5:15 PM - 7:15 PM
[MIS05-P06] Peculiarities of air temperature distribution in landscapes of the Tunka depression (Republic of Buryatia, Russia) in XX-XXI centuries
Keywords:air temperature, mountain depression, monitoring, Baikal region
Recent years, the attention of the scientific community has turned to mountainous areas. Mountain landscapes are the most sensitive to external impacts of natural and anthropogenic nature.
The object of the study is the Tunka depression - the territory of the Tunka National Park - a system of intermountain depressions of tectonic origin in the mountains of the Eastern Sayan in Buryatia, bounded by the Hamar-Daban ridges from the south.
The peculiarities of air temperature distribution in the territory of the Tunka depression for the period 1934-2022 were assessed. Microclimatic monitoring has been carried out on the territory of the depression since 2009 and up to the present time. In our work we used observation series from 45 model sites and data from the meteorological station Tunka (Roshydromet).
We reconstructed omissions in the urgent air temperature data (2009-2022) and reconstructed mean daily temperatures at the model sites (1934-2008). The peculiarities of air temperature distribution are revealed. The general multiyear trend is positive - 0.2°C/10 years. The period with temperatures above 0°C becomes longer due to earlier dates of temperature transition through 0°C in spring time. There is an increase in the sum of positive temperatures both on the slopes and in the bottom of the depression.
This depression is considered as a model object, so it will be possible to extrapolate the results to other depressions of the Baikal type.
The research was carried under support of the Russian Science Foundation grant № 25-27-00395 (https://rscf.ru/en/project/25-27-00395/).
The object of the study is the Tunka depression - the territory of the Tunka National Park - a system of intermountain depressions of tectonic origin in the mountains of the Eastern Sayan in Buryatia, bounded by the Hamar-Daban ridges from the south.
The peculiarities of air temperature distribution in the territory of the Tunka depression for the period 1934-2022 were assessed. Microclimatic monitoring has been carried out on the territory of the depression since 2009 and up to the present time. In our work we used observation series from 45 model sites and data from the meteorological station Tunka (Roshydromet).
We reconstructed omissions in the urgent air temperature data (2009-2022) and reconstructed mean daily temperatures at the model sites (1934-2008). The peculiarities of air temperature distribution are revealed. The general multiyear trend is positive - 0.2°C/10 years. The period with temperatures above 0°C becomes longer due to earlier dates of temperature transition through 0°C in spring time. There is an increase in the sum of positive temperatures both on the slopes and in the bottom of the depression.
This depression is considered as a model object, so it will be possible to extrapolate the results to other depressions of the Baikal type.
The research was carried under support of the Russian Science Foundation grant № 25-27-00395 (https://rscf.ru/en/project/25-27-00395/).