ATMOSPHERIC BLOCKING IN THE NORTHERN HEMISPHERE AND ITS CONNECTION TO ARCTIC SEA ICE LOSS

Using the data of the INM RAS model, the sensitivity of the characteristics of atmospheric blocking to the dynamics of the Arctic sea ice is investigated. The changes in the duration and intensity of blocking events with a decrease in the Arctic ice amount are estimated. Such mechanisms as decreasing albedo and increasing carbon dioxide concentration are considered. The possibility of using integrated regional enstrophy to assess the stability of a circulation regime is demonstrated on the example of a blocking episode in the Kara Sea.