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Relative Diffusion of Tetroon Pairs During Convective Conditions

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  • 1 Atmospheric Turbulence & Diffusion Laboratory, NOAA, Oak Ridge, Tenn. 37830
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Abstract

Observations of the relative diffusion of 13 sets of tetroon pairs in the mixed layer during convective conditions in eastern Tennessee are reported. The root-mean-square separation S is proportional to time t raised to a power of 1 for times from 2 to 30 min and a power of 0.75 for times from 30 to 100 min. On the average, the observations are satisfied by the approximation dS/dtσy where σy is the standard deviation of the lateral wind speed fluctuations, as sensed by the tetroon.

Abstract

Observations of the relative diffusion of 13 sets of tetroon pairs in the mixed layer during convective conditions in eastern Tennessee are reported. The root-mean-square separation S is proportional to time t raised to a power of 1 for times from 2 to 30 min and a power of 0.75 for times from 30 to 100 min. On the average, the observations are satisfied by the approximation dS/dtσy where σy is the standard deviation of the lateral wind speed fluctuations, as sensed by the tetroon.

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