University of Bremen

Institute of Environmental Physics
P.O. Box 330440,   D-28334 Bremen (letters)
Otto-Hahn-Allee 1, D-28359 Bremen (parcels + office)

Arctic ROOS contact person:

Dr. Georg Heygster
E-mail: heygster@uni-bremen.de

Phone: +49 (0)421 218-3910, -4274, fax -4555

UB calculates daily in near real time wordwide sea ice concentrations, based on data of the passive microwave imager ASMR2 (Advanced Scanning

Microwave Radiometer on EOS) on the NASA spacecraft Aqua. Using the highest frequency (85 GHz) channels (v and h pol) and the ASI (Artist Sea Ice) concentration algorithm, allows to present the highest resolving ice concentration maps which are currently daily and globally available.

Each day, 2 hemispherical maps are provided in a 6.25 km grid and 20 regional maps in a 3.125 km grid. The maps are updated twice per day around 0300 UTC (complete data of day before) and 1600 UTC (current day, sometimes not yet full coverage). All maps are available in two color scales, visual and NIC.

As a backup service, also SSM/I-based ice concentration maps at lower resolution are presented.

The maps are provided within the framework of the GMES initiative Polar View.

Maps of the Arctic sea ice concentrations of the complete Arctic (left), and of the Svalbard region (right).

These maps are automatically updated each day. See