![]() October 2023 compared to previous yearsįigure 4. ![]() This pattern created strong winds along the Russian Arctic coast. The atmospheric circulation featured weak high sea level pressure centered over the North Pole and fairly strong low pressure centered on the Norwegian Sea and north-central Siberia (Figure 2b). The Chukchi and East Siberian Seas experienced near-average temperatures while temperatures were below average over the Bering Strait and the Barents and Norwegian Seas. Temperatures were modestly above average across the pole and over the Laptev and Kara Seas. Yellows and reds indicate above average air pressures blues and purples indicate below average air pressures.Ĭredit: NSIDC courtesy NOAA Earth System Research Laboratory Physical Sciences LaboratoryĪir temperatures over the Arctic Ocean at the 925 mb level (about 2,500 feet above the surface) were mostly above average during October, particularly in and around the Canadian Archipelago, which saw temperatures of 4 to 5 degrees Celsius (7 to 9 degrees Fahrenheit) above average (Figure 2a). This plot shows average sea level pressure in the Arctic in millibars for October 2023. Ice growth within the channels of the Canadian Archipelago closed off the Northwest Passage. Open water remained in the Beaufort and Chukchi Seas at the end of October. ![]() The freeze up was particularly rapid along the Siberian Seas where the ice cover expanded to the coast by the end of the month. Overall, during October sea ice extent increased by 119,800 thousand square kilometers (46,300 square miles) per day, which is faster than the 1981 to 2010 average of 89,200 square kilometers (34,400 square miles) per day (Figure 1b). Sea Ice Index data.Ĭredit: National Snow and Ice Data CenterĪverage Arctic sea ice extent for October 2023 was 6.37 million square kilometers (2.46 million square miles), seventh lowest in the 45-year satellite record (Figure 1a). The gray areas around the median line show the interquartile and interdecile ranges of the data. 2023 is shown in blue, 2022 in green, 2021 in orange, 2020 in brown, 2019 in magenta, and 2012 in dashed brown. The graph above shows Arctic sea ice extent as of November 1, 2023, along with daily ice extent data for four previous years and the record low year. ![]()
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