Arctic sea-ice cover reached its lowest ever recorded average level for the month of June.
六月，北极海冰的覆盖面积达到历史平均记录的最低点。
The Arctic sea ice holds a central position in the Earth's climate system and it's deteriorating faster than expected.
北极海冰在地球气候系统中占据中心位置，并且它恶化的速度比预期的更快。
Arctic sea ice usually melts in spring and summer, then grows in winter.
北极的海冰通常在春天和夏天融化，然后在冬天形成。
The animals were forced to swim to shore after the Arctic Sea ice they usually live on disappeared from the Chukchi Sea.
楚科奇海面上它们赖以生存的北极冰面消失后，这些动物无奈中只能上岸。
In their model simulations, they artificially removed all Arctic sea ice at the beginning of June for selected years and examined if the ice would recover from such extreme event.
在模拟过程中，他们人为地把特定年份中六月初的所有北极海冰都转移走，观测冰层是否会在那样一场极限事件之后恢复。
The computer models used to project future warming, for example, seem to be too conservative: they failed to predict, among other things, the rapid collapse of summertime Arctic sea ice since 2007.
比如说，用来预测未来暖化的计算机模型似乎太过于保守了：例如，它们没有预测到2007年以来北冰洋夏季时间里冰量的急剧减少。
Measures of Arctic sea ice this year show its area is the second lowest on record, and its volume is the lowest.
对北极海冰的检测表明，今年海冰面积下降到记录以来倒数第二，其体积则已经减少到有记录以来最小。
"Climate change is accelerating beyond expectations," a joint statement said, pointing to factors including a retreat of Arctic sea ice in summer and melting of ice sheets on Greenland and Antarctica.
专家们在一份联合声明中称，“气候变化的加速度已经超过预期”，并指出包括北冰洋夏季冰面减少，以及格陵兰岛和南极冰床融化等状况。
The trend also helped to melt Arctic sea ice cover to a record low for December last month, the WMO said in a statement.
世界气象组织称，这个趋势使北冰洋的冰雪覆盖面于上个月十二月份达到历史最低。
The Arctic sea ice extent averaged for July was the second lowest in the satellite record, after 2007, to the latest figures from the National Snow and Ice Data Center (NSIDC).
根据来自国家冰雪数据中心（NSIDC）的最新数字，7月份平均北极海冰面积为2007年后卫星纪录中第2个最低点。
As Arctic sea ice melts, the darker ocean absorbs more sunlight and speeds melting.
覆盖在北极海面上的冰雪融化后，颜色更深的海水将吸收更多的阳光，从而加速了融化进程。
New research has revealed that melt-water pooling on the Arctic sea ice is causing it to melt at a faster rate than computer models had previously predicted.
新的研究表明：北极海冰的熔化速度超过了预期而这应归咎于熔体池。
They show Arctic sea ice extent for the September 2009 minimum (left) and March 2010 maximum (right).
它显示的是北极海洋结冰程度在2009年9月的最低值(左)和2010年3月的最高值(右)。
They do not have a set migration pattern, unlike some other whale species - which raises questions about how they may adapt in future, if the projected declines in summer Arctic sea ice materialise.
它们没有一套迁徙的模式，不像其他的鲸类——假如夏季北极海冰像预计那样减少而成为现实的话，这就引起了关于它们如何适应未来的问题。
She and other scientists are researching whether there might be a 'tipping point' for Arctic sea ice -a point at which sea ice will disappear and never recover, even if the climate cools.
她与同事致力于研究对于北冰洋上的海冰是否存在一个不可逆转的“消融点”，一旦达到该点即使气候转凉海冰也无法恢复原来的覆盖量。
As a result, sea ice extent for the Arctic actually peaked on March 31, 2010-the latest peak of wintertime Arctic sea ice extent in the satellite record.
结果导致2010年北极的海冰范围是在3月31日达到峰值——这是有卫星记录以来北极海冰范围最晚的冬季峰值。
He also argued that much remains unknown about the interaction between Arctic sea ice, sea level, and temperature rise.
他还认为，有关北极海冰、海平面图和气温上升之间的相互作用还存在许多未知数。
The Arctic sea ice is shrinking so fast that within the next few decades, if not years, it could be completely gone in summertime.
北极的海冰正在飞速消融，照此速度，在今后几十年里，可能就在某一个盛夏时节，它们将完全融化。
Data from submarines suggest that Arctic sea ice has thinned by 40 percent in the past 30 years.
从潜艇所获得的数据表明，北极海的冰层在过去30年里变薄了40%。
If there were such a thing, now would not be a good time to buy shares in Arctic sea ice.
假设北极冰川真出现了这样的情况，那么现在一定不是个买股票的好时机。
And retreating Arctic sea ice provides even more visible data to support conclusions of warming.
而北冰洋冰块的后退为变暖的结论提供了更明显的数据支持。
Arctic sea ice is melting far faster than climate models predict.
北冰洋的冰，融化速度比气候模型预测的快很多。
Such widespread loss of Arctic sea ice has sometimes given rise to the concern that the total loss of Arctic sea ice at least during summer time can no longer be avoided.
人们为如此大范围的北极海冰流失日渐忧心：北极海冰的完全流失似乎已经无法避免了，至少在夏季是这样。
There's too little data to know—comprehensive records on Arctic sea ice go back only to 1979.
人们获知的数据太少：有关北极冰川的综合记录只能追溯到1979年。
We've seen it in temperature, and increases in atmospheric humidity, we've seen it in salinity changes. We've seen it in reductions in Arctic sea ice and changing rainfall patterns," Dr Stott said.
在气温、气湿增加、盐度变高、北极冰山减少和雨林模式变化中都发现了人类的痕迹，” 斯托特博士说，“我们观察到的结果和现实严峻的形式一致。
We've seen it in temperature, and increases in atmospheric humidity, we've seen it in salinity changes. We've seen it in reductions in Arctic sea ice and changing rainfall patterns, " Dr Stott said.
在气温、气湿增加、盐度变高、北极冰山减少和雨林模式变化中都发现了人类的痕迹，” 斯托特博士说，“我们观察到的结果和现实严峻的形式一致。
We've seen it in temperature, and increases in atmospheric humidity, we've seen it in salinity changes. We've seen it in reductions in Arctic sea ice and changing rainfall patterns, " Dr Stott said.
在气温、气湿增加、盐度变高、北极冰山减少和雨林模式变化中都发现了人类的痕迹，” 斯托特博士说，“我们观察到的结果和现实严峻的形式一致。
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