Comparison of Atmospheric Circulation in the Area of Spitsbergen in 1920–1950 and in the Modern Warming Period

Svyashchennikov, Pavel N.; Prokhorova, Uliana; Иванов, Б. В.

doi:10.3103/s1068373920010033

Cited by 5 publications

(2 citation statements)

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“…The increased frequency of E circulation form (according to Girs–Vangengeim typology) in the warm season over the Norwegian and Barents seas during the CAW was also indicated by Svyashchennikov et al . (2020). However, the regression between summer SAT at Svalbard Airport was not statistically significant for series with trends, and was negative for de‐trended series.…”

Section: Summary and Discussionmentioning

confidence: 99%

“…The contribution of atmospheric circulation to the ETCAW was assessed by both the modelling of climate processes and by studies based on station data which, however, are scarce for that period. A preference for more meridional circulation patterns was found over the high latitudes of the North Atlantic during the early 20th‐century climatic fluctuation (Petterssen, 1949; Overland et al ., 2008; Grant et al ., 2009; Wood and Overland, 2010; Johannessen et al ., 2016; Svyashchennikov et al ., 2020). An increase in the intensity of southerly (Wood and Overland, 2010; Łupikasza and Niedźwiedź, 2019) or south‐westerly to westerly flow (Bengtsson et al ., 2004) through the passage between Spitsbergen and Northern Norway into the Barents Sea contributed to ETCAW.…”

Section: Introductionmentioning

confidence: 99%

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Importance of regional indices of atmospheric circulation for periods of warming and cooling in Svalbard during 1920–2018

Łupikasza

Niedźwiedź

Przybylak

et al. 2021

Intl Journal of Climatology

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The Arctic has experienced prominent climate warming, at the beginning of the 20th century and currently. Comparing the driving mechanism during these periods helps to explain the causes of contemporary climate change. Our study explores the impact of regional circulation on Svalbard's surface air temperature (SAT, 2 m above ground). We used air temperature data from Svalbard Airport, Bjørnøya stations, and three regional circulation indices that describe the frequency of cyclonic conditions, zonal circulation, and meridional circulation. The indices were calculated for four circulation areas with differing circulation conditions and, therefore, may have various impacts on long-term changes in SAT. This was checked for the entire study period , and 30-year sub-periods representing the most prominent climatic events: the early 20th-century Arctic warming (ETCAW), contemporary Arctic warming (CAW), and a cold period between them (CAP). In autumn and winter, the deviations in SAT from the long-term average during warm and cold periods were almost twice as large at Svalbard Airport as at Bjørnøya. In these seasons, the ETCAW was significantly warmer than the subsequent cold period, which was not the case for summer and spring. However, long-term trends in the regional circulation indices were more evident in summer and spring than in autumn and winter. Air temperature was the most strongly influenced by meridional circulation over the eastern circulation areas, with the exception of spring, when air temperature variability was more affected by zonal circulation.The recent warming weakened the relationship between SAT and the indices in summer. We attributed the ETCAW in autumn to a southerly advection of sensible heat. During the same historical period, the impact of the indices was much weaker in winter. In winter during the CAP, there was a higher frequency of northern air advection, particularly over the northern part of the Greenland Sea.

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Section: Summary and Discussionmentioning

confidence: 99%