Effects of roll vortices on turbulent fluxes in the hurricane boundary layer

Jun A. Zhang, Kristina B. Katsaros, Peter G. Black, Susanne Lehner, Jeffrey R. French, William M Drennan

Research output: Contribution to journalArticle

50 Citations (Scopus)

Abstract

Boundary-layer secondary circulations or 'roll vortices' can have a significant influence on the turbulent exchange of momentum, sensible heat and moisture throughout the hurricane boundary layer. In this study, analyses of data from a WP-3D aircraft of the National Oceanic and Atmospheric Administration (NOAA) are presented. As part of the Coupled Boundary Layer Air-Sea Transfer (CBLAST)-hurricane experiment sponsored through the Office of Naval Research and NOAA's annual hurricane research program, flights were conducted to investigate energy exchange across the air-sea interface. We present the first in-situ aircraft-based observations of rolls in the hurricane boundary layer and investigate their influence on energy and momentum exchange. The rolls detected in Hurricane Isidore (year 2002) have a characteristic wavelength of about 900 m, in good agreement with analyses of data from a synthetic aperture radar image captured by the Canadian Space Agency's RADARSAT satellite in the same storm. Our analyses of the airborne data suggest that roll vortices may be a significant factor modulating the air-sea momentum exchange.

Original languageEnglish (US)
Pages (from-to)173-189
Number of pages17
JournalBoundary-Layer Meteorology
Volume128
Issue number2
DOIs
StatePublished - Aug 2008

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hurricane
vortex
boundary layer
momentum
aircraft
air
RADARSAT
research program
energy
synthetic aperture radar
flight
moisture
effect
wavelength
sea
experiment

Keywords

  • Air-sea interaction
  • Hurricane boundary layer
  • Roll vortices
  • Turbulent fluxes

ASJC Scopus subject areas

  • Atmospheric Science

Cite this

Effects of roll vortices on turbulent fluxes in the hurricane boundary layer. / Zhang, Jun A.; Katsaros, Kristina B.; Black, Peter G.; Lehner, Susanne; French, Jeffrey R.; Drennan, William M.

In: Boundary-Layer Meteorology, Vol. 128, No. 2, 08.2008, p. 173-189.

Research output: Contribution to journalArticle

Zhang, Jun A. ; Katsaros, Kristina B. ; Black, Peter G. ; Lehner, Susanne ; French, Jeffrey R. ; Drennan, William M. / Effects of roll vortices on turbulent fluxes in the hurricane boundary layer. In: Boundary-Layer Meteorology. 2008 ; Vol. 128, No. 2. pp. 173-189.
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