The influence of the winter Arctic oscillation on the northern Russia spring temperatureстатья
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Дата последнего поиска статьи во внешних источниках: 11 апреля 2019 г.
Аннотация:Correlation and trend analyses are applied to examine relationships between the northern Russia snow/ice season surface
air temperature (SAT) and winter circulation, represented by the January–March Arctic oscillation (AO) index. The
1935–99 series of winter and spring monthly SAT from five stations are used, with the winter season being defined as
January–March and the spring season being defined specifically for each station in accordance with local snow/ice season
duration from April–May through April–July.
It is shown that the influence of the winter circulation on SAT is evident at least until the end of snow/ice season, which
suggests that this influence is implemented via feedbacks provided by snow and sea ice. The winter AO accounts for
some 25–50% (15–20%) of the winter (spring) SAT variance. More than 50% of the 30 year (1968–97) trends in both
winter and spring SAT for northwestern Russia and more than 40% for northwestern Siberia are linearly correlated with
the winter AO. It is proposed that in the Arctic Ocean regions, where snow and ice do not melt completely, the winter
AO influence on SAT is likely to be evident at least until the next year’s winter. Copyright 2002 Royal Meteorological
Society.