Geospatial and in-situ information for assessment of urban climate

Maria A. Zoran; Roxana S. Savastru; Dan M. Savastru; Marina N. Tautan; Laurentiu A. Baschir

doi:10.1117/12.2532253

27 June 2019 Geospatial and in-situ information for assessment of urban climate

Maria A. Zoran, Roxana S. Savastru, Dan M. Savastru, Marina N. Tautan, Laurentiu A. Baschir

Author Affiliations +

Proceedings Volume 11174, Seventh International Conference on Remote Sensing and Geoinformation of the Environment (RSCy2019); 111740N (2019) https://doi.org/10.1117/12.2532253
Event: Seventh International Conference on Remote Sensing and Geoinformation of the Environment (RSCy2019), 2019, Paphos, Cyprus

Abstract

This paper investigated urban growth and green land cover decrease impacts on Bucharest metropolitan climate. Time series of Landsat TM/ETM/OLI, MODIS Terra/Aqua and NOAA AVHRR thermal infrared data as well as in-situ meteorological data have been used to assess urban land cover– air and land surface temperature interactions over 2000- 2018 period. The air (Ta) and land surface temperature (Ts), key parameters for urban climate study were analyzed in relation with the Normalized Difference Vegetation Index (NDVI) and surface latent heat flux (SLHF) at city level. Based on these parameters, the urban growth, Urban Heat Island (UHI) effect and the relationships of Ts to other biogeophysical parameters have been investigated. Correlation analysis revealed that, at the pixel-scale, Ta and Ts possessed a strong positive correlation with percent impervious surfaces and negative correlation with vegetation abundances at the regional scale, respectively. Was also analyzed UHI phenomenon during extreme heat waves events. Our results suggest that the most intense UHI occurs in day-time in the summer period during heat waves periods. Satellite data in synergy with insitu data revealed a clear land surface temperature contrast between the central, median and peripheral zones of Bucharest metropolitan zone in Romania. The analysis shows that different urban/periurban zones and landscapes bring diurnally and seasonally different contributions to the local and regional thermal environment. Urban land cover was the most important contributor to increases in regional Ts. Vegetation had a clear cooling effect as the normalized vegetation difference index (NDVI) increased during summer periods.

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Maria A. Zoran, Roxana S. Savastru, Dan M. Savastru, Marina N. Tautan, and Laurentiu A. Baschir "Geospatial and in-situ information for assessment of urban climate", Proc. SPIE 11174, Seventh International Conference on Remote Sensing and Geoinformation of the Environment (RSCy2019), 111740N (27 June 2019); https://doi.org/10.1117/12.2532253

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KEYWORDS

Climatology

Climate change

Vegetation

MODIS

Satellites

Temperature metrology

Environmental sensing

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