Kōrero: Open ocean

Seasonal changes in ocean temperature, south-eastern New Zealand

Seasonal changes in ocean temperature, south-eastern New Zealand

Life in the ocean depends on the mixing of warm upper layers with cooler lower layers in autumn and winter. This recharges surface water with the nutrients essential for phytoplankton growth. The diagram illustrates the changes in ocean temperature at increasing depths. During summer (December) there is a thin layer of warm water above the nutrient-rich cool water. As autumn progresses (May) the warm water begins to mix with the cooler water. By the end of winter (September), the nutrients have reached the surface. The cycle starts again when summer heat warms up surface waters.

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Te Ara - The Encyclopedia of New Zealand

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Source: NIWA – National Institute of Water and Atmospheric Research

Ngā whakaahua me ngā rauemi katoa o tēnei kōrero

Te tuhi tohutoro mō tēnei whārangi:

Janet Grieve, 'Open ocean - Fish larvae and the ocean environment', Te Ara - the Encyclopedia of New Zealand, http://www.TeAra.govt.nz/mi/diagram/5362/seasonal-changes-in-ocean-temperature-south-eastern-new-zealand (accessed 9 August 2020)

He kōrero nā Janet Grieve, i tāngia i te 12 Jun 2006