For understanding nitrobenzene distribution in water under natural ice in Songhua river, nitrobenzene contents of different ice layers of main riverway were examined at Dalianghe in Songhua river.

同时对松花江达连河断面主河道上冰层中硝基苯含量进行了分层检测。

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This may have deformed the lower ice, disrupting its annual layers and thereby causing the discrepancy between the records.

这可能会使低层冰变形，破坏其年层，从而造成记录之间的差异。

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As geologists mapped glacial deposits in the late nineteenth century, they became aware that there were several layers of drift, the lower ones corresponding to earlier ice ages.

19世纪晚期，在地质学家对这些冰川沉积进行定位的时候，他们意识到有好几个漂流层，位置较低的对应的是更早的冰川期。

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The climate record -- stretching back more than 750, 000 years -- can be read in the sediments and ice layers from Asia to Greenland.

CNN: Past may hold clues to climate's future

The radar sends radio wave pulses into the ice sheet, and the waves bounce off buried features, informing researchers about the characteristics of the snow and ice layers.

ENGADGET: NASA's GROVER eco-rover to examine Greenland's ice sheet (video)

According to Oskal, Finnmark is the area of Norway that is predicted to experience the largest temperature increases, raising concerns about whether ice layers will form over pastures preventing reindeer from foraging.

CNN: Snow maps from space aid reindeer herders