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Indian Journal of Radio & Space Physics (IJRSP) >
IJRSP Vol.41 [2012] >
IJRSP Vol.41(2) [April 2012] >
| Title: | On the linkage between mesospheric gravity waves and occurrence of equatorial plasma bubble observed during the low solar activity |
| Authors: | Taori, A
Kamalakar, V
Joshi, L M
Sripathi, S
Patra, A K |
| Keywords: | Equatorial plasma bubble (EPB)
Equatorial spread F (ESF)
Mesospheric gravity wave
Rayleigh-Taylor (RT) instability |
| Issue Date: | Apr-2012 |
| Publisher: | NISCAIR-CSIR, India |
| PACS No.: | 92.60.hc; 94.20.dt |
| Abstract: | In this paper, the linkage between the low-latitude
mesospheric gravity waves and the equatorial plasma bubble (EPB) have been
investigated using simultaneously Rayleigh lidar and VHF radar observations
from Gadanki (13.5oN, 79.2oE) and ionosonde observations
from Tirunelveli (8.7oN, 77.8oE) made between 2007 and
2009 when solar activity was undergoing a deep minima. The two sets of
observations have been analysed, each comprising of one case having EPB and
another without EPB observed on two nearby nights. Observations show that the
occurrences of plume structures in the radar observations are found to have a
close link with the amplitudes of the short period gravity waves in the
mesospheric temperature. It is argued that such waves have an important role in
seeding the Rayleigh-Taylor (RT) instability manifesting EPB. |
| Page(s): | 264-270 |
| CC License: |  CC Attribution-Noncommercial-No Derivative Works 2.5 India |
| ISSN: | 0975-105X (Online); 0367-8393 (Print) |
| Source: | IJRSP Vol.41(2) [April 2012]
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