The National Snow and ice Data Centre tracks the Arctic ice-shelf using tools developed by NASA, and has produced monthly satellite maps going back to 1979.
美国冰雪数据中心(National SnowandIce Data Centre)使用NASA开发的工具跟踪观察北冰洋的冰架，并从1979年以来每个月都制作卫星地图。
The monthly SST data set from the National Climate data Centre U.
本文所用的月海温资料是取自美国国家气候中心。
Dr Lawrence and researchers at National Snow and ice Data Centre used computer models to analyse how the loss of sea ice could influence rising air temperatures and the melting of permafrost.
劳伦斯和美国国家冰雪数据中心的研究人员利用计算机模型分析了海冰的缩减对气温上升和永久冻结带融化的影响。
ON SEPTEMBER 9th, at the height of its summertime shrinkage, ice covered 4.33m square km, or 1.67m square miles, of the Arctic Ocean, according to America's National Snow and Ice Data Centre (NSIDC).
据美国国家冰雪中心（NSIDC）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。
ON SEPTEMBER 9th, at the height of its summertime shrinkage, ice covered 4.33m square km, or 1.67m square miles, of the Arctic Ocean, according to America's National Snow and Ice Data Centre (NSIDC).
据美国国家冰雪中心（NSIDC）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。
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