Indian Journal of Science and Technology

Abstract

Background/objectives: Even after plenty of inclusive studies, the earth’s lower atmospheric dynamics and a few important atmospheric parameters (temperature and pressure, etc.) have not yet been completely understood, particularly over equatorial and low-latitude regions. Methods/analysis: An attempt is made here by effectively utilising various ground- and satellite-based remote sensing instrument (Doppler sodar) data over a typical low-latitude Indian station, i.e. Gadanki (13.45°N, 79.16°E), to understand different atmospheric dynamics, and the critical behaviors of temperature and pressure profiles as measured by radiosonde and COSMIC RO techniques are presented. Findings: Zonal, meridional and vertical winds measured using the Doppler sodar showed distinct diurnal and nocturnal variations; most importantly, the evolution of night-time boundary layer was observed. A one-to-one correspondence was seen between radiosonde measured and COSMIC RO measured temperature and pressure profiles. Applications/improvements: This study recommends that it is very much essential to use different available datasets from various remote sensing instruments to completely understand the earth’s atmospheric dynamics since various dynamical interactions play a role in dictating them directly and indirectly near the earth’s surface.
Keywords: Low-latitude Station, Doppler Sodar, Radiosonde, COSMIC RO Technique, Atmospheric Dynamics, Nocturnal Boundary Layer