THE PLANETARY BOUNDARY LAYER WIND OVER CHRISTMAS ISLAND

MARIANO A. ESTOQUE Rosenstiel School of Marine and Atmospheric Sciences, University of Miami, Coral Gables, Fla.

Search for other papers by MARIANO A. ESTOQUE in
Current site
Google Scholar
PubMed
Close
Full access

Abstract

Wind observations in the planetary boundary layer over an atoll near the Equator were made using the double-theodolite pilot balloon method. The observed mean wind profile is representative of boundary layer flow over a homogeneous surface with a very low value of the Coriolis parameter. The wind is predominantly easterly with a small backing with height. Analysis of the wind profile suggests that the component of motion along east-west direction is approximately geostrophic; however, the component along the north-south direction is highly nongeostrophic. The analysis also indicates that the change in the wind direction with height is controlled mainly by the height variation of the horizontal pressure gradient.

Abstract

Wind observations in the planetary boundary layer over an atoll near the Equator were made using the double-theodolite pilot balloon method. The observed mean wind profile is representative of boundary layer flow over a homogeneous surface with a very low value of the Coriolis parameter. The wind is predominantly easterly with a small backing with height. Analysis of the wind profile suggests that the component of motion along east-west direction is approximately geostrophic; however, the component along the north-south direction is highly nongeostrophic. The analysis also indicates that the change in the wind direction with height is controlled mainly by the height variation of the horizontal pressure gradient.

Save