Satellite monitoring of the state of the local level geosystem on the example of Matviyivsky forest near Mykolayiv (Ukraine)

• Дата: 2023
• Автор: Lischenko, Lyidmila
• Формат: Стаття
• Мова: Ukrainian
• Опубліковано: Scientific Centre for Aerospace Research of the Earth Institute of Geological Science National Academy of Sciences of Ukraine, Kyiv, Ukraine 2023
• Теми: monitoring; long-term satellite data series; Sentinel-2; Landsat; geosystem; land surface temperature; vegetation index
• Онлайн доступ: https://ujrs.org.ua/ujrs/article/view/228
• Назва журналу: Ukrainian Journal of Remote Sensing of the Earth

The research aims are to demonstrate the application of long-term satellite data series for the study and analysis of a separate self-organized local-level geosystem for identifying trends of changes for regional-level ecosystems. There is area that under the influence of natural and anthropogenic factors has undergone rapid changes. As an example, it is a small southern steppe area of artificially planted "Matviyivsky Forest" near Mykolayiv, Ukraine, located on the left bank of the Southern Bug. The analysis uses a long-term series of multi-zone data from the Landsat mission (the period is 32 years) and Sentinel-2 in recent years, which establish the relationships between the state of the geosystem, surface temperature (LST), and vegetation. It was found that the values of the vegetation index NDVI and LST are in antiphase. The correlations between them are only 0.56, because at the local level there are other factors, such as soil moisture, landform, weather conditions at the time of the survey. Using Sentinel-2, the next changes of land cover have been traced and mapped – the result of disturbance of the sand sediment, the square of fire forest, reduction of plantations, planting of new trees. This geosystem is unstable and it is highly variable, it has undergone constant transformations in time and spatial, but it suitable retains its natural self-regulation recreational and restorative functions. Multidimensional information is the best displayed and analysed using transect profiles, which variously characterize the geography system "Matviyivsky Forest", namely the geological environment, vegetation, thermal characteristics of the surface, temporal and spatial variability of the land cover, and other biophysical parameters obtained from satellite data. The methodical approach with the use of local geosystem profiling with the integration of different characteristics space data can be successfully applied in the environmental management of a particular site in any natural conditions and show its vulnerability to anthropogenic pressures.