Atmospheric analysis

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)

Accurate reporting on the amount of fish and invertebrates that are caught and discarded by New Zealand’s commercial fishing industry is vital to effective management of these fisheries.

This manual prescribes a set of sampling and analysis protocols applicable to most of the common stream habitats in New Zealand.

The Kiwi dream of owning a beachfront property with panoramic views of the ocean is under threat—and not just for financial reasons.

A high proportion of New Zealand’s native freshwater fish fauna need to migrate to and from the sea.

Station height is in metres above mean sea level. Years of data are the number of complete years of data for the 1981 – 2010 period.

Mountainous areas are subject to heavy snowfalls, high winds, and low temperatures. Semi-permanent snow and ice fields exist at about 1000-1100 metres during winter.

Once in freshwater, glass eels develop into darker pigmented juvenile eels known as elvers.

A carbon neutral activity is one that has a carbon footprint of zero.

Tuna or freshwater eels are a very significant, widely-valued, heavily-exploited, culturally iconic mahinga kai resource.