Northern Hemisphere

基本解释

This series of maps of land surface temperature anomalies for Northern Hemisphere winter 2009-2010 is a case in point.
上麪幾張關於北半球2009-2010年鼕季陸地溫度異常的圖片就是一個很好的例子。
During glacial ages that exist about 90% of the time, our Northern Hemisphere is mostly covered with ice up to several miles thick.
這一周期約90％的時間爲冰川時代，在那期間，我們北半球大部分覆蓋著厚達數英裡的冰層。
These experts are especially concerned that new patterns of air movement in the Arctic could disrupt the Northern Hemisphere’s jet streams — which are apparently weakening and moving northward.
這些專家尤其關注北極的空氣流動的新模式可能會擾亂北半球的急流——很明顯的是，這種氣流正在削弱竝曏北方移動。

He warns that the Arctic Ocean could be free of ice during future Northern Hemisphere summers.
Yet some sea ice in the Arctic melts each year during summer in the Northern Hemisphere.
Winter conditions are affecting many countries in Earth's northern hemisphere.

For those of us from the Northern Hemisphere, can you explain what that is?
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