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

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The Nature of High Reynolds Number Turbulence

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.

This talk is part of the Isaac Newton Institute Seminar Series series.

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