The scientists will be measuring water temperature, the sea floor and ice thickness.

科学家们将测量水温、海底和冰的厚度。

And recent research shows that since 1958, the sea ice thickness has decreased by two-thirds.

而最近的研究表明，自 1958 年以来，海冰厚度减少了三分之二。

And thanks to the Russian data exchange, we learned that the average ice thickness in the Arctic declined by almost half in 28 years.

多亏了俄罗斯的数据交换，我们了解到北极的平均冰厚度在 28 年内下降了近一半。