Turbulent eddy characteristics in temperature and wind field of surface layer during MONTBLEX’90 over Jodhpur, India

380-390Study of turbulent eddies is a very challenging topic, as it plays a dominant role in controlling the transport of atmospheric constituents in the tropical boundary layer. Tower data of temperature and horizontal wind speed collected by fast response sensors during MONTBLEX'90 (MONsoon trough Boundary Layer Experiment, 1990) field experiment, are considered here, to study the characteristics of the eddies. For this purpose autocorrelation has been performed, by applying a series of lags to different data set. Studying the value of autocorrelation, an attempt is made to determine the type and nature of turbulence eddies, which dominates in the surface boundary layer during the period concerned. The observation shows that turbulent plumes have a specific temporal scale during this period of study. At the same time the approximate spatial extension of the plumes in both horizontal and vertical directions is suggested for some general days as well as for some synoptically significant days. Lastly, comparative studies about the sensitivity of the sensors have been performed