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Optical and in situ measuring of structure parameters relevant to temperature and humidity, and their application to the measuring of sensible and latent heat flux
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1982
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By Kohsiek, W.
[PDF-77.89 MB]
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Description:Optical measurements of the structure parameters of temperature2 2(C,j, ), humidity (Cq ) and temperature-humidity (CTq) were attempted at 0.94 ym, 10.7 ym (CO„ laser) and 337 ym (HCN laser), but owing to various ^ 2 instrumental problems no measurement of C^ and C^^ could be achieved. In situ measurements of the same parameters were more successful. Two techniques of measuring structure parameters are compared: by using spaced sensors, and by time-lagging one sensor. In this way the expected r ' dependency of the structure parameter could be checked (r = distance between sensors, either by spacing or by time-lagging). From the connection between structure parameters and spectra, evidence of an inertial subrange for the temperature-humidity cospectrum is found. Special attention is paid to the use of Ly-a hygrometry for measuring structure parameters involving humidity. Finally, relations between 2 2 the structure parameters and , and the fluxes of heat and moisture are discussed; an effect of atmospheric stability was not detectable for -z/L > 0.02.
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Rights Information:CC0 Public Domain
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