high-temperature zone expanding to the city's periphery year by year. Meanwhile, the UHII varies dramatically, the average increase of UHI in suburbs is 4.522 degrees, while the average growth of UHI in downtown and outer suburbs is only 0.728 degrees and 0.546 degrees, respectively. The Pearson correlation coefficient between UHI area and impervious surface area is 0.8698331. Shanghai's UHI has been rising year after year, owing to an increase in impervious surface area as a result of urbanization. The causes of the large changes in surface temperature and UHI have yet to be discovered and studied in depth. Overall, these findings show that urbanization has an impact on the establishment and intensity of UHI diffusion. To balance urban development with the urban thermal environment, more measures should be explored.

Citation Download Citation

Yifan Luo "Spatio-temporal analysis of urban heat island in Shanghai over the past 30 years with Landsat images", Proc. SPIE 12710, International Conference on Remote Sensing, Surveying, and Mapping (RSSM 2023), 127100X (1 June 2023); https://doi.org/10.1117/12.2682660

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
7 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Landsat

Thermal effects

Correlation coefficients

Earth observing sensors

Climatology

Satellites

Climate change

Show All Keywords

Keywords/Phrases

Search In:

Publication Years