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Boundary-Layer Meteorology

, Volume 158, Issue 1, pp 139–150 | Cite as

Sea-Breeze and Topographic Influences on the Planetary Boundary Layer in the Coastal Upwelling Area of Cabo Frio (Brazil)

  • F. N. D. Ribeiro
  • J. SoaresEmail author
  • A. P. Oliveira
Notes and comments

Abstract

We use a fully coupled oceanic-atmospheric model to investigate the sources and sinks of turbulent kinetic energy in the Cabo Frio coastal area and to determine the role of topography and the sea breeze in planetary boundary-layer (PBL) development. The study area presents similar boundary-layer characteristics than other coastal upwelling areas with complex topography, such as increased stability and low-level jets. The results show that the major effect of upwelling, over the investigated area, is to maintain low temperatures in the lower atmosphere over the coastal zone, sustaining a strong temperature inversion that precludes the vertical PBL development. Therefore, the cooling effect reduces the horizontal thermal contrast between land and water, generating a negative feedback between the intensity of the sea breeze and the intensity of the upwelling. The topography at Cabo Frio prevents this cooling effect from propagating inland, since it limits the penetration of the sea-breeze circulation.

Keywords

Coastal upwelling Planetary boundary layer Sea breeze Topography Turbulent fluxes 

Notes

Acknowledgments

The authors acknowledge the financial support provided by the Brazilian Research Agency CNPq (Grants 142007/2005-6, 305357/2012-3, and 309079/2013-6) and the support of the University of São Paulo.

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Copyright information

© Springer Science+Business Media Dordrecht 2015

Authors and Affiliations

  1. 1.University of São PauloSão PauloBrazil

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