City landscape changes effects on land surface temperature in Bucharest metropolitan area

Dan M. Savastru; Maria A. Zoran; Roxana S. Savastru; Adrian I. Dida

doi:10.1117/12.2278018

4 October 2017 City landscape changes effects on land surface temperature in Bucharest metropolitan area

Dan M. Savastru, Maria A. Zoran, Roxana S. Savastru, Adrian I. Dida

Proceedings Volume 10431, Remote Sensing Technologies and Applications in Urban Environments II; 104310V (2017) https://doi.org/10.1117/12.2278018
Event: SPIE Remote Sensing, 2017, Warsaw, Poland

Abstract

This study investigated the influences of city land cover changes and extreme climate events on land surface temperature in relationship with several biophysical variables in Bucharest metropolitan area of Romania through satellite and in-situ monitoring data. Remote sensing data from IKONOS, Landsat TM/ETM+ and time series MODIS Terra/Aqua and NOAA AVHRR sensors have been used to assess urban land cover– temperature interactions over 2000 - 2016 period. Time series Thermal InfraRed (TIR) satellite remote sensing data in synergy with meteorological data (air temperatureAT, precipitations, wind, solar radiation, etc.) were applied mainly for analyzing land surface temperature (LST) pattern and its relationship with surface landscape characteristics, assessing urban heat island (UHI), and relating urban land cover temperatures (LST). The land surface temperature, a key parameter for urban thermal characteristics analysis, was also analyzed in relation with the Normalized Difference Vegetation Index (NDVI) at city level. Results show that in the metropolitan area ratio of impervious surface in Bucharest increased significantly during investigated period, the intensity of urban heat island and heat wave events being most significant. The correlation analyses revealed that, at the pixel-scale, LST and AT possessed a strong positive correlation with percent impervious surfaces and negative correlation with vegetation abundances at metropolitan scale respectively. The NDVI was significantly correlated with precipitation. The spatial average air temperatures in urban test areas rise with the expansion of the urban size.

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Dan M. Savastru, Maria A. Zoran, Roxana S. Savastru, and Adrian I. Dida "City landscape changes effects on land surface temperature in Bucharest metropolitan area", Proc. SPIE 10431, Remote Sensing Technologies and Applications in Urban Environments II, 104310V (4 October 2017); https://doi.org/10.1117/12.2278018

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KEYWORDS

Climatology

Climate change

Temperature metrology

Ecosystems

Satellites

Vegetation

Wind energy

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