2015考研英语阅读北极海域
<p> <span word="The">The</span> <span word="Arctic">Arctic</span></p><p> 北极海域</p><p> <span word="Tequila">Tequila</span> <span word="sunset">sunset</span></p><p> 龙舌兰日落</p><p> <span word="Global">Global</span> <span word="warming">warming</span> <span word="may">may</span> <span word="make">make</span> <span word="the">the</span> <span word="northernmost">northernmost</span> <span word="oceanless">oceanless</span> <span word="productive">productive</span>, <span word="not">not</span> <span word="more">more</span> <span word="so">so</span></p><p> 全球变暖对北极海域生产力的负面影响</p><p> <span word="ON">ON</span> <span word="SEPTEMBER">SEPTEMBER</span> 16<span word="th">th</span> 2012, <span word="at">at</span> <span word="the">the</span> <span word="height">height</span> <span word="of">of</span> <span word="the">the</span> <span word="summer">summer</span> <span word="melt">melt</span>, <span word="the">the</span> <span word="Arctic">Arctic</span> <span word="Ocean">Ocean</span> <span word="s">s</span> <span word="ice">ice</span> <span word="sheethad">sheethad</span> <span word="shrunk">shrunk</span> <span word="to">to</span> <span word="an">an</span> <span word="area">area</span> <span word="of">of</span> 3.41<span word="m">m</span> <span word="square">square</span> <span word="kilometres">kilometres</span>, <span word="half">half</span> <span word="what">what</span> <span word="it">it</span> <span word="was">was</span> <span word="in">in</span> 1979.</p><p> 2012年9月16日，随着夏日的深入，北冰洋的冰原面积缩减到341万平方公里，该数字仅为1979年同期面积的二分之一。</p><p> <span word="And">And</span> <span word="its">its</span> <span word="volume">volume</span> <span word="had">had</span> <span word="shrunk">shrunk</span> <span word="faster">faster</span> <span word="still">still</span>,<span word="to">to</span> <span word="a">a</span> <span word="quarter">quarter</span> <span word="of">of</span> <span word="what">what</span> <span word="it">it</span> <span word="was">was</span> <span word="in">in</span> 1979, <span word="for">for</span> <span word="the">the</span> <span word="sheet">sheet</span> <span word="is">is</span> <span word="getting">getting</span> <span word="thinner">thinner</span> <span word="as">as</span> <span word="well">well</span> <span word="as">as</span> <span word="smaller">smaller</span>.</p><p> 同时，就冰原体积而言，目前北极冰原的体积仅为1979年的四分之一，其融化速度之快可想而知。如今的北极地区，不仅冰原的面积在减少，其体积也在缩小。</p><p> <span word="One">One</span> <span word="culprit">culprit</span> <span word="is">is</span> <span word="global">global</span> <span word="warming">warming</span>, <span word="which">which</span> <span word="is">is</span> <span word="fiercer">fiercer</span> <span word="at">at</span> <span word="the">the</span> <span word="poles">poles</span> <span word="than">than</span> <span word="elsewhere">elsewhere</span>.</p><p> 而这一现象的罪魁祸首便是全球变暖。同时，相比于其他海域而言，全球变暖对两极地区的冲击尤为明显。</p><p> <span word="The">The</span> <span word="world">world</span> <span word="s">s</span> <span word="average">average</span> <span word="temperature">temperature</span> <span word="in">in</span> 2012 <span word="was">was</span> <span word="nearly">nearly</span> 0.5<span word="C">C</span> <span word="above">above</span> <span word="the">the</span> <span word="average">average</span> <span word="for">for</span> 1951-80.</p><p> 与1951-1980年相比，2012年全球均温上涨了0.5，</p>
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