Sea Ice Temperature
The figure shows the mean temperature of the sea ice and the surface of the sea based on satellite observations during the past 36 hours.
The surface temperature of the ice has a great influence on the exchange of heat between the surface and the atmosphere, and thereby also the rate of increase of the sea ice volume.
Surface temperature is important
In order to be able to forecast the weather and the properties of the sea ice using numerical models, it is crucial that the surface temperature is determined correctly.
Data from satellites is the primary source of information because the Arctic suffers from poor coverage in terms of the conventional observational network, which consists of drifting buoys and a number of land-based stations.
At DMI, the temperature of the surface is not measured directly. Instead, observations are used from three infrared channels on the “Advanced Very High Resolution Radiometer” (AVHRR), which is on board the MetOp-A satellite. The instrument is unable to see through clouds, however. A statistical method is therefore used to provide the missing data. The edge of the ice is shown as a black contour line. It is defined by a sea ice concentration of 15%, i.e. 15% of the surface is covered by ice.
This integreted Ice and Sea surface temperature product is part of the EU satellite monitoring program for marine environment, Copernicus CMEMS. The product is based on the OSI-205 product from EUMETSAT Ocean and Sea Ice Satellite Application Facility (EUMETSAT, OSI SAF). The figure shows the latest 36-hour sliding mean temperature of the ice- and ocean surface.