Analysis of land surface temperature and NDVI distribution for Budapest using Landsat ETM+ data
Urban areas considerably vary in land coverage, emission of pollutants and anthropogenic heat release from the natural surroundings. As a result, an alteration of meteorological variables (e.g. temperature, wind, moisture) is detected in the cities, which can fundamentally be observed with three met...
Elmentve itt :
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| Dokumentumtípus: | Cikk |
| Megjelent: |
2016
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| Sorozat: | Acta climatologica
49-50 |
| Kulcsszavak: | Földfelszín - hőmérséklet - analízis |
| Tárgyszavak: | |
| Online Access: | http://acta.bibl.u-szeged.hu/44527 |
| Tartalmi kivonat: | Urban areas considerably vary in land coverage, emission of pollutants and anthropogenic heat release from the natural surroundings. As a result, an alteration of meteorological variables (e.g. temperature, wind, moisture) is detected in the cities, which can fundamentally be observed with three methods: in-situ measurements, numerical mesoscale meteorological models and remote sensing products. In this work, a satellite imagery (singlechannel algorithm) technique was utilized to investigate the spatial distribution of land surface temperature (LST) and normalized vegetation index (NDVI) for the capital city of Hungary. The high-resolution thermal infrared band (60 m) of Landsat 7 ETM+ (Enhanced Thematic Mapper Plus) provides a powerful tool to categorize different land cover zones and to determine the thermal properties of land surface. Two dates (2 and 18 August 2014) and 11 Local Climate Zones (LCZs) were selected to take into consideration the progress of vegetation and the dissimilarity of land coverage in LST modification. The results suggest that the presence of vegetation leads to a significant LST reduction. For instance, the thermal contrast between the LCZs of compact midrise (NDVI: 0.15) and dense trees (NDVI: 0.73) passed 40 °C on 02 August, 2014. On average, the LST approached 40 °C in case of three LCZs (compact midrise, compact low-rise, open midrise) and for 9% of the total study area. |
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| Terjedelem/Fizikai jellemzők: | 49-61 |
| ISSN: | 0563-0614, 0324-6523 |