Generation of Air Temperature Fluctuations
by Small-Scale Land-Surface Temperature Irregularities

V. P. Kukharets, V. G. Perepelkin, and L. R. Tsvang

Oboukhov Institute of Atmospheric Physics, Russian Academy of Sciences, Pyzhevskii per. 3, Moscow, 109017 Russia

Received April 27, 1998; in final form, June 22, 1998

Abstract—The results of simultaneous measurements of the characteristics of the atmospheric surface layer
(ASL) and small-scale surface temperature irregularities (SSSTIs) are given. The measurements were taken in
Tsimlyansk (1993, 1994) and in Zvenigorod (1996). An analysis of the obtained results shows that, in a number
of cases, SSSTIs noticeably affect turbulence characteristics and profiles T(z), which results in a noticeable dis-
agreement between measured and calculated (on the basis of the similarity theory equations) values of the tur-
bulent temperature fluxes w'T '. The introduction of the depth of the temperature displacement layer d_T in the
calculation formulas results in a markedly better agreement between the calculated and measured values of
w'T '. SSSTIs also affect the shape of the spectra of air temperature fluctuations.

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