Circulation epochs based on the Vangengeim-Girs large scale patterns (1891–2010)

Degirmendžić, Jan; Kożuchowski, Krzysztof

doi:10.18778/1427-9711.17.01

Cited by 8 publications

(13 citation statements)

References 4 publications

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“…The moment the annual air temperature regime in Wrocław changed and a strong upward trend appeared in a series happened in the years 1987-1989, which is very close to the change of the circulation epoch E to W according to Savichev et al (2015) in 1989/1990 and according to the divisions by Degirmendžić and Kożuchowski (2018) in the years 1991/1992.…”

Section: Discussion Of the Results And Conclusionsupporting

confidence: 67%

“…It indicates only that (Savichev et al, 2015) made of the series of macro-types frequency solely to the year 2014). Degirmendžić and Kożuchowski (2018) distinguish the same epochs in the years 1951-2018, and their limits show small shifts in relation to the limits set by Savichev et al (2015). According to Degirmendžić and Kożuchowski (2018), the end of the E+C Epoch falls in 1969, the beginning and the end of the E Epoch, respectively, in 1970 and 1991, and the beginning of the W Epoch in 1992.…”

Section: Discussion Of the Results And Conclusionsupporting

confidence: 60%

“…Degirmendžić and Kożuchowski (2018) distinguish the same epochs in the years 1951-2018, and their limits show small shifts in relation to the limits set by Savichev et al (2015). According to Degirmendžić and Kożuchowski (2018), the end of the E+C Epoch falls in 1969, the beginning and the end of the E Epoch, respectively, in 1970 and 1991, and the beginning of the W Epoch in 1992. In view of the different methods of defining the boundaries of macro-circulation epochs by the quoted authors and the different moments of the beginning of the analysis, these differences are of little significance.…”

Section: Discussion Of the Results And Conclusionsupporting

confidence: 60%

See 2 more Smart Citations

Role of Internal Variability of Climate System in Increase of Air Temperature in Wrocław (Poland) in the Years 1951–2018

Marsz¹,

Styszyńska²,

Bryś

et al. 2021

Quaestiones Geographicae

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In the course of analysing the annual air temperature in Wrocław (TWr), a rapid change of the thermal regime was found between 1987 and 1989. TWr increased by >1°C, a strong, statistically significant positive trend emerged. The analysis of processes showed that strong warming in the cold season of the year (December–March) occurred as a result of an increase in the NAO intensity and warming in the warm season because of increased sunshine duration in Wrocław (ShWr). Multiple regression analysis has shown that the winter NAO Hurrell's index explains 15% of TWr variance, and the ShWr of the long-day (April–August) period 49%, whereas radiative forcing 5.9%. This indicates that the factors incidental to the internal variability of the climate system explain 64% of the TWr variability and the effect of increased CO2 concentration only ~6%. The reason for this rapid change of the thermal regime was a radical change in macro-circulation conditions in the Atlantic-European circular sector, which took place between 1988 and 1989. The heat, which is the cause of warming in Wrocław, comes from an increase in solar energy inflow (April–August) and also is transported to Europe from the North Atlantic surface by atmospheric circulation (NAO). These results indicate that the role of CO2 in shaping the contemporary temperature increase is overestimated, whereas the internal variability of the climate system is underestimated.

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Section: Discussion Of the Results And Conclusionsupporting

confidence: 67%

Section: Discussion Of the Results And Conclusionsupporting

confidence: 60%

Section: Discussion Of the Results And Conclusionsupporting

confidence: 60%

See 1 more Smart Citation

Role of Internal Variability of Climate System in Increase of Air Temperature in Wrocław (Poland) in the Years 1951–2018

Marsz¹,

Styszyńska²,

Bryś

et al. 2021

Quaestiones Geographicae

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“…They are associated with increased or weaker appearance of certain types of atmospheric circulation, which favours the incidence of deficient or excessive precipitation. At the turn of the nineteenth and twentieth centuries, the zonal circulation (W) was prevailing; later, meridional forms developed, and after 1990 the zonal type came to dominate again (Degirmendžić and Kożuchowski 2018). In Central Europe, an increase in the intensity of air advection from the west at the end of the twentieth century was reported and confirmed (Ustrnul 2007), especially in the winter months (Bartoszek 2017b).…”

Section: Discussion and Summarymentioning

confidence: 95%

“…The occurrence of the so-called circulation epochs (e.g. Sidorenkov and Orlov 2008;Degirmendžić and Kożuchowski 2018;Kononova and Lupo 2020) is one of the natural causes of the observed climate change. They are associated with increased or weaker appearance of certain types of atmospheric circulation, which favours the incidence of deficient or excessive precipitation.…”

Section: Discussion and Summarymentioning

confidence: 99%

The influence of atmospheric circulation on the occurrence of dry and wet periods in Central Poland in 1954–2018

Araźny

Bartczak

Maszewski³

et al. 2021

Theor Appl Climatol

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This work presents the influence of atmospheric circulation on the occurrence of dry and wet periods in the central Polish region of Kujawy. The material on which the authors relied encompassed monthly totals of precipitation obtained from 10 weather stations in the period 1954–2018. Both dry and wet periods have been identified on the basis of monthly values of the Standardised Precipitation Index (SPI). Additionally, the calendar of circulation types over Central Poland was used to determine the atmospheric circulation indices: western (W), southern (S) and cyclonicity (C). The analyses have indicated that the region concerned experiences low precipitation totals in comparison with the rest of Poland. According to the circulation indices W, S and C, for Central Poland, the air mass advection from the West prevails over that from the East. Moreover, a slightly more frequent inflow of air from the South than from the North has been observed. The frequency of anticyclonic situations is higher than that of the cyclonic types in this part of Europe. Drought spells occurred in the study area at a clear dominance of anticyclonic circulation, with the inflow of air mostly from the North and with increased westerly circulation. On the other hand, the occurrence of wet periods was mainly influenced by cyclonic circulation during the advection of the masses from the South and West. Dry and wet periods accounted for 28% and 27% of the study period, respectively.

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The thermal state of the North Atlantic and macro‐circulation conditions in the Atlantic‐European sector, and changes in sunshine duration in Central Europe

Marsz¹,

Matuszko

Styszyńska³

2021

Intl Journal of Climatology

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This article explains the reasons for the long-term variability in sunshine duration (SD) in Central Europe. It presents a recently discovered mechanism regulating changes in sunshine duration, not described so far in the literature. The periods of global dimming and global brightening were linked with changes in the annual frequency of the macrotypes of the middle-tropospheric circulation and the variability in the surface component of the thermohaline circulation in the North Atlantic (NA THC). On the basis of the totals of annual sunshine duration from the years 1951-2015 from 21 stations located in the Netherlands,

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Circulation epochs based on the Vangengeim-Girs large scale patterns (1891–2010)

Cited by 8 publications

References 4 publications

Role of Internal Variability of Climate System in Increase of Air Temperature in Wrocław (Poland) in the Years 1951–2018

Role of Internal Variability of Climate System in Increase of Air Temperature in Wrocław (Poland) in the Years 1951–2018

The influence of atmospheric circulation on the occurrence of dry and wet periods in Central Poland in 1954–2018

The thermal state of the North Atlantic and macro‐circulation conditions in the Atlantic‐European sector, and changes in sunshine duration in Central Europe

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