Na lidar investigation of sporadic Na layer and its correlation with sporadic E layer detected by ionosonde

Details Na lidar investigation of sporadic Na layer and its correlation with sporadic E layer detected by ionosonde Na lidar investigation of sporadic Na layer and its correlation with sporadic E layer detected by ionosonde

Dec 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufmsa31b1977y&link_type=abstract

American Geophysical Union, Fall Meeting 2011, abstract #SA31B-1977

Physics

[2427] Ionosphere / Ionosphere/Atmosphere Interactions, [3307] Atmospheric Processes / Boundary Layer Processes, [3334] Atmospheric Processes / Middle Atmosphere Dynamics, [3389] Atmospheric Processes / Tides And Planetary Waves

Scientific paper

It has been long speculated that there is a strong correlation between sporadic E layer and sporadic Na layer. Theoretical studies show the mid-latitude sporadic E layers in the lower ionosphere E region are mostly formed by large wind shear driven by solar thermal tides or gravity waves. The thin Na ion layer then interacts with the electrodynamics to form sporadic Na layer when this cluster of Na ions are push downwards into the mesopause region with the waves' downward phase progression. However, direct simultaneous observations of the sporadic metal layer and E layers are rare, not to mentioned the atmospheric background and tidal signatures measurements during such event. In this paper, a few of such daytime sporadic events in the summer of 2011 were observed by the Na lidar at Utah State University (42°N, 112°W) and CADI ionosonde at Bear Lake Observatory (40 miles away from the lidar location). Atmospheric background, including temperature, horizontal winds, as well as tidal modulations and wind shear will be calculated based on Na lidar results, while ionosonde data simultaneously monitor the sporadic E layer behavior.

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