Operational ice charting at the Greenland Ice Service
Søren Andersen(1) , Rashpal S. Gill(1) , Keld Q. Hansen(1) , Rasmus T. Tonboe(1) , and Jacob L. Høyer(1)
2100 Copenhagen Ø,
Since 1959 the Danish Meteorological Institute (DMI) has operationally charted sea ice in the waters around Greenland. Until the late 1990'es sea ice charting was mainly based on aerial reconnaissance. Beginning 1997 the use of RADARSAT SCANSAR data was introduced and, besides resulting in more reliable ice charts, eliminated the need for airborne reconnaissance. In 2004 the Envisat ASAR data were introduced and are presently downlinked and transmitted in near real time to DMI from the receiving stations in Tromsø, Norway and Gatineau, Canada. In view of the age of RADARSAT-1, the DMI Ice Service has welcomed the increased reliability featured by the additional supply of Envisat ASAR data. However, the Ice Service has also investigated the possible use of the additional product types, such as alternating polarisation, featured by the ASAR sensor. The poster will present the operational workflow, including the combination of SAR data with other data sources, such as AMSR, SSM/I, Modis and AVHRR, as well as results of investigations into the use of the new ASAR modes.