On 1 July 2025, NIWA merged with GNS Science to become Earth Sciences New Zealand.

Sensors on the eddy covariance tower measure wind speed and direction, temperature, humidity and CO2 transfer

Dave Allen

Sensors on the eddy covariance tower measure wind speed and direction, temperature, humidity and CO2 transfer – factors that determine how much water is lost via evapotranspiration. Photo taken on Craig Mackenzie's farm near Methven, Canterbury. NIWA Hydrologist MS Srivinasan is pictured.