The Influence of Aerosols on Forest Vegetation Cover in the South-West of Azerbaijan
Journal Title: Lesnoy Zhurnal (Russian Forestry Journal) - Year 2024, Vol 3, Issue 3
Abstract
Atmospheric pollution by anthropogenic emissions leads to an increase in the content of aerosols in the air. This causes distortions in the Earth remote sensing data in the visible ranges. Thus, the use of vegetation indices, in particular, the normalized differential vegetation index (NDVI), is difficult. In this regard, interest in the use of satellite images obtained in the short-wave infrared bands SWIR1 and SWIR2 has recently increased. Unlike NDVI, when calculating the AFRI-1600 and AFRI-2100 indices, the values of these bands are taken into account (instead of visible red). Therefore, these indices are called aerosol-free. The article addresses the issues of the NDVI and AFRI indices. The studies have been carried out in three regions located in the south-west of Azerbaijan. The initial data has been taken from 2000 and 2021 images obtained using the Landsat-5 and Landsat-8 satellites, respectively. The scanners of these satellites have ranges of 1600 and 2100 μm. The study has taken place in several stages. At the first stage, the AFRI-1600 indices have been calculated and the areas with high aerosol content for the indicated years have been identified. By studying the dynamics of the amount of aerosols, two types of sites have been identified. Type 1 sites are those where the aerosol content was high in 2000, but dropped in 2021. In type 2 sites, a high value of this indicator was not previously recorded, but was noted in 2021. The NDVI index value has been obtained for both categories, and the classification of the site coverage has been carried out. The results of superimposing index maps on each other have shown that an increase in aerosol content corresponds to a decrease in vegetation density, and vice versa, a decrease in aerosols corresponds to an increase in this indicator. Thus, the increased aerosol content has a negative effect on the condition of forest cover. This is confirmed by the VCI (vegetation condition index) maps.
Authors and Affiliations
Valida M. Mamedaliyeva, Gunel S. Heydarzade
Application of Urea-Formaldehyde Oligomer for Quality Improvment of Paper and Cardboard Products
The applicability of the developed binary system of synthetic compounds in coating paste, consisting of urea-formaldehyde oligomer (2 pts. wt. to the coating paste weight) and latex (16 pts. wt.), is found. It replaces t...
Features of the Horizontal Structure of Forests of Spruce Formations in the European Taiga of Russia
The article highlights the issues of studying the structure of indigenous forests of different ages as a model of sustainable forest formations. The research purpose is to study the patterns of horizontal structure forma...
Power Characteristics of Mulcher Joints When Removing Tree and Shrub Vegetation
In recent years, the enterprises of forestry and the Ministry of Energy of the Republic of Belarus and other countries widely implemented advanced milling tools designed to chop wood, stumps and roots without immersing t...
The Content of Heavy Metals in Soils and Leaves of Silver Birch Plantations (Moscow)
The ecological condition of urban plantations is an urgent problem of our time. The condition of plantations and soils characterizes the ecological and sanitary condition of the environment. In the structure of the citie...
Formation of Sectoral Residual Thermoplastic Tension Fields in Circular Saw Blade
The efficiency of a stationary circular saw is determined by the performance and operational reliability of the woodcutting unit. During operation, the circular saw blade is exposed to a variety of complex loads and ther...