Drought Frequency in Belarus in Connection with Atmospheric Circulation in the Euro-Atlantic Sector

IF 1.4 4区 地球科学 Q4 METEOROLOGY & ATMOSPHERIC SCIENCES Russian Meteorology and Hydrology Pub Date : 2023-12-28 DOI:10.3103/s1068373923090054
I. S. Danilovich, Yu. A. Gledko, I. V. Tarasevich
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Abstract

In the paper, the frequency and spatial distribution of atmospheric and hydrological droughts over the territory of Belarus in 1945–2020 is assessed. Aridity is evaluated using the standardized precipitation and streamflow indices (SPI and SSFI). Trends in monthly total precipitation are determined, the features of the streamflow formation during the open-channel period are revealed. The frequency of anticyclones that determines hydrometeorological conditions on the territory of Belarus is calculated. The statistically significant increase in the number of the days with anticyclonic weather over the country during the warm season is found. The increasing frequency of dry conditions in summer months against the background of a rise in the precipitation intensity is highlighted. A simultaneous increase in the frequency of very-low-flow periods on rivers and an increase in the height of warm rainfall floods in some river basins are revealed.

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白俄罗斯的干旱频率与欧洲-大西洋扇区大气环流的关系
摘要 本文评估了 1945-2020 年白俄罗斯境内大气干旱和水文干旱的频率和空间分布。使用标准化降水量和溪流指数(SPI 和 SSFI)对干旱进行评估。确定了月总降水量的变化趋势,揭示了开放通道时期的水流形成特点。对决定白俄罗斯境内水文气象条件的反气旋频率进行了计算。据统计,温暖季节全国出现反气旋天气的天数明显增加。在降水强度增加的背景下,夏季干燥的频率也在增加。在某些河流流域,河流出现极低流量期的频率增加,暖降雨洪水的高度增加。
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来源期刊
Russian Meteorology and Hydrology
Russian Meteorology and Hydrology METEOROLOGY & ATMOSPHERIC SCIENCES-
CiteScore
1.70
自引率
28.60%
发文量
44
审稿时长
4-8 weeks
期刊介绍: Russian Meteorology and Hydrology is a peer reviewed journal that covers topical issues of hydrometeorological science and practice: methods of forecasting weather and hydrological phenomena, climate monitoring issues, environmental pollution, space hydrometeorology, agrometeorology.
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