| 31. | When low-temperature ice covers the Arctic Ocean there is little evaporation or global ocean water circulation.
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| 32. | The record suggests that altering the present ice cover would have profound effects on future climates.
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| 33. | They have tracked the ebb and growth of the ice cover for the past five years.
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| 34. | Ice cover is continuous only in the bays and forms floating patches in the open sea.
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| 35. | The water is shallow and rocky, and ice covers the Gulf of Finland in winter months.
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| 36. | With this dependence, the Arctic Ocean experiences variations due to seasonal changes in sea ice cover.
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| 37. | The ice covers the White Sea from beginning of December to the first decade of May.
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| 38. | The floating sea ice cover of the Arctic Ocean shrank to record low levels this year.
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| 39. | During the summer sea ice covers of ocean.
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| 40. | Ice cover decreased to by 1987 1988 and to by 2005, 50 % of the 1850 area.
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