The impact of a thermodynamic sea-ice module in the COSMO numerical weather prediction model on simulations for the Laptev Sea, Siberian Arctic
| Title: | The impact of a thermodynamic sea-ice module in the COSMO numerical weather prediction model on simulations for the Laptev Sea, Siberian Arctic |
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| Authors: | David Schröder, Günther Heinemann, Sascha Willmes |
| Source: | Polar Research, Vol 30, Iss 0, Pp 1-18 (2011) |
| Publisher Information: | Norwegian Polar Institute, 2011. |
| Publication Year: | 2011 |
| Collection: | LCC:Environmental sciences LCC:Oceanography |
| Subject Terms: | Laptev Sea, polynya, mesoscale modelling, Environmental sciences, GE1-350, Oceanography, GC1-1581 |
| More Details: | Previous versions of the Consortium for Small-scale Modelling (COSMO) numerical weather prediction model have used a constant sea-ice surface temperature, but observations show a high degree of variability on sub-daily timescales. To account for this, we have implemented a thermodynamic sea-ice module in COSMO and performed simulations at a resolution of 15 km and 5 km for the Laptev Sea area in April 2008. Temporal and spatial variability of surface and 2-m air temperature are verified by four automatic weather stations deployed along the edge of the western New Siberian polynya during the Transdrift XIII-2 expedition and by surface temperature charts derived from Moderate Resolution Imaging Spectroradiometer (MODIS) satellite data. A remarkable agreement between the new model results and these observations demonstrates that the implemented sea-ice module can be applied for short-range simulations. Prescribing the polynya areas daily, our COSMO simulations provide a high-resolution and high-quality atmospheric data set for the Laptev Sea for the period 14–30 April 2008. Based on this data set, we derive a mean total sea-ice production rate of 0.53 km3/day for all Laptev Sea polynyas under the assumption that the polynyas are ice-free and a rate of 0.30 km3/day if a 10-cm-thin ice layer is assumed. Our results indicate that ice production in Laptev Sea polynyas has been overestimated in previous studies. |
| Document Type: | article |
| File Description: | electronic resource |
| Language: | English |
| ISSN: | 0800-0395 1751-8369 |
| Relation: | http://www.polarresearch.net/index.php/polar/article/view/6334/pdf_93; https://doaj.org/toc/0800-0395; https://doaj.org/toc/1751-8369 |
| DOI: | 10.3402/polar.v30i0.6334 |
| Access URL: | https://doaj.org/article/4fb3986d93a24a10925c1da415440692 |
| Accession Number: | edsdoj.4fb3986d93a24a10925c1da415440692 |
| Database: | Directory of Open Access Journals |
| ISSN: | 08000395 17518369 |
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| DOI: | 10.3402/polar.v30i0.6334 |
| Published in: | Polar Research |
| Language: | English |