Facts about the Arctic Ocean

1. 08

   Midnight sun phenomena occur for 24 hours continuously across the Arctic Ocean north of 66.5 degrees latitude during summer solstice, reversing to polar night during winter solstice.

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2. 07

   Polar bears inhabiting the Arctic Ocean region number approximately 26,000 individuals across 19 recognized populations, with their survival dependent on sea ice platforms for hunting seals.

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3. 06

   Lomonosov Ridge, an underwater mountain range spanning 1,800 kilometers across the Arctic Ocean, connects the Russian continental shelf to the Canadian Arctic Archipelago.

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4. 05

   Five major river systems including the Mackenzie, Ob, and Yenisei discharge approximately 3,350 cubic kilometers of freshwater into the Arctic Ocean annually.

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5. 04

   The Arctic Ocean's salinity averages 34.5 parts per thousand, significantly lower than the Atlantic Ocean's 35 parts per thousand due to massive freshwater input from Siberian rivers.

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6. 03

   Approximately 4 million square kilometers of sea ice vanish from the Arctic Ocean each summer, representing roughly 50 percent of the winter maximum extent.

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7. 02

   Covered by sea ice nine months annually, the Arctic Ocean's surface temperature plummets to minus 40 degrees Celsius during winter months.

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8. 01

   Beneath the sea ice, the Arctic Ocean contains approximately 13 percent of the world's undiscovered oil reserves according to 2008 USGS estimates.

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