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The atmospheric boundary layer structure over the open and ice-covered Baltic Sea: in situ measurements compared to simulations with the regional model REMO

Brümmer, Burghard; Kirchgaessner, Amelie; Müller, Gerd. 2014 The atmospheric boundary layer structure over the open and ice-covered Baltic Sea: in situ measurements compared to simulations with the regional model REMO. Theoretical and Applied Climatology, 118 (4). 641-653. 10.1007/s00704-009-0177-y

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This article has been accepted for publication and will be published by Springer in Theoretical and Applied Climatology. The final publication is available at link.springer.com. Copyright Springer.
ABL structure 3.3.2008.pdf - Accepted Version

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Abstract/Summary

The regional model REMO, which is the atmospheric component of the coupled atmosphere–ice–ocean–land climate model system BALTIMOS, is tested with respect to its ability to simulate the atmospheric boundary layer over the open and ice-covered Baltic Sea. REMO simulations are compared to ship, radiosonde, and aircraft observations taken during eight field experiments. The main results of the comparisons are: (1) The sharpness and strength of the temperature inversion are underestimated by REMO. Over open water, this is connected with an overestimation of cloud coverage and moisture content above the inversion. (2) The vertical temperature stratification in the lowest 200 m over sea ice is too stable. (3) The horizontal inhomogeneity of sea ice concentration as observed by aircraft could not be properly represented by the prescribed ice concentration in REMO; large differences in the surface heat fluxes arise especially under cold-air advection conditions. The results of the comparisons suggest a reconsideration of the parameterization of subgrid-scale vertical exchange both under unstable und stable conditions.

Item Type: Publication - Article
Digital Object Identifier (DOI): 10.1007/s00704-009-0177-y
Programmes: BAS Programmes > Polar Science for Planet Earth (2009 - ) > Climate
ISSN: 0177-798X
Date made live: 22 Dec 2014 09:22 +0 (UTC)
URI: http://nora.nerc.ac.uk/id/eprint/509148

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