The relation between the E-region gravity waves and the F-region plasma depletions observed with an all-sky imager at Arecibo

Details The relation between the E-region gravity waves and the F-region plasma depletions observed with an all-sky imager at Arecibo The relation between the E-region gravity waves and the F-region plasma depletions observed with an all-sky imager at Arecibo

Dec 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufmsa23a1777s&link_type=abstract

American Geophysical Union, Fall Meeting 2010, abstract #SA23A-1777

Other

[2427] Ionosphere / Ionosphere/Atmosphere Interactions, [2439] Ionosphere / Ionospheric Irregularities, [2443] Ionosphere / Midlatitude Ionosphere, [3384] Atmospheric Processes / Acoustic-Gravity Waves

Scientific paper

At mid-latitudes, F-region plasma depletions called plumes and medium scale traveling ionospheric disturbances (MSTIDs) have been regularly observed with all-sky imagers using the 630 nm airglow emission. On the other hand, various types of gravity waves are commonly observed in the E-region using the 557.7 nm airglow emission. Atmospheric gravity waves (AGWs) have commonly been suggested as a potential seeding mechanism for F-region instabilities. Recent studies have discovered an electrodynamic coupling between the E and F regions. In this study, we use 557.7 nm and 630 nm airglow data from an all-sky imager located at Arecibo Observatory (AO) to statistically compare the occurrences of the E-region gravity waves and the F-region plasma depletions (e.g., MSTIDs and plumes) during the period of 2003-2008. A correlation between the events in these two ionospheric layers is observed suggesting that the gravity waves are one of the major seeding sources of the mid-latitude F-region irregularities. Example case studies when events in both layers have been observed simultaneously are also presented to compare various properties of gravity waves, plumes, and MSTIDs.

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