Arctic Ocean
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north poleglaciericebergpermafrosttundrapolar bearwalrussealnarwhalbelugaorcaplanktonkrillcodhalibutarcticborealpolarfrozenfrigidfrostsnowblizzardsleetcurrenttidebasinshelfabysstrenchsalinitytemperatureclimateecologybiodiversitymigrationhibernationlatitudelongitudehemisphereequatorantarcticagreenlandalaskacanadarussianorwaydenmarkicelandsiberiaaurora borealisnorthern lightssolsticeequinoxmidnight sunice capice sheetfloedriftoceanographyhydrologygeologyglaciologymeteorologyenvironmentconservationwarmingmeltingerosionsea levelshipping laneicebreakerexpeditionnavigationcompassmagnetism