CURRENT HYDROCLIMATIC CHANGES IN THE BAIKAL REGION

Section
Monitoring, experimental and expeditionary research
  • Natalia V. Kichigina V.B. Sochava Institute of geography of Siberian Branch of the Russian Academy of Science, Irkutsk, Russia https://orcid.org/0000-0003-2350-6795
  • Nadezhda N. Voropay V.B. Sochava Institute of geography of Siberian Branch of the Russian Academy of Science, Irkutsk, Russia; Institute of Monitoring of Climatic and Ecological Systems SB RAS, Tomsk, Russia https://orcid.org/0000-0003-4179-4225
Keywords: climate change, ends in river runoff series, precipitation, maximum runoff, floods, Baikal region
(+) Abstract

Changes in daily and monthly values of atmospheric precipitation and river runoff characteristics (mean monthly, annual, maximum and minimum discharges) on rivers in the basins of the Lena, Angara and Lake Baikal for the period 1966–2019 are considered in the paper. The dependence of fluctuations in atmospheric precipitation on the characteristics of atmospheric circulation is obtained. The calculation of precipitation trends in the territory under consideration was performed. Trends are determined in the series of monthly and annual precipitation and river runoff series. The assessment of long-term runoff fluctuations was carried out using difference integral runoff curves.

It is showed that in most cases precipitation trends are not statistically significant. Correlation coefficients between hydroclimatic characteristics reach 64%, while their highest values were obtained in the analysis of daily water levels and pentad sums of atmospheric precipitation. The change in circulation epochs within the study period is one of the main factors of changes in the atmospheric precipitation regime and river runoff characteristics.

Changes in river runoff characteristics, for the period under review (1966–2019) were not intended to increase the risk of floods. Positive trends in river runoff characteristics are noted mainly for average monthly values during the cold season and for minima summer and winter runoff. The vast majority of statistically significant trends in annual and average monthly runoff for the warm period, as well as all trends in maximum runoff, are negative. This is due to the period of low water content observed here.

(+) About the author(s)

Natalia V. Kichigina,
V.B. Sochava Institute of geography of Siberian Branch of the Russian Academy of Science, Irkutsk, Russia

eLibrary (РИНЦ)
SPIN-
код

ORCID ID

Scopus ID

Прочие

9872-8977

0000-0003-2350-6795

14011980600

AAQ-2557-2020

Nadezhda N. Voropay,
V.B. Sochava Institute of geography of Siberian Branch of the Russian Academy of Science, Irkutsk, Russia; Institute of Monitoring of Climatic and Ecological Systems SB RAS, Tomsk, Russia

eLibrary (РИНЦ)
SPIN-
код

ORCID ID

Scopus ID

Прочие

7305-0223

0000-0003-4179-4225

54796360800

A-6673-2014

 

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Published
2022-02-10
How to Cite
Natalia V. Kichigina, & Nadezhda N. Voropay. (2022). CURRENT HYDROCLIMATIC CHANGES IN THE BAIKAL REGION. Hydrosphere. Hazard Processes and Phenomena, 3(4), 373–390. https://doi.org/10.34753/HS.2021.3.4.373

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