But the lowest summer ice cap on record put sea ice far north of the outer continental shelf , the shallow , life-rich shelf of ocean bottom in the Bering and Chukchi seas.

• 但夏季冰冒的最低纪录是在远方北边的外围大陆棚还有海冰存在。大陆棚是在白令海峡和处克其海峡，又浅又充满生物的海底。