Atmospheric analysis

Each waterway has its own particular characteristics relating to water flow, velocity, and quantity.

These datasets are available in a range of formats.

New Zealand has just experienced its warmest winter on record, according to official NIWA climate data.

NIWA scientists have made the rare discovery of a days-old ghost shark during a recent survey off the east coast of the South Island.

The 3-panel Soil Moisture Deficit (SMD) map shows the historical soil moisture deficit at the date shown (left), the soil moisture deficit at the same time last year (middle) and the current soil moisture deficit (right).

The UV Index is a measure of the intensity of UV radiation. The UV Index supersedes the idea of "Time to Burn" or "Burn Time", which has been used previously in New Zealand.

This national GIS ‘layer’ enables reconnaissance-scale estimation of suspended-sediment yields from New Zealand’s rivers and streams. It has been developed by NIWA in collaboration with Landcare Research.

Estuaries are at the bottom of the freshwater drainage network and, effectively, are a part of it.

There are two species of kōura or freshwater crayfish in Aotearoa.

Waterways can easily become contaminated by pathogens when effluent is discharged nearby.

The New Zealand Palaeotsunami Database (Database) brings together all known information about tsunamis that occurred prior to written records.