Sentences with phrase «varying thicknesses of sea ice»
Varying thicknesses of sea ice are shown here, from thin, nearly transparent layers to thicker, older sea ice covered with snow.
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Much of the Arctic Ocean is covered by sea ice that varies in extent and thickness seasonally.
Therefore, due to entirely natural variations in spring snow conditions over sea ice (and thickness of the ice), 2 polar bear population sizes can vary by region.
In addition, records from Russian coastal stations show the extent and thickness of sea ice has varied greatly over 60 - to 80 - year periods during the last 125 years.