The Equatorial Ionosphere over Jicamarca during the January 2009 Sudden Stratospheric Warming

Details The Equatorial Ionosphere over Jicamarca during the January 2009 Sudden Stratospheric Warming The Equatorial Ionosphere over Jicamarca during the January 2009 Sudden Stratospheric Warming

May 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agusmsa74a..05c&link_type=abstract

American Geophysical Union, Spring Meeting 2009, abstract #SA74A-05

Physics

2411 Electric Fields (2712), 2415 Equatorial Ionosphere, 2427 Ionosphere/Atmosphere Interactions (0335), 2494 Instruments And Techniques, 3389 Tides And Planetary Waves

Scientific paper

Last year we reported a high correlation between anomalous daytime ionospheric electric fields over Jicamarca and parameters associated with January 2008 Sudden Stratospheric Warming (SSW) event. Such distinct pattern in the equatorial drifts has been observed in previous SSW campaigns over Jicamarca, but the correlation was not as high as in the January 2008 event. Our results indicate that there is a strong coupling between the lower atmospheric processes related to the SSW events and the low-latitude ionosphere, however, the effects appear to be longitudinally dependent. In this work we present the eleven days of Jicamarca observations around the recent January 2009 SSW event. Besides obtaining vertical drifts from the incoherent scatter radar, this time we used a new mode that allows also the measurement of zonal drifts, electron density profiles, electron to ion temperature ratio, and mesospheric winds. In addition, we operated a new ionosonde called VIPIR in high time resolution. Our preliminary results indicate that indeed the equatorial ionosphere got disturbed during the SSW event, presenting again anomalous vertical drifts and therefore anomalous electron density values and profiles.

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