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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-23 18:10 |
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Conference: Bucharest University Faculty of Physics 2014 Meeting
Section: Atmosphere and Earth Science; Environment Protection
Title:
Analysis of climate change impacts on Urban Heat Island through time-series MODIS Terra/Aqua satellite data
Authors:
Maria ZORAN (1), Claudia Elena DUMITRU(1,2)
Affiliation:
(1)National Institute of R&D for Optoelectronics INOE 2000 Bucharest Magurele
(2)University of Bucharest, Faculty of Physics, P.O.BOX MG-11, Magurele, Romania
E-mail
maria@dnt.ro
Keywords:
climate change impacts, UHI, satellite remote sensing, MODIS Terra/Aqua, Bucharest, Romania
Abstract:
Through spatio-temporal changes of micro and macro-meteorological conditions in metropolitan areas, climate change due to increased anthropogenic emissions of greenhouse gases and carbon dioxide (CO2) represents a long-term climate hazard with high potential to alter the intensity, temporal pattern, and spatial extent of the urban heat island (UHI). Urban areas tend to experience a relatively higher temperature compared with the surrounding rural areas. This thermal difference, in conjunction with waste heat released from urban houses, transportation and industry as well as with extreme heat climate events, contribute to the development of urban heat island (UHI). Urbanization, the conversion of other types of land to uses associated with growth of populations and economy has a great impact on both micro-climate as well as macro-climate. Remote sensing derived biophysical attributes provide great potential for establishing parameters describing urban land cover/use (construction materials and the composition and structure of urban canopies) for improving the understanding of the urban surface energy budgets, and observing the urban heat island (UHI) effect. In this study have been used time series MODIS Terra/Aqua over Bucharest metropolitan area from 2002 to 2013 to retrieve the urban biogeophysical parameters and brightness temperatures in relation with changes of land cover/use types. The spatial distribution of heat islands has been changed from a mixed pattern, where bare land, semi-bare land and land under development were warmer than other surface types, to extensive UHI. Our analysis showed that higher temperature in the UHI was located with a scattered pattern, which was related to certain land-cover types. In order to analyze the relationship between UHI and land-cover changes, this study attempted to employ a quantitative approach in exploring the relationship between temperature and several indices, including the Normalized Difference Vegetation Index (NDVI), Land Surface Temperature (LST) and land surface albedo.
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