雅思听力材料解析之The Arctic Ocean

　　雅思听力材料解析之The Arctic Ocean，我们很多小朋友一直在问老师，雅思听力到底好不好复习，那么今天小编在这里明确的给大家说一声，其实雅思听力是非常容易拿分的内容。

　　The Arctic Ocean

　　The Arctic Ocean (also called Northern Icy Ocean or Northern Ocean), located in theNorthern Hemisphere and mostly in the Arctic north polar region, is the smallest and shallowest of the world's five major oceanic divisions. The International Hydrographic Organization (IHO) recognizes it as an ocean, although some oceanographers call it the Arctic Mediterranean Sea or simply the Arctic Sea, classifying it a mediterranean sea or an estuary of the Atlantic Ocean. Alternatively, the Arctic Ocean can be seen as the northernmost part of the all-encompassing World Ocean.

　　Almost completely surrounded by Eurasia and North America, the Arctic Ocean is partly covered by sea icethroughout the year (and almost completely in winter). The Arctic Ocean's temperature and salinity varyseasonally as the ice cover melts and freezes; its salinity is the lowest on average of the five major oceans, due to low evaporation, heavy freshwater inflow from rivers and streams, and limited connection and outflow to surrounding oceanic waters with higher salinities. The summer shrinking of the ice has been quoted at 50%. The US National Snow and Ice Data Center (NSIDC) uses satellite data to provide a daily record of Arctic sea ice cover and the rate of melting compared to an average period and specific past years.

　　雅思听力材料解析之The Arctic Ocean到这里就要和大家说再见了，同学们一定要在平时的复习中更加用功，这样才能不被雅思考试所难到。