Orographic disturbances of surface winds over the shelf waters adjacent to South Georgia

Hosking, J. Scott ORCID: https://orcid.org/0000-0002-3646-3504; Bannister, Daniel; Orr, Andrew ORCID: https://orcid.org/0000-0001-5111-8402; King, John ORCID: https://orcid.org/0000-0003-3315-7568; Young, Emma ORCID: https://orcid.org/0000-0002-7069-6109; Phillips, Tony ORCID: https://orcid.org/0000-0002-3058-9157. 2015 Orographic disturbances of surface winds over the shelf waters adjacent to South Georgia. Atmospheric Science Letters, 16 (1). 50-55. https://doi.org/10.1002/asl2.519

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Official URL: http://dx.doi.org/10.1002/asl2.519

Abstract/Summary

This study seeks to quantify the influence of South Georgia's orography on regional surface winds. A typical case study characterized by large-scale westerly winds is analysed using a high-resolution setup (3.3 km) of the Weather Research and Forecasting (WRF) regional model. The simulation produces significant fine-scale spatial variability which is in agreement with satellite-derived winds. The model simulation indicates that these orography-driven wind disturbances are responsible for strong wind stress curl and enhanced heat flux over the shelf waters surrounding South Georgia. Such surface forcing is entirely absent from the reanalysis, highlighting the need to use high-resolution forcing in regional ocean model simulations

Item Type:	Publication - Article
Digital Object Identifier (DOI):	https://doi.org/10.1002/asl2.519
Programmes:	BAS Programmes > Polar Science for Planet Earth (2009 - ) > Climate
ISSN:	1530261X
Additional Keywords:	orographic disturbances, regional modelling, South Georgia, surface heat fluxes, wind stress curl, WRF
Date made live:	29 Jul 2014 10:29 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/507946

Item Type:

Publication - Article

Digital Object Identifier (DOI):

https://doi.org/10.1002/asl2.519

Programmes:

BAS Programmes > Polar Science for Planet Earth (2009 - ) > Climate

ISSN:

1530261X

Additional Keywords:

orographic disturbances, regional modelling, South Georgia, surface heat fluxes, wind stress curl, WRF

Date made live:

29 Jul 2014 10:29 +0 (UTC)