Satellite Monitoring of Atmospheric Carbon Dioxide in Krasnoyarsk Krai

The present study analyzes the year-to-year (2003–2021) and seasonal variations in concentration of atmospheric CO2, Land Surface Temperature (LST), and Normalized Difference Vegetation Index (NDVI) in Krasnoyarsk Krai, based on satellite data. Over the study period, the annual average concentration of atmospheric CO2 had increased by 41 ppm. Analysis of seasonal variations in CO2 concentration demonstrated a carbon dioxide decrease in summer and an increase in winter. Positive trends were revealed in the annual average LST and the average NDVI values for a period between March and October in Krasnoyarsk Krai over 2001–2023. Analysis of the spatial distribution of CO2 in the atmosphere of Krasnoyarsk Krai in 2021 revealed higher CO2 concentrations (about 415 ppm) in the west of Krasnoyarsk Krai, as far as the Yenisei River. Lower CO2 concentrations (about 414 ppm) were found in the northern, island areas (ice-covered area and Arctic deserts) and in the regions of the Central Siberian Plateau and Sayan Mountains. Analysis of correlation of the LST and NDVI spatial distributions for 2021 revealed a positive relationship of NDVI to LST. In the northernmost, island part of Krasnoyarsk Krai, the negative LST value is correlated with the negative NDVI value. Farther south, a classical increase in LST and NDVI occurs. The coefficient of correlation between LST and NDVI over the entire area of Krasnoyarsk Krai is rather high: 0.83.