Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 506006
Title Can we Estimate the Fog-top Height from Atmospheric Turbulent Measurements at Surface?
Author(s) Román-Cascón, C.; Yague, C.; Steeneveld, G.J.; Sastre, M.; Arrillaga, J.A.; Maqueda, G.
Event 22nd Symposium on Boundary Layers and Turbulence, Salt Lake City, 2016-06-20/2016-06-24
Department(s) Meteorology and Air Quality
Publication type Abstract in scientific journal or proceedings
Publication year 2016
Abstract The knowledge of the fog-top height (fog thickness) can be very important for aircraft maneuvers, data assimilation/validation of Numerical Weather Prediction models or to improve the nowcasting of the fog-dissipation time. Nevertheless, its value is usually difficult to determine and it is normally approximated with satellite data, ground remote-sensing instruments or through its estimation using temperature and humidity data from atmospheric soundings. These instruments are expensive and their data are not always available.
In this work, we show how the fog-top height has a linear correlation with atmospheric turbulent variables measured close to the surface. These relations are statistically calculated from high-quality observational data of several radiation-fog events at two research sites: The Research Centre for the Lower Atmosphere (CIBA) in Spain and the Cabauw Experimental Site for Atmospheric Research (CESAR) in The Netherlands. Thus, surface friction velocity and buoyancy heat flux are presented as potential indicators of fog thickness.

The presented correlations are also evaluated over a long-lasting radiation-fog event at CESAR. The proposed methods could be operationally implemented for providing a continuous estimation of fog-top height through the deployment of a sonic anemometer close to the surface.
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