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An event-based description of the heat-flux time series in an atmospheric boundary layer

Thursday 11th September 2008 - 15:50 to 16:10
INI Seminar Room 1
Session Chair: 
R Adrian
A new method of describing the turbulent momentum flux time series (which we call the ‘extended point-process’ method) has recently been proposed (Narasimha+ 2007 Phil. Trans A). In this method ‘flux events’ are identified in the associated time series, and their characteristics defined in terms of their contributions to the mean flux (so events can be of either sign). We extend the method here to provide a similar description of the eddy heat flux time series, and show the enormous influence exerted by the state of stability of the atmospheric boundary layer on flux-event statistics.
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Presentation Material: 
University of Cambridge Research Councils UK
    Clay Mathematics Institute London Mathematical Society NM Rothschild and Sons