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(Article of periodic en Anglais - 2013)

Document title

The influence of topography and approach angles on local deflections of airflow within a coastal blowout

Authors(s) and Affiliation(s)

PEASE P. (1) ; GARES P. (2) ;
(1) Dept. of Geography, Univ. of Northern Iowa, Cedar Falls, ETATS-UNIS
(2) Dept. of Geography, East Carolina Univ., Greenville, ETATS-UNIS

Abstract

This study examines the spatial variability of the wind field in a linear blowout in coastal dunes at Jockey's Ridge State Park, on the Outer Banks of North Carolina. A spatial array of single-height anemometers and wind vanes were placed within the blowout. Topography exerted a significant steering effect when onshore winds approached from directions within 50° of the blowout axis. When prevailing winds approached from directions more oblique than 50° to the blowout axis, topographic steering through the blowout trough was reduced and secondary flow generated by flow separation over the trough became more prominent. During those approach angles, wind directions and speeds within the upper blowout trough became erratic as vortices and turbulence dominated the flow, minimizing transport potential. The changing characteristics of airflow in the blowout relative to differing approach angles has implications on dune development and variations in transport potential under changing conditions

Source

Article of periodic

published at : Earth surface processes and landforms / ISSN 0197-9337 / CODEN ESPLDB

Editor : Wiley, Chichester - ROYAUME-UNI (1981)

Millesime : 2013, vol. 38, no10 [pp. 1160-1169]

Bibliographic references : 1 p.

Collation : 10 fig., 2 tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 17355

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/esp.3407

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2014
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