The impact of a thermodynamic sea-ice module in the COSMO numerical weather prediction model on simulations for the Laptev Sea, Siberian Arctic

Polar research

Günther Heinemann¹  Sascha Willmes²  David Schröder² 

[1] Centre for Polar Observation and Modelling, University College London, Gower Street, WC1E 6BT London, UKCorrespondence;Department of Environmental Meteorology, University of Trier, Behringstr. 21, DE-54286 Trier, Germany

关键词: Laptev Sea;    polynya;    mesoscale modelling;   

DOI  :  10.3402/polar.v30i0.6334

学科分类：自然科学（综合）

来源: Co-Action Publishing

【 摘 要 】

AbstractPrevious 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-quali...

【 授权许可】

CC BY-NC