Mesospheric Gravity wave momentum fluxes and their seasonal variation over a low latitude region Trivandrum (8.5°N, 77°E), India

Details Mesospheric Gravity wave momentum fluxes and their seasonal variation over a low latitude region Trivandrum (8.5°N, 77°E), India Mesospheric Gravity wave momentum fluxes and their seasonal variation over a low latitude region Trivandrum (8.5°N, 77°E), India

May 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007agusmsa31a..12a&link_type=abstract

American Geophysical Union, Spring Meeting 2007, abstract #SA31A-12

Physics

1620 Climate Dynamics (0429, 3309), 3332 Mesospheric Dynamics, 3334 Middle Atmosphere Dynamics (0341, 0342)

Scientific paper

Gravity waves play a profound role in the energetics and dynamics of the MLT region. Mainly generated in the lower atmosphere they propagate vertically upwards, thus carrying energy and momentum fluxes from lower atmosphere to MLT region where they attain maximum wave amplitudes. Determining the gravity wave momentum fluxes is a crucial requirement in understanding the momentum and energy budgets of the MLT region. Earlier studies have been carried out using VHF and MF radars, which have limited seasonal and height coverage. To understand the global morphology of gravity wave momentum fluxes, continuous measurements of winds are required in MLT region. Meteor wind radars are well suited for this purpose owing to their uninterrupted data coverage. Using two years of data (2004-2006) from All-sky SKiYMET Meteor Wind Radar at Space Physics Laboratory (SPL), Trivandrum (8.5°N, 77°E) operating at a VHF frequency of 35.25 MHz and a pulse repetition frequency of 2144 Hz, an attempt has been made to estimate the momentum fluxes of gravity waves in the MLT region (82-98km). Seasonal variation in the momentum fluxes is also estimated. The detailed study will be presented.

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