The relationship between summer sea ice extent in Hudson Bay and the Arctic Ocean via the atmospheric circulation

• Published in: Atmospheric Science Letters
• Main Authors: Ogi, Masayo, Barber, David G., Rysgaard, Søren
• Format: Article in Journal/Newspaper
• Language: English
• Published: 2016
• Subjects: Air temperature; Arctic Ocean sea ice; Atmospheric circulation; Hudson Bay sea ice; Trend and interannual variation; Arctic; Arctic Ocean; Hudson; Hudson Bay; Sea ice
• Online Access: https://pure.au.dk/portal/da/publications/the-relationship-between-summer-sea-ice-extent-in-hudson-bay-and-the-arctic-ocean-via-the-atmospheric-circulation(36f0d674-b260-4a29-946c-e60e8571af2b).html; https://doi.org/10.1002/asl.709; http://www.scopus.com/inward/record.url?scp=84991000271&partnerID=8YFLogxK

The trends and interannual variations of summer sea ice extents (SIEs) in both Hudson Bay and the Arctic Ocean are investigated in association with variations in atmospheric circulation and air temperature. The summer SIE variabilities of both Hudson Bay and the Arctic Ocean are well correlated and have a strong negative trend. The negative SIE trends are associated with a summer atmospheric circulation pattern that is characterized by positive anomalies over the Arctic Ocean and negative anomalies over mid-latitudes. The trends are also connected with warm air temperatures over mid- and high-latitudes. The atmospheric circulation and air temperature regressed on the summer SIEs in both Hudson Bay and the Arctic Ocean are quite similar to these trend patterns. On the other hand, the year-to-year variations of the detrended summer SIEs in both Hudson Bay and the Arctic Ocean are not correlated. The summer atmospheric circulation and air temperature over the Arctic Ocean have contributed to the detrended summer Arctic Ocean SIE. In contrast, the detrended summer Hudson Bay SIE is controlled by atmospheric circulation and air temperature in the previous spring.