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
Highlights
Knowledge of the altitudinal profile of wind information of a site is very much essential as it is useful in many aspects of wind energy development, in general, and aviation purposes, in particular
Remote sensing instruments complemented with other ground- and satellite-based instruments could only provide a complete picture of the various atmospheric dynamics and their evolutions in terms of hourly, daily, monthly, or seasonal variations
COSMIC radio occultation technique (RO) technique was initiated jointly by Taiwanese and US governments in 2006, and it is a constellation of six low-earth orbiting (LEO) satellites with an inclination of around 56°
Summary
Knowledge of the altitudinal profile of wind information of a site is very much essential as it is useful in many aspects of wind energy development, in general, and aviation purposes, in particular. Earth’s Atmospheric Dynamics and Temperature and Pressure Profiles Over a Low-Latitude Indian Station Using Different Remote Sensing Techniques – A Case Study monitoring methods.[1] On the other hand, LIDAR (LIght Detection And Ranging) and SODAR (SOund Detection And Ranging) are two effective remote sensing techniques that are being extensively used by the scientific fraternity to measure wind direction and speed up to a few several kilometers. These remote sensing techniques are far superior to the conventional cup anemometers in measuring wind, because of their unique and useful characteristics which include measurement of higher-altitude (vertical) winds, highervolume measurements, ease of installation, portability and its ability to be operated for hours together unattended.
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