Assimilation of high-resolution ice charts in a coupled ocean-sea-ice model

• Published in: IGARSS 2019 - 2019 IEEE International Geoscience and Remote Sensing Symposium
• Main Authors: Fritzner, Sindre Markus, Christensen, Kai Håkon, Graversen, Rune, Wang, Keguang
• Format: Article in Journal/Newspaper
• Language: English
• Published: 2019
• Subjects: Sea ice
• Online Access: https://hdl.handle.net/10037/31502; https://doi.org/10.1109/IGARSS.2019.8898221

In this study, we show assimilation results from a coupled ocean sea-ice model. The model has a horizontal resolution of 2.5 km. In the assimilation system, we assimilate high-resolution ice charts, structured on a 1 km grid. We compare the assimilation of passive microwave observations with the assimilation of ice charts. It is shown that the ice charts have a larger impact on the assimilation system than the passive microwave observations. In addition, a few results from the assimilation system with ice charts are shown. These indicate improvements for the assimilation system assimilating ice charts compared to a free-run without assimilation and an assimilation system assimilating passive microwave observations.