Climate laboratory Holt

Climate laboratory Holt, Tromsø, offers excellent facilities for controlled growth experiments. Climate laboratory is jointly maintained by the Institute of Arctic and Marine Biology, the Arctic University of Norway (UiT) and NIBIO. With the location of 69° 39’N, Climate laboratory at Tromsø represents the northernmost facility for studying the artic climate in controlled conditions.



Climate laboratory has 6 day light and 4 dark phytotrons for the experimental use. The temperature of the day light phytotrons can be adjusted from 6 °C to 27 °C and the dark rooms from 0.5 to 27 °C. In phytotrones, air humidity, light intensity, quality and photoperiod and CO2 level, to some extent, can be adjusted. In the experiments, also soil composition and water and nutrition supply can be controlled.


Temperature in light and dark rooms is regulated with ± 0.5°C accuracy, with automatic control in change between the day and night temperatures. Only 3°C changes in the adjusted temperatures cause an alarm. The air humidity can be adjusted 10% of the relative humidity with the steady saturation system.


Other facilities

Climate laboratory has also additional greenhouse for growing and maintaining research plants, the facilities for sample preparation, storage and basic equipment for the analytical and molecular biological laboratory work.


The research activities

The users of the phytotrons are mainly researchers, students and the collaborators of the researchers at the UiT and the NIBIO. The applications for the research activities at the Climate laboratory should be sent in December for the upcoming year.



Contact persons:

Laura Jaakola

Leidulf Lund