Kōrero: Climate change

Ice-core drilling

Ice-core drilling

Glaciers hold information about past climatic and environmental change. As snow accumulates, layer upon layer, year after year, it gradually turns to ice. The deepest part of the ice in glaciers and ice sheets may have fallen as snow thousands of years ago, and the particles locked in it form a record of earth's atmosphere at the time. In addition to trapping compounds from the air, ice sheets trap a small sample of the air itself, providing information about the composition of the atmosphere at the time the ice formed. These scientists are drilling core samples in Antarctica.

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GNS Science
Photograph by Tim Naish

Permission of GNS Science must be obtained before any use of this image.

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Te tuhi tohutoro mō tēnei whārangi:

Brett Mullan and Kynan Gentry, 'Climate change - Past climate', Te Ara - the Encyclopedia of New Zealand, http://www.TeAra.govt.nz/mi/photograph/7545/ice-core-drilling (accessed 10 July 2020)

He kōrero nā Brett Mullan and Kynan Gentry, i tāngia i te 12 Jun 2006