Abstract
In order to provide data of atmospheric temperature microstructure for the investigation of light propagation we measured fluctuations of atmospheric temperature below the height of 300 m with a platinum wire thermometer in Tianjin in May and September, 1980. The results measured in daytime revealed some properties of the temperature structure parameter and spectrum. It has been confirmed that there is a maximum in the profile of the structure parameter produced probably by the entrainment in the interfacial layer at the top of convective boundary layer. The average of $$C_{T^2 } $$ in the interfacial layer and its Wyngaard calculating method are discussed, and the thickness of the interfacial layer is obtained. It is shown by spectrum analysis that a wide inertial subrange exists in the convective boundary layer and the strong turbulent zone in the free atmosphere. The spectral law with the power of −2.5 was measured within the upper half of boundary layer over the sea in vicinity of Tanggu.
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