Kōrero: Climate change

Sediment cores

Sediment cores

Cores (samples) from sediment on the sea floor can provide information about past climate. Unlike ice cores, which supply direct information, sediment cores give indirect evidence. For example, to determine temperature, scientists painstakingly pick out and count plankton shells, which twist in different directions depending on the temperature of the water they grew in.

Te whakamahi i tēnei tūemi

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/7546/sediment-cores (accessed 5 July 2020)

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