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Study of F3 layer and sudden stratospheric warming effects in low-latitude ionosphere and equatorial region, during solar cycle 24

Grant number: 13/25037-4
Support type:Scholarships in Brazil - Post-Doctorate
Effective date (Start): April 01, 2014
Effective date (End): June 30, 2014
Field of knowledge:Physical Sciences and Mathematics - Geosciences - Geophysics
Principal Investigator:Paulo Roberto Fagundes
Grantee:Sukumaran Nair Geetha Kumari Sumod
Home Institution: Instituto de Pesquisa e Desenvolvimento (IP&D). Universidade do Vale do Paraíba (UNIVAP). São José dos Campos , SP, Brazil
Associated research grant:12/08445-9 - Study of day-to-day variability of the mesosphere, thermosphere and ionosphere at low latitude and equatorial region, during the solar cycle 24, AP.TEM


To investigate various coupling processes ubiquitous in the equatorial and low latitude upper atmosphere (~90-500 km) with special emphasis on the forcing from lower atmosphere. The specific problems are:The study on the effects of waves and tides in modulating the ionospheric variability through the vertical coupling. This will primarily examine the role of neutral dynamical forcing of lower atmospheric origin in context of well-known electrodynamic phenomena like the Equatorial Ionization Anomaly (EIA) and Equatorial Spread-F (ESF) using combined optical and radio measurements.Understanding the High latitude-low latitude coupling during geomagnetically quiet times in view of the dramatic meteorological phenomena called the Stratospheric Sudden Warming (SSW). This will mainly investigate the day and night time response of equatorial/low latitude upper atmosphere during both southern and northern SSW events using combined optical, radio and NCEP/NCAR reanalysis data sets.The study of generation, evolution and variability of F3 layer in the equatorial and low latitude ionosphere due to the forcing from below. In particular, the modulation in the occurrence pattern of this layer with the phase of long period lower atmospheric oscillations in addition to its short term variability due to the Gravity/Planetary waves and tides, if any will be addressed.

Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
SUMOD, S. G.; PANT, TARUN KUMAR; VINEETH, C.; HOSSAIN, M. M. On the ionospheric and thermospheric response of solar flare events of 19 January 2005: An investigation using radio and optical techniques. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, v. 119, n. 6, p. 5049-5059, JUN 2014. Web of Science Citations: 2.

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