An Investigation into Height Variation of Ionospheric Signature Due To the Cyclonic Storm Formation Using COSMIC-RO Measurements
Journal Title: International Journal of engineering Research and Applications - Year 2017, Vol 7, Issue 7
Abstract
Here the height dependence of ionospheric signature due to the existence of low pressure systems, like, Cyclonic Storms (CSs) at the lower atmosphere, have been studied using COSMIC-RO satellite measurements on the example of two deleterious cyclones – Mahasen (10-16th May 2013) and Phailin (8-14th October 2013). These two CSs were generated over the Bay of Bengal (BOB) in 2013. Day-to-day variations of four different physical parameters, namely, IEC, NmF2, HmF2 and the NOAA Outgoing Long Wave Radiation (OLR) have been retrospectively analyzed during the Cyclone Genesis Period (CGP). For the first time, five 50 km width ionospheric layers have been considered to rectify the dominant perturbation zone linked to the considered lower atmospheric convective activities. All the ionospheric parameters exhibit excellent correlation between themselves whereas OLR exhibit little correlation with the ionospheric parameters. Both, pre-cursor and post cursor signatures have been registered at the ionospheric F2 layer in the pre and post Cyclone Life Cycle (CLC). Here, the dominant perturbations were mostly confined in the layers associated to lower F region of the bottom side Ionosphere and it is gradually decreasing for the upper layers. Moreover, few discrepancies which were detected in case of two CSs were mainly due to dissimilar strength of CSs and difference of sampling size of ionospheric data. Atmospheric Gravity Waves (AGWs) is assumed to be the main responsible coupling agent between lower atmosphere and Ionosphere during this type of lower atmospheric convective activities, like CSs.
Authors and Affiliations
Gopal Mondal, Manojit Gupta, Goutam Kumar Sen
Keywords
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- EP ID EP391873
- DOI 10.9790/9622-0707077685.
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