cuatro.step one EHS throughout 1951–1980
The only EHS covering at least three stations during the first half of the 60-year study period occurred in 1972. Observed at 16 stations, it covered vast areas of western Russia and some adjacent areas to the north (Fig. 1). Indeed, this exceptionally hot summer was spatially the second largest during the study period and in the northern half of the area examined it was the hottest (Table 4). During all three summer months, the average temperature was above the long-term average, but August was the hottest. In the central part of the area, this was the hottest August of the entire period. The temperature difference between the long-term average and the temperature of the particular season ranged from 2.3 to 2.7 °C in the far north, to 3.6–3.9 °C in the far south, to 4.5 °C at Tambov (t ? t av + 3?). Days with a temperature higher than 30 °C were recorded even in the north, where they were very rare in other years, while in the south there were 50 such days (two to three times more than the average). In the south, there were also days with a maximum temperature greater than 35 °C. Throughout the area there were cases of hot nights, i.e., 24-h days with a minimum temperature higher than 20 °C, including for example six such days in Arhangel’sk (compared to 0.4 on average) and 17 in Voronez (normally 2.6).
This type of uncommon thermal defects when you look at the western Russia was indeed considering a good quasi-stationary anticyclonic stream (Bardin 2007). Present research (Zveryaev mais aussi al. 2012) shows that summer time regarding 1972 is actually characterised from the positive phase of one’s North Atlantic Oscillation.
cuatro.2 EHS throughout the 1981–1990
New outstanding summer of the season covered this new central and you may east areas of European Russia (Fig. 2). This new EHS was observed in the seven stations, like the easternmost Ivdel’ (in which it absolutely was the only particularly june into the several months) and you may Ekaterinburg. In the Kirov and you will Perm, it was the hottest june of period. The average heavens heat along russian bride mail the area is actually greater than the brand new long-title mediocre of the dos.5–3.step three °C. The warmth was more than the a lot of time-name average in every three summer season, however, August is actually the only real incredibly very hot few days and simply on half every programs (such as the top of whole months during the Ivdel’, Ekaterinburg and you may Perm), if you are June and you may July did not meet with the standard. There is certainly numerous weeks which have a max heat greater than 30 °C, particularly in the latest southern area (20–25, on average nine–11). Just regarding southwestern part of the city, there had been days which have minimal temperatures surpassing 20 °C (Dining table 5).
The summertime out-of 1988 try incredibly sizzling hot and you can, such as 1981, sky temperature defects secure main and you will eastern elements of European Russia, even though the area affected is actually faster involving simply four channels (Fig. 2). From inside the around three northern programs, this was the latest, and also in your situation off Kotlas, also the just EHS from the studies period. The essential difference between the common a lot of time-name and EHS average temperature ranged regarding 2.step three to three.step 1 °C along side urban area. July turned out such as for instance sizzling hot (on particular programs the latest of one’s period). Simply into the Ekaterinburg did the new temperatures prevent lacking conference the fresh conditions in just about any of your months. There had been more ten months that have a maximum heat significantly more than 31 °C at all the new programs, along with brand new south, the number was almost 20 (than the between three and you will half a dozen on average). Just remote cases of weeks that have at least temperatures more than 20 °C was basically registered about southern area of the affected area (Dining table 5).