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

The mass of carbon emissions can easily be calculated.

NIWA makes a range of trace gas data freely available on our FTP site.

Plants and trees along the water margins and banks are called riparian vegetation.

View a collection of maps showing the impact of past El Niño and La Niña events.

Hydro-electricity is a renewable energy source that relies on the inflow of water into storage lakes upstream of a dam.

These datasets are available in a range of formats.

Tuna harvested from Lake Ōmāpere and Utakura River catchment have long comprised an important fishery for tangata whenua.

This project demonstrates how to assess high value alternative land-use options by means of a quantitative analysis of the growing potential of selected niche crops and tree species.

Piharau/kanakana are an important mahinga kai species and a prized delicacy for many Māori.