Physics
Scientific paper
Dec 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufmsa23b..04s&link_type=abstract
American Geophysical Union, Fall Meeting 2011, abstract #SA23B-04
Physics
[3332] Atmospheric Processes / Mesospheric Dynamics
Scientific paper
This investigation is based on case studies of sodium (Na) concentration profiles that were obtained from Arecibo, Puerto Rico (18.4o N; 66.7o W). The data from one night reveal the presence of large scale billows-like structures in the Na layer occurring in an altitude range of 102-108 km. However, no large scale structures were observed in that altitude range on the following night. In order to explain the occurrence of these structures, Lomb-Scargle periodogram analyses were carried out. Based on these results, the role of different instability mechanisms will be discussed in light of mesospheric dynamics that can create billows-like structures. The simultaneous measurements of electron density obtained using the Arecibo Incoherent Scatter Radar will also be discussed to investigate the relation between electrons and neutrals. We also note the presence of ~1 hour period oscillations that may be related to continuous quasi-periodic processes of the same period noted at higher altitudes.
González Sixto A.
Mathews John D.
Raizada Shika
Sarkhel S.
Tepley Craig A.
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