Sea ice temperatures

Ice surface temperature  

The figure shows the latest 36-hour sliding mean temperature of the ice- and ocean surface.

The ice surface temperature strongly affects heat exchange between the surface and the atmosphere and the rate of ice growth. In order to properly forecast weather and sea ice conditions in numerical models, it is important to obtain accurate surface temperatures.

A sparsely distributed observational network, consisting of drifting buoys, cannot resolve the surface temperature variations in the Arctic sufficiently but satellite observations can fill in the gaps of the traditional observational network.

The DMI ice temperature product (IST) uses three thermal infrared channels from the Advanced Very High Resolution Radiometer (AVHRR) on board the Metop-A satellite to calculate the surface temperatures in the Arctic. The instrument cannot see through clouds and a statistical method is thus used to fill the areas without data. The ice edge (at 15% ice concentration) is shown in the plot as a black contour line.