This plot shows average sea level pressure in the Arctic in millibars for September 2022.
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The Northwest Passage has started to freeze up, particularly the northern route through Parry Channel, but much of the Canadian Archipelago remained essentially ice free through the end of the month. An open water passage has nevertheless persisted along the Northern Sea Route. A tongue of ice continued to extend southward in the East Siberian Sea, and a portion of ice floes broke away from the main pack ice off the tip of that tongue. Extent was below average in all sectors of the Arctic Ocean, apart from the northern shore of the Canadian Arctic Archipelago, where ice is almost invariably pushed up against the coast by winds and ocean currents. This resulted in a tie for the tenth lowest minimum daily extent in the satellite record. Ice extent declined at a faster than average rate from the beginning of the month until the minimum was reached on September 18 (Figure 1b). The annual minimum extent was reached on September 18 and the autumn freeze-up is now well underway. Extent was 1.54 million square kilometers (595,000 square miles) below the 1981 to 2010 average and 1.30 million square kilometers (502,000 square miles) above the record minimum set in 2012. The September 2022 average Arctic sea ice extent was 4.87 million square kilometers (1.88 million square miles), tying with 2010 for eleventh lowest in the satellite record (Figure 1a). Sea Ice Index data.Ĭredit: National Snow and Ice Data Center
The gray areas around the median line show the interquartile and interdecile ranges of the data. 2022 is shown in blue, 2021 in green, 2020 in orange, 2019 in brown, 2018 in magenta, and 2012 in dashed brown.
The graph above shows Arctic sea ice extent as of October 3, 2022, along with daily ice extent data for four previous years and the record low year.
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