Sea surface wind stress and drag coefficients: The hexos results

Smith, Stuart D., Anderson, Robert J., Oost, Wiebe A., Kraan, C., Maat, Nico, De Cosmo, Janice, Katsaros, Kristina B., Davidson, Kenneth L., Bumke, Karl, Hasse, Lutz and Chadwick, Helen M. (1992) Sea surface wind stress and drag coefficients: The hexos results Boundary-Layer Meteorology, 60 (1-2). pp. 109-142. DOI 10.1007/BF00122064.

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Turbulent fluxes have been measured in the atmospheric surface layer from a boom extending upwind from the Dutch offshore research platform Meetpost Noordwijk (MPN) during HEXMAX (Humidity Exchange over the Sea Main Experiment) in October–November, 1986. We started out to study eddy flux of water vapour, but discrepancies among simultaneous measurements made with three different anemometers led us to develop methods to correct eddy correlation measurements of wind stress for flow distortion by nearby objects. We then found excellent agreement among the corrected wind stress data sets from the three anemometers on the MPN boom and with eddy correlation measurements from a mast on a tripod. Inertial-dissipation techniques gave reliable estimates of wind stress from turbulence spectra, both at MPN and at a nearby ship. The data cover a range of wave ages and the results yield new insights into the variation of sea surface wind stress with sea state; two alternative formulas are given for the nondimensional surface roughness as a function of wave age.

Document Type: Article
Keywords: Mast; Wind Stress; Turbulent Flux; Atmospheric Surface Layer; Turbulence Spectrum
Research affiliation: OceanRep > GEOMAR > FB1 Ocean Circulation and Climate Dynamics > FB1-ME Maritime Meteorology
Refereed: Yes
DOI etc.: 10.1007/BF00122064
ISSN: 0006-8314
Date Deposited: 09 Mar 2018 13:27
Last Modified: 09 Mar 2018 13:27

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