Title :
VHF radar studies of the migrating and nonmigrating diurnal and semidiurnal tides over a tropical and an equatorial station
Author :
Uma, K.N. ; Kumar, K.K. ; Das, S.S.
Author_Institution :
Space Phys. Lab., Vikram Sarabhai Space Centre, Trivandrum, India
Abstract :
VHF radar measurements of winds are utilized to study the diurnal and semi-diurnal tides over Gadanki and Kotatabang. The tidal amplitudes exhibit maxima in UTLS region during June-September over Gadanki and during March and September over Kotatabang. The vertical wavelength is 3-5 km (Gadanki) and 25-30 km (Kotatabang), which reveal the existence of nonmigrating and migrating tides, respectively. Brightness temperature shows that over Gadanki(deep) and Kotatabang(shallow) convective clouds. Release of latent heat due to deep-clouds is found to be the main source mechanism for nonmigrating tides. The present study brings out the differences in tides over equatorial and low latitude.
Keywords :
atmospheric temperature; clouds; tides; wind; Gadanki; India; Kotatabang; VHF radar measurement; brightness temperature; convective clouds; deep clouds; equatorial station; latent heat release; migrating diurnal tide; nonmigrating semidiurnal tide; tidal amplitude; tropical station; wind; Clouds; Ear; Radar; Tides; Water heating;
Conference_Titel :
General Assembly and Scientific Symposium, 2011 XXXth URSI
Conference_Location :
Istanbul
Print_ISBN :
978-1-4244-5117-3
DOI :
10.1109/URSIGASS.2011.6050834
