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The estimation of the influence of land cover types on the distribution of land surface temperature and air temperature in Poznań based on Landsat satellite data and measurement data

Agnieszka Majkowska

Abstract

The main aim of this thesis is to assess the thermal conditions of the city of Poznań in terms of spatial variability of land surface temperature and statistically estimated air temperature in various types of land cover. The scope of this paper covers data collected in years 2009-2016. A set of in-situ measurement data from a network of 10 stations located in different areas of the city was enhanced with satellite data from the Landsat 5 and Landsat 8 satellites. The paper makes use of all available 28 scenes for the research period that meet the accepted quality criteria including cloud-free data. To study the spatial differentiation of the temperature variability, CORINE Land Cover 2012 was used as the classification of land cover types. The raw satellite data was re-calculated to the land surface temperature. The selection of point values from converted scenes and the use of measurement data led to the creation of statistical models allowing to air temperature’s estimation at the height of 2 meters above the active layer in various types of land cover for radiation weather type. In total, 6 linear regression models were created by means of the cross-validation techniques with the coefficients of determination r2 in the range from 0.81 to 0.90. Statistical models were created for the following types of land cover: continuous urban fabric, discontinuous urban fabric, airports, sports and leisure facilities, broad-leaved forests. In addition, one common statistical model was created using all available data which did not distinguish the particular type of land cover. The average area of the surface urban heat island in Poznań covers 31.2 km2, which is about 12% of the city area. The results of the research clearly indicate that the estimated air temperature for continuous urban fabric is about 0.9oC higher in comparison with the average value for the whole city. The highest value of the estimated air temperature occurs within industrial and commercial areas and is 1.6oC higher than the average. These are the warmest parts of Poznań. Respectively, the coldest areas are water bodies – especially lakes, natural grasslands and forest complexes.
Record ID
UAM6ee61f2e8ce448069aa1c09daa50a033
Diploma type
Doctor of Philosophy
Author
Agnieszka Majkowska Agnieszka Majkowska ,, Undefined Affiliation
Title in Polish
Estymacja wpływu pokrycia terenu na rozkład temperatury powierzchni czynnej i powietrza w Poznaniu na podstawie danych satelitarnych Landsat oraz danych pomiarowych
Title in English
The estimation of the influence of land cover types on the distribution of land surface temperature and air temperature in Poznań based on Landsat satellite data and measurement data
Language
pol (pl) Polish
Certifying Unit
Faculty of Geographical and Geological Sciences (FoGaGS)
Discipline
geography / (Earth sciences domain) / (biological sciences)
Scientific discipline (2.0)
6.7 Earth and related environmental sciences
Status
Finished
Year of creation
2018
Defense Date
23-10-2018
Title date
23-10-2018
Supervisor
External reviewers
Mariusz Szymanowski Mariusz Szymanowski,, Undefined Affiliation
Krzysztof Fortuniak Krzysztof Fortuniak,, Undefined Affiliation
Pages
102
URL
http://hdl.handle.net/10593/24046 Opening in a new tab
Keywords in English
surface urban heat island Landsat, land surface temperature, land cover types
Abstract in English
The main aim of this thesis is to assess the thermal conditions of the city of Poznań in terms of spatial variability of land surface temperature and statistically estimated air temperature in various types of land cover. The scope of this paper covers data collected in years 2009-2016. A set of in-situ measurement data from a network of 10 stations located in different areas of the city was enhanced with satellite data from the Landsat 5 and Landsat 8 satellites. The paper makes use of all available 28 scenes for the research period that meet the accepted quality criteria including cloud-free data. To study the spatial differentiation of the temperature variability, CORINE Land Cover 2012 was used as the classification of land cover types. The raw satellite data was re-calculated to the land surface temperature. The selection of point values from converted scenes and the use of measurement data led to the creation of statistical models allowing to air temperature’s estimation at the height of 2 meters above the active layer in various types of land cover for radiation weather type. In total, 6 linear regression models were created by means of the cross-validation techniques with the coefficients of determination r2 in the range from 0.81 to 0.90. Statistical models were created for the following types of land cover: continuous urban fabric, discontinuous urban fabric, airports, sports and leisure facilities, broad-leaved forests. In addition, one common statistical model was created using all available data which did not distinguish the particular type of land cover. The average area of the surface urban heat island in Poznań covers 31.2 km2, which is about 12% of the city area. The results of the research clearly indicate that the estimated air temperature for continuous urban fabric is about 0.9oC higher in comparison with the average value for the whole city. The highest value of the estimated air temperature occurs within industrial and commercial areas and is 1.6oC higher than the average. These are the warmest parts of Poznań. Respectively, the coldest areas are water bodies – especially lakes, natural grasslands and forest complexes.

Uniform Resource Identifier
https://researchportal.amu.edu.pl/info/phd/UAM6ee61f2e8ce448069aa1c09daa50a033/
URN
urn:amu-prod:UAM6ee61f2e8ce448069aa1c09daa50a033

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