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- Title
The Relationship between the Seasonal Dynamics of Surface Temperature and NDVI in Urbanized Areas of an Arid Zone. The Case of the Volgograd Agglomeration.
- Authors
Shinkarenko, S. S.; Kosheleva, O. Yu.; Gordienko, O. A.; Dubacheva, A. A.; Omarov, R. S.
- Abstract
Land surface temperatures and normalized difference vegetation index (NDVI) values were determined throughout the Volgograd agglomeration using data of MODIS products. Landscape zoning of the agglomeration was performed on the basis of Sentinel-2 images: five land categories differing in the ratio between sealed surfaces, green spaces, and reservoirs (including those within the boundaries of administrative and territorial units) have been distinguished. A map showing the spatial distribution of landscape zones within the Volgograd agglomeration was produced, and areas occupied by each land category were determined. Correlation coefficients have been computed for relationships between daytime, nighttime, and daily mean temperatures, on the one hand, and NDVI values, on the other hand, and their seasonal variations were identified. Specific features of relationships between the NDVI and surface temperature were established for various land categories and individual municipalities. Analysis shows that the weakest relationships between the surface temperature and NDVI are observed in municipalities with the predomination of nonirrigated arable lands and wastelands, while the strongest relationships are found in the greenest areas. It is established that, in areas with a predominance of buildings, the urban-heat-island effect is manifested at nighttime regardless of the state of vegetation cover. In areas with a predominance of green spaces, the relationship between the NDVI and surface temperature is virtually not expressed, with a cooling effect of vegetation being registered only in summer.
- Subjects
VOLGOGRAD (Russia); METROPOLITAN areas; SURFACE temperature; ARID regions; SURFACE dynamics; NORMALIZED difference vegetation index; GEOGRAPHIC boundaries
- Publication
Izvestiya, Atmospheric & Oceanic Physics, 2021, Vol 57, Issue 12, p1576
- ISSN
0001-4338
- Publication type
Article
- DOI
10.1134/S0001433821120197