ESF-related airglow depletions at Arecibo and conjugate observations

Details ESF-related airglow depletions at Arecibo and conjugate observations ESF-related airglow depletions at Arecibo and conjugate observations

May 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007agusmsa24a..05m&link_type=abstract

American Geophysical Union, Spring Meeting 2007, abstract #SA24A-05

Other

2415 Equatorial Ionosphere, 2435 Ionospheric Disturbances, 2439 Ionospheric Irregularities, 2443 Midlatitude Ionosphere, 2494 Instruments And Techniques

Scientific paper

Data from the Boston University all-sky imager located at Arecibo, Puerto Rico (18.3° N, 66.7° W, 28° N mag lat), have been used to identify several nights with 630.0 nm airglow patterns that are typical signatures of equatorial Spread-F (ESF) and distinctly different from the more common airglow bands frequently observed there. Two case studies show the occurrence of simultaneous airglow depletions observed with another all-sky imager located at El Leoncito, Argentina (31.8° S, 69.3° W, 18° S mag lat), relatively close to the Arecibo conjugate point. Supporting information is obtained from DMSP, ROCSAT-1 and GPS data, all of them showing the presence of strong ionospheric irregularities collocated with the airglow depletions. Mapping the circular field of view from Arecibo into the southern hemisphere reveals a distorted pattern due to the differences in the magnetic field characteristics in both hemispheres. Arecibo's location can play a pivotal role in attempts to understand how low to mid-latitude coupling occurs. The region poleward of ~18° magnetic latitude and equatorward of ~25° magnetic latitude can be considered a good example of a transition region in which low latitude processes can be seen extending to midlatitudes.

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