Atmos. Chem. Phys. Discuss., 13, 24785-24807, 2013
www.atmos-chem-phys-discuss.net/13/24785/2013/
doi:10.5194/acpd-13-24785-2013
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This discussion paper has been under review for the journal Atmospheric Chemistry and Physics (ACP). Please refer to the corresponding final paper in ACP.
A case study of sea breeze blocking regulated by sea surface temperature along the English south coast
J. K. Sweeney1, J. M. Chagnon2, and S. L. Gray1
1Department of Meteorology, University of Reading, Reading, Berkshire RG6 6BB, UK
2National Centre for Atmospheric Science, University of Reading, Reading, Berkshire RG6 6BB, UK

Abstract. The sensitivity of sea breeze structure to sea surface temperature (SST) and coastal orography is investigated in convection-permitting Met Office Unified Model simulations of a case study along the south coast of England. Changes in SST of 1 K are shown to significantly modify the structure of the sea breeze. On the day of the case study the sea breeze was partially blocked by coastal orography, particularly within Lyme Bay. The extent to which the flow is blocked depends strongly on the static stability of the marine boundary layer. In experiments with colder SST, the marine boundary layer is more stable, and the degree of blocking is more pronounced. The implications of prescribing fixed SST from climatology in numerical weather prediction model forecasts of the sea breeze are discussed.

Citation: Sweeney, J. K., Chagnon, J. M., and Gray, S. L.: A case study of sea breeze blocking regulated by sea surface temperature along the English south coast, Atmos. Chem. Phys. Discuss., 13, 24785-24807, doi:10.5194/acpd-13-24785-2013, 2013.
 
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