Droughts and dynamics of synoptic processes in the south of the East European Plain at the beginning of the twenty-first century

Черенкова, Е. А.; Semenova, Inna; Kononova, Nina; Титкова, Т. Б.

doi:10.1134/s2079096115020055

Cited by 17 publications

(7 citation statements)

References 8 publications

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“…[59][60][61][62][63][64][65] Some of these blocking events and episodes have even become mass casualty events recently, especially for the nations of Eurasia in 2003 12 and again in 2010, 66 as well as being the underlying cause of ecological disasters, such as large forest fires or adverse agricultural impacts. [67][68][69][70] There are indicators that the recent heat and drought of northern Russia and Siberia have been associated with blocking, including the measurement of 38 °C (100 °F) in Verkhoyansk on June 20, 2020 (see the University of Missouri blocking archive 71 ). However, a wide range of other types of extreme weather events have been attributed to the blocking environment, such as cold waves, 46,47,63,[72][73][74][75] extreme precipitation and flooding, 76,77 summer season thunderstorm activity, 78 blizzards, 79,80 as well as having an impact on the weather for entire seasons.…”

Section: Observational Studies Of Blocking and Extreme Weathermentioning

confidence: 99%

Atmospheric blocking events: a review

Lupo

2020

Annals of the New York Academy of Sciences

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Even though meteorologists have been aware of atmospheric blocking for more than 100 years, it is a phenomenon still not well forecast or completely understood. Also, while there is not one standard accepted definition, there are some commonalities known about the understanding of blocking behavior. Blocking occurs less often than other destructive phenomena, but globally their occurrence has increased since the beginning of the century. The longevity of blocking means it can negatively impact agricultural and economic activity and human comfort by bringing extreme conditions not only to the areas where they occur but also to locations well upstream and downstream. Additionally, while it is known where blocking occurs and their general character has been well described, operational models still struggle to replicate the intensity and duration even though improvement has been noted in the timing and location of onset. Climatologically, models still underestimate their occurrence. In the last 40 years, investigators have used case study analysis and numerical and theoretical models to understand the onset and maintenance of blocking. Comparatively few have examined block decay. This review endeavors to cover the highlights of the history of blocking investigations, especially in the last few decades, in order to provide an understanding for a more general scientific audience.

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Section: Observational Studies Of Blocking and Extreme Weathermentioning

confidence: 99%

Atmospheric blocking events: a review

Lupo

2020

Annals of the New York Academy of Sciences

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“…Prolonged sequential periods with blocking situations leads to increased drought severity and its geographic expansion. It has been shown that four consecutive pentades per month creates stable conditions for the beginning of drought [10].…”

Section: Dynamics Of the Regional Atmocpheric Processesmentioning

confidence: 99%

Some Meteorological Aspects of Severe Agricultural Drought in the Northern Black Sea Region in 2019–2020

Semenova

2021

The 4th International Electronic Conference on Atmospheric Sciences

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An overview of the meteorological and synoptic conditions for the formation of the severe drought which occurred in 2019–2020 in the southwest of Ukraine showed that the combination of several adverse factors influenced the evolution of the drought over a long period of time. Analysis of two types of drought indices and anomalies in the tropospheric pressure fields showed that the formation of a precipitation deficit began long before the occurrence of drought, due to the repetition of high pressure fields in the region, through which the intensity of the drought increased gradually.

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“…The HTC describes atmospheric drought if the accumulation of air temperature in the preceding period outperforms the accumulated precipitation during the period under consideration. Regarding the HTC values, very dry and dry conditions were assumed for HTC ≤ 0.7 and 0.7 < HTC ≤ 1.0, respectively [4]; similar thresholds were found for studies in Central Europe, applying the HTC for analyzing moisture conditions [37,38]. HTC is included in the Handbook of Drought Indicator and Indices [39] as one of the indices useful for defining atmospheric drought.…”

Section: Hydrothermal Coefficientmentioning

confidence: 99%

Drought Model DISS Based on the Fusion of Satellite and Meteorological Data under Variable Climatic Conditions

et al. 2020

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The use of effective methods for large-area drought monitoring is an important issue; hence, there have been many attempts to solve this problem. In this study, the Drought Information Satellite System (DISS) index is presented, based on the synergistic use of meteorological data and information derived from satellite images. The index allows us to monitor drought phenomena in various climatic and environmental conditions. The approach utilizes two indices for constructing a drought index: (1) the hydrothermal coefficient (HTC), which characterizes meteorological conditions across the study area over a long-term period; and (2) the temperature condition index (TCI) derived from Moderate-resolution Imaging Spectroradiometer (MODIS) data, which refers instantaneous land surface temperature (LST) to long-term extreme values. The model for drought assessment based on the DISS index was applied for generating drought index maps for Poland for the 2001–2019 vegetation seasons. The performance of the index was verified through comparison of the extent of agricultural drought to the reduction in cereal and maize yield. Analysis of variance revealed a significant relationship between the area of drought determined by the drought index and the decrease in cereal yield due to unfavorable growth conditions. The presented study proves that the proposed drought index can be an effective tool for large-area drought monitoring under variable environmental conditions.

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Droughts and dynamics of synoptic processes in the south of the East European Plain at the beginning of the twenty-first century

Cited by 17 publications

References 8 publications

Atmospheric blocking events: a review

Atmospheric blocking events: a review

Some Meteorological Aspects of Severe Agricultural Drought in the Northern Black Sea Region in 2019–2020

Drought Model DISS Based on the Fusion of Satellite and Meteorological Data under Variable Climatic Conditions

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