Currently, the most reliable method to estimate the age of tuna is by examination of their otoliths or "ear bones"

NIWA run a computer model which simulates wave heights across the Canterbury continental shelf and along the coast.

NIWA makes available and regularly updates results from several greenhouse gas measurement projects.

Dataset available for download

Plots of UV levels throughout the day at different locations.

If you list all the historic rainfall totals for a particular month and for a specific location, rank these from lowest to highest, then divide the list into ten equal parts, you have identified the ten rainfall deciles for that month and for that location.

Scott Base, Antarctica Antarctica is the coldest, windiest and driest continent.

A handful of species we work on

Northland, with its northern location, low elevation and close proximity to the sea is characterised by a mild, humid, and rather windy climate.

Water take (also known as water abstraction) has a range of valuable public and private uses.