A Note on Turbulence Stationarity and Wind Persistence Within the Stable Planetary Boundary Layer |
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Authors: | Carmen J Nappo April L Hiscox David R Miller |
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Institution: | 1.CJN Research Meteorology,Knoxville,USA;2.Louisiana State University,Baton Rouge,USA;3.The University of Connecticut,Storrs,USA |
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Abstract: | This note presents initial results of an analysis of the stationarity of turbulence kinetic energy and the persistence of
winds within the stable boundary layer (SBL). Measurements were made at 1.5 and 11 m above ground level from 0100 to 0600
local time on five nights during the JORNADA field experiment. The average stationarity ranged from about 160 to about 570
s. Wind persistence ranged from about ± 40° (3-min average) to about ± 36° (30-min average) on a weakly stable night, and
from about ± 40° (3-min average) to about ± 27° (30-min average) on an strongly stable night. It is shown that, at 1.5 m,
which we take to be within the surface layer, the average duration of stationarity of turbulent kinetic energy tends to correlate
with the kurtosis of the heat flux; however, at 11 m, which we take to be outside of the surface layer, this correlation is
poorly approximated. |
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