Evaluation of simulated sea-ice concentrations from sea-ice/ocean models using satellite data and polynya classification methods

Polar research

Polona Rozman²  Ralph Timmermann²  Sascha Willmes³  Günther Heinemann³  David Schröder⁴  Susanne Adams⁵ 

[1] Centre for Polar Observation and Modelling, University College London Gower StreetWC1E 6BT London UK;Alfred Wegener Institute for Polar and Marine Research Bussestr. 24DE-27570 Bremerhaven Germany;Department of Environmental Meteorology, University of Trier Behringstr. 21DE-54286 Trier Germany;Department of Environmental Meteorology, University of Trier Behringstr. 21DE-54286 Trier Germany;Department of Environmental Meteorology, University of Trier Behringstr. 21DE-54286 Trier Germany Correspondence

关键词: Polynyas;    sea ice;    sea-ice/ocean models;    remote sensing;   

DOI  :  10.3402/polar.v30i0.7124

学科分类：自然科学（综合）

来源: Co-Action Publishing

【 摘 要 】

Sea-ice concentrations in the Laptev Sea simulated by the coupled North Atlantic–Arctic Ocean–Sea-Ice Model and Finite Element Sea-Ice Ocean Model are evaluated using sea-ice concentrations from Advanced Microwave Scanning Radiometer–Earth Observing System satellite data and a polynya classification method for winter 2007/08. While developed to simulate large-scale sea-ice conditions, both models are analysed here in terms of polynya simulation. The main modification of both models in this study is the implementation of a landfast-ice mask. Simulated sea-ice fields from different model runs are compared with emphasis placed on the impact of this prescribed landfast-ice mask. We demonstrate that sea-ice models are not able to simulate flaw polynyas realistically when used without fast-ice description. Our investigations indicate that without landfast ice and with coarse horizontal resolution the models overestimate the fraction of open water in the polynya. This is not because a realistic polynya appears b...

【 授权许可】

CC BY-NC