A Multi Instrument Case Study of Cyclone Ockhi and its effect on Ionosphere over the Indian Sector.
Abstract
The ionosphere gets modulated by the upward propagating waves that originated from different meteorological processes in the troposphere such as thunderstorms, tropical cyclones etc. Present work shows the effect of cyclone Ockhi which originated from a low pressure area over southwest Bay of Bengal and adjoining areas of south Sri Lanka & equatorial Indian Ocean on 28 November, 2017. This cyclone falls under very severe cyclonic storm category and hence its effect on ionosphere has been investigated. The study will discuss the variation of various ionospheric parameters/phenomena over this period using variety of instruments such as ionosondes, GPS derived TEC, scintillation data etc over the Indian equatorial station Tirunelveli. Interestingly, strong Spread F signatures were observed during the period of intense phase of the cyclone. The possible role of gravity waves associated with cyclonic activity, considered as source of seeding of spread F is investigated. Moreover, the ray tracing of gravity waves generated due to these cyclones are also carried out.
- Publication:
-
AGU Fall Meeting Abstracts
- Pub Date:
- December 2018
- Bibcode:
- 2018AGUFMNH13C0709S
- Keywords:
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- 4301 Atmospheric;
- NATURAL HAZARDSDE: 4302 Geological;
- NATURAL HAZARDSDE: 4313 Extreme events;
- NATURAL HAZARDSDE: 4333 Disaster risk analysis and assessment;
- NATURAL HAZARDS