Long-term changes in the hydroclimatic characteristics in the Baikal region

3rd International Conference Environment and Sustainable Development of Territories: Ecological Challenges of the 21st Century

生态环境科学;地球科学;经济学

Voropay, N.N.^1,2 ; Kichigina, N.V.^1

V B Sochava Institute of Geography, Siberian Branch, Russian Academy of Science, Ulan-Bator str., 1, Irkutsk

664033, Russia^1

Institute of Monitoring of Climatic and Ecological Systems, SB RAS, Academic av., 10/3, Tomsk

634021, Russia^2

关键词: 19th century;    Air temperature;    High water;    Hydroclimatic;    Hydrological regime;    Long term change;    Regional feature;    River flow;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/107/1/012042/pdf
DOI  :  10.1088/1755-1315/107/1/012042

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Since the end of the 19th century, global air temperature has been increasing. The period after 1976 is called the period of the most intensive warming. In Russia, the average annual air temperature rises at a rate of + 0.43 ° C / 10 years. The change of precipitation over the last 50-60 years on average in Russia is not significant. In the Baikal region, precipitation increase during the warm period (10-11%) and decrease during the cold period (4%). It is reflected on hydrological regime and the factors of river flow formation. The regional features of the hydrological regime dynamics of the Baikal region against the background of climate change are considered. Groups of the rivers with similar alternations of low water and high-water periods are allocated. Trends in runoff are analyzed. The increase in air temperature leads to intra annual redistribution of river flow. The majority of statistically significant trends of river run off are observed during the cold period of year.