The atmosphere is comprised of layers based on temperature. These layers are the troposphere, stratosphere, mesosphere and thermosphere.

How do nutrients from wastewater treatment enter waterways?

Tairua station

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.

A summary of up-coming tropical cyclone seasons, issued 6-monthly.

Dairy farms operate to maximise milk production

How can mining activities influence sediments in waterways?

Tornadoes, like the one that hit Auckland's western suburbs today, are relatively rare events in New Zealand.

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

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

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