title: Spatio-temporal slope measurement of short wind waves under the influence of surface films at the Heidelberg Aeolotron 
creator: Reith, Svenja
subject: ddc-000
subject: 000 Generalities, Science
subject: ddc-500
subject: 500 Natural sciences and mathematics
subject: ddc-530
subject: 530 Physics
subject: ddc-550
subject: 550 Earth sciences
description: A novel, high resolution Imaging Slope Gauge (ISG) at the Heidelberg Aeolotron is presented. The instrument allows measurements of the two-dimensional slope of short wind-driven water waves at unprecedented temporal and spatial resolution. Wave number spectra are measured up to k = 13000 rad/m with a temporal resolution of more than 1500 Hz. The high sampling frequency eliminates aliasing up to wave numbers of about k = 2660 rad/m. A new non-linear calibration and data processing work flow has been implemented to convert raw camera images into wave slope in the range of \pm 0.96. The average statistical measurement error is estimated to be \Delta s_rms = 0.018, a significant improvement compared to previous Color Imaging Slope Gauge setups.     Spectrally resolved measurements of the influence of various surface-active materials (surfactants) on small-scale waves are reported. The wave damping effects of different substances are analyzed. It is shown that, except for low wind speeds, gas transfer velocities across the air-sea boundary layer can be parametrized with the mean square slope of the waves, independent of the specific type of surfactant that is used.
date: 2014
type: Master's thesis
type: info:eu-repo/semantics/masterThesis
type: NonPeerReviewed
format: application/pdf
identifier: https://archiv.ub.uni-heidelberg.de/volltextserverhttps://archiv.ub.uni-heidelberg.de/volltextserver/17697/1/Masterarbeit_SvenjaReith.pdf
identifier: DOI:10.11588/heidok.00017697
identifier: urn:nbn:de:bsz:16-heidok-176975
identifier:   Reith, Svenja  (2014) Spatio-temporal slope measurement of short wind waves under the influence of surface films at the Heidelberg Aeolotron.  [Master's thesis]     
relation: https://archiv.ub.uni-heidelberg.de/volltextserver/17697/
rights: info:eu-repo/semantics/openAccess
rights: http://archiv.ub.uni-heidelberg.de/volltextserver/help/license_urhg.html
language: eng