How may agricultural activities impact riparian vegetation around a waterway?

Sheltered by high country to the west, the eastern zone of the North Island enjoys a dry, sunny climate.

Generally speaking, a drought is defined as a rainfall deficit which restricts or prevents a human activity – for example, farming or power generation.

PPM and PPB are units used in atmospheric chemistry to describe the concentration of gases.

Data from our research which we make publicly available.

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

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

Information about past climate is obtained from piecing evidence together from various sources.

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

Temperature affects the number and type of animals and plants that live in a waterway.