2015考研英语阅读北极气候变化
<p> <span word="Climate">Climate</span> <span word="change">change</span> <span word="in">in</span> <span word="the">the</span> <span word="Arctic">Arctic</span></p><p> 北极气候变化</p><p> <span word="Beating">Beating</span> <span word="a">a</span> <span word="retreat">retreat</span></p><p> 仓惶撤退</p><p> <span word="Arctic">Arctic</span> <span word="sea">sea</span> <span word="ice">ice</span> <span word="is">is</span> <span word="melting">melting</span> <span word="far">far</span> <span word="faster">faster</span> <span word="than">than</span> <span word="climatemodels">climatemodels</span> <span word="predict">predict</span>. <span word="Why">Why</span>?</p><p> 北极海冰正在以比气候模型所预测的快得多的速度融化，为什么?</p><p> <span word="ON">ON</span> <span word="SEPTEMBER">SEPTEMBER</span> 9<span word="th">th</span>, <span word="at">at</span> <span word="the">the</span> <span word="height">height</span> <span word="of">of</span> <span word="its">its</span> <span word="summertime">summertime</span> <span word="shrinkage">shrinkage</span>, <span word="ice">ice</span> <span word="covered">covered</span> 4.33<span word="m">m</span> <span word="squarekm">squarekm</span>, <span word="or">or</span> 1.67<span word="m">m</span> <span word="square">square</span> <span word="miles">miles</span>, <span word="of">of</span> <span word="the">the</span> <span word="Arctic">Arctic</span> <span word="Ocean">Ocean</span>, <span word="according">according</span> <span word="to">to</span> <span word="America">America</span> <span word="s">s</span> <span word="National">National</span> <span word="Snow">Snow</span> <span word="andIce">andIce</span> <span word="Data">Data</span> <span word="Centre">Centre</span>.</p><p> 据美国国家冰雪中心监测，今年的9月9日，处于夏季收缩极值的北极海冰仅仅覆盖了433万平方公里，或相当于167万平方英里的北冰洋洋面。</p><p> <span word="That">That</span> <span word="is">is</span> <span word="not">not</span> <span word="a">a</span> <span word="record">record</span> <span word="lownot">lownot</span> <span word="quite">quite</span>.</p><p> 这虽未创下最低记录，但也已相去不远。</p><p> <span word="But">But</span> <span word="the">the</span> <span word="actual">actual</span> <span word="record">record</span>, 4.17<span word="m">m</span> <span word="squarekm">squarekm</span> <span word="in">in</span> 2007, <span word="was">was</span> <span word="the">the</span> <span word="product">product</span> <span word="of">of</span> <span word="an">an</span> <span word="unusual">unusual</span> <span word="combination">combination</span> <span word="of">of</span> <span word="sunny">sunny</span> <span word="days">days</span>, <span word="cloudless">cloudless</span> <span word="skies">skies</span> <span word="andwarm">andwarm</span> <span word="currents">currents</span> <span word="flowing">flowing</span> <span word="up">up</span> <span word="from">from</span> <span word="mid">mid</span>-<span word="latitudes">latitudes</span>.</p><p> 2007年的417万平方公里的最低记录是受到当时艳阳高照，万里无云的天空以及从中纬度上来的暖流这种异常组合的影响的产物。</p><p> <span word="This">This</span> <span word="year">year</span> <span word="has">has</span> <span word="seen">seen</span> <span word="no">no</span> <span word="such">such</span> <span word="opposite">opposite</span> <span word="of">of</span> <span word="a">a</span> <span word="perfect">perfect</span> <span word="storm">storm</span>, <span word="yet">yet</span> <span word="the">the</span> <span word="summer">summer</span> <span word="sea">sea</span>-<span word="ice">ice</span> <span word="minimum">minimum</span> <span word="is">is</span> <span word="amere">amere</span> 4% <span word="bigger">bigger</span> <span word="than">than</span> <span word="that">that</span> <span word="record">record</span>.</p><p> 而尽管并没有观测到如此不利的情况，今年海冰的极小值也仅仅比那年的记录大了4%。</p>
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