Title :
Sea ice concentration in response to weather systems in the Weddell Sea: comparison between SSM/I data and model simulations
Author :
Fischer, Holger ; Oelke, Christoph
Author_Institution :
Alfred Wegener Inst. for Polar & Marine Res., Bremerhaven, Germany
Abstract :
This study compares sea ice concentrations derived from Special Sensor Microwave/Imager (SSM/I) data with results from a dynamic-thermodynamic sea ice model forced by daily means of air temperature and wind. The analyses focus on two regions with different ice characteristics and concentrations in the eastern and western Weddell Sea (Antarctica) for the austral winter period June to July 1992. Additional synoptic observations, surface and radiosonde measurements from a R.V. Polarstern cruise are used for validation. Fluctuations of wind and air temperature are found to be equally important for rapid changes of sea ice concentrations on a daily time scale. The typical reduction of SSM/I-derived sea ice concentration is in the range of 5-10% for transient cyclones, but simulated ice concentrations are reduced by 5%
Keywords :
oceanographic regions; sea ice; AD 1992 06; AD 1992 07; SSM/I; Southern Ocean; Special Sensor Microwave/Imager; Weddell Sea; air sea interaction; atmosphere; austral winter; meteorology; microwave radiometry; model; model simulation; ocean; remote sensing observations; sea ice concentration; temperature; transient cyclone; weather system response; wind; Antarctica; Image sensors; Microwave sensors; Ocean temperature; Sea ice; Sea measurements; Sea surface; Sensor phenomena and characterization; Temperature sensors; Wind;
Conference_Titel :
Geoscience and Remote Sensing, 1997. IGARSS '97. Remote Sensing - A Scientific Vision for Sustainable Development., 1997 IEEE International
Print_ISBN :
0-7803-3836-7
DOI :
10.1109/IGARSS.1997.609024
