Ozone Content over the Russian Federation in the Second Quarter of 2020

Ozone Content over the Russian Federation in 2020

“…- As noted in [11,12], such anom a lies in the win ter-spring sea sons in the north ern re gions of Rus sia were re corded ear lier in 1997 and 2011. How ever, in 2020 the se ries of neg a tive anom a lies was es pe cially du rable and fin ished a month later than the anom aly in 2011.…”

“…The basic results of total ozone (TO) observations for the first three quarters of 2020 were described before in [10][11][12]. The normals (multiyear means) of TO over Russia and adjoining areas computed for different months of the fourth quarter for the period of 1974-1984 were presented in [4].…”

“…1e) at most sta tions in Rus sia are neg a tive and are in the range from -14 to 3% for all an a lyzed sta tions. The larg est de vi a tions were reg istered on the Arc tic Ocean is lands, in the north of the Krasnoyarsk krai and Yakutia, which was an ef fect of the large and du ra ble ozone anom aly in the win ter-spring pe riod [11,12]. The max i mum de fi ciency of an -130 IVANOVA et al nual TO means (14%) was reg is tered at Tura, Olenek, and Kotel'nyi Is land sta tions.…”

“…It should es pe cially be noted that the change in po lar Ant arc tic ozone in the win ter-spring sea son of 2020 followed to some ex tent the vari a tion in po lar Arc tic ozone in the North ern Hemi sphere winter-spring sea son. On both poles in the men tioned pe riod, the neg a tive de vi a tions of po lar ozone from the multiyear means were grad u ally in creas ing and, hav ing reached the ab so lute max ima, were dis ap pear ing very slowly and for a long time [10][11][12]. For com par i son, Fig ure 6 pres ents the de vi a tions of po lar Arc tic ozone from the multiyear means from Jan u ary 1 to April 20, 2020 and the de vi a tions of po lar Ant arc tic ozone from the multiyear means in 2015 and 2020 from Au gust 22 to De cem ber 9 (110 days).…”