Atmospheric Circulation Response to Heat Flux Anomalies in a Two-Dimensional Baroclinic Model of the Atmosphereстатья
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 1 апреля 2020 г.
Аннотация:The response of large-scale atmospheric circulation to the anomalous Barents and Kara sea icefree
surface heating, which has been observed over the past two decades, is considered. For this purpose, a
simplified two-dimensional baroclinic atmospheric model obtained by averaging hydrothermodynamic
equations over height is used, as well as its two-layer analogue with the effect of anomalous heating and, hence, of horizontal baroclinicity being concentrated within the surface-adjacent 1- to 2-km-thick atmospheric layer, which fits Arctic conditions more closely. Quasi-geostrophic approximations are derived for both models; for a single-layer model (in the adiabatic and inviscid approximation), the formulation is also given in terms of Nambu mechanics. Both models demonstrate the appearance of a center of increased surface air temperature over the area of anomalous heating; a slight decrease in surface pressure there; and, finally, anticyclonic circulation in the bulk of the atmosphere. The model results are shown to be extremely sensitive to the parameterization of the Ekman boundary layer.