Marés atmosféricas nas medidas de temperatura obtidas por radar de meteoros

Abstract

The measurements obtained from meteorological radars have provided simultaneous observations of mesospheric parameters in the equatorial and low latitudes regions of the southern hemisphere, thus establishing a great potential for the development of research in order to better understanding the dynamics of the MLT region. To estimate the mesopause temperature, data from the meteoric signals decay time, t1/2, obtained through the radar installed in São João do Cariri-PB (7.4°S, 36.5°W) and Cachoeira Paulista-SP (22,7°S; 45,0°W) between 2004 and 2008 were used. Intending to acquire tide information in relation to temperature, a “compound day” approach and a standard temperature determination algorithm were used to obtain diurnal and semidiuranl tides. In this work, temperatures were determined using the pressure and gradient method, and estimated the amplitudes and phases of the diurnal and semidiurnal tides from them and compared with the Global Scale Wave Model (GSWM-02). The gradient method, in São João do Cariri – PB, presented graphs more similar than the pressure model when compared to the GSWM model, reproducing the semiannual oscillation in the diurnal tides and values of the same magnitude in most of the years studied.