Atmospheric analysis

The climate of Otago is perhaps the most diverse of any region in New Zealand.

NIWA discusses, in depth, this year's most asked question—what is happening to our fresh waterways?

Longfin eels are the largest and longest-lived fish in New Zealand's freshwaters, and where they are present they are the top predator.

Dairy farms operate to maximise milk production

How can mining activities influence sediments in waterways?

Climate data and common terms explaining the causes and effects of climate change.

Atmospheric carbon dioxide (CO2) is measured continuously at Baring Head, providing the longest running record of this type in the Southern hemisphere.

This is the standard precision instrument NIWA uses throughout New Zealand in the National Climate Network, and elsewhere, for rainfall measurement.

Floods are not unusual in New Zealand, but those that hit us early this winter broke records. Why did they occur? Should we expect more? Can we predict future floods?

Learn how to use the New Zealand Freshwater Fish Database (NZFFD)