Evaluation of simulated sea-ice concentrations from sea-ice/ocean models using satellite data and polynya classification methods
| Title: | Evaluation of simulated sea-ice concentrations from sea-ice/ocean models using satellite data and polynya classification methods |
|---|---|
| Authors: | Susanne Adams, Sascha Willmes, Günther Heinemann, Polona Rozman, Ralph Timmermann, David Schröder |
| Source: | Polar Research, Vol 30, Iss 0, Pp 1-17 (2011) |
| Publisher Information: | Norwegian Polar Institute, 2011. |
| Publication Year: | 2011 |
| Collection: | LCC:Environmental sciences LCC:Oceanography |
| Subject Terms: | Polynyas, sea ice, sea-ice/ocean models, remote sensing, Environmental sciences, GE1-350, Oceanography, GC1-1581 |
| More Details: | 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 but due to a larger-scale reduction of ice concentrations and smoothed ice-concentration fields. After implementation of a landfast-ice mask, the polynya location is realistically simulated but the total open-water area is still overestimated in most cases. The study shows that the fast-ice parameterization is essential for model improvements. However, further improvements are necessary in order to progress from the simulation of large-scale features in the Arctic towards a more detailed simulation of smaller-scaled features (here polynyas) in an Arctic shelf sea. |
| Document Type: | article |
| File Description: | electronic resource |
| Language: | English |
| ISSN: | 0800-0395 1751-8369 |
| Relation: | http://www.polarresearch.net/index.php/polar/article/view/7124/pdf_134; https://doaj.org/toc/0800-0395; https://doaj.org/toc/1751-8369 |
| DOI: | 10.3402/polar.v30i0.7124 |
| Access URL: | https://doaj.org/article/d679b33cc0ee4e089548c0712484e35d |
| Accession Number: | edsdoj.679b33cc0ee4e089548c0712484e35d |
| Database: | Directory of Open Access Journals |
| ISSN: | 08000395 17518369 |
|---|---|
| DOI: | 10.3402/polar.v30i0.7124 |
| Published in: | Polar Research |
| Language: | English |