Evidence of Polar Mesosphere Summer Echoes Observed by SuperDARN SANAE HF Radar in Antarctica

We report on the polar mesosphere summer echoes (PMSE) occurrence probability over SANAE (South African Na- tional Antarctic Expedition) IV, for the first time. A matching coincidence method is described and implemented for PMSE extraction from SuperDARN (Super Dual Auroral Radar Network) HF radar....

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Bibliographic Details
Published in:TAO : Terrestrial, atmospheric, and oceanic sciences atmospheric, and oceanic sciences, 2015-08, Vol.26 (4), p.431-440
Main Authors: Ogunjobi, Olakunle, Sivakumar, Venkataraman, Stephenson, Judy Ann Elizabeth, Sivla, William Tafon
Format: Article
Language:English
Subjects:
Algorithms
Antarctic expeditions
atmospheric science
Broadband
Diurnal
Echoes
Expeditions
geology
geophysics
Gravity waves
hydrology
Mesosphere
oceanic science
Polar mesosphere
Polar mesosphere summer echoes
Precipitation
Probability
Probability theory
Radar
Radar networks
Radiometry
Seasonal variation
Seasonal variations
space science
Summer
Weather
Wind variations
Winds
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Summary:We report on the polar mesosphere summer echoes (PMSE) occurrence probability over SANAE (South African Na- tional Antarctic Expedition) IV, for the first time. A matching coincidence method is described and implemented for PMSE extraction from SuperDARN (Super Dual Auroral Radar Network) HF radar. Several SuperDARN-PMSE characteristics are studied during the summer period from years 2005 - 2007. The seasonal and interannual SuperDARN-PMSE variations in relation to the mesospheric neutral winds are studied and presented in this paper. The occurrence probability of SuperDARN- PMSE on the day-to-day scale show, predominantly, diurnal variation, with a broader peak between 12 - 14 LT and distinct minimum of 22 LT. The SuperDARN-PMSE occurrence probability rate is high in the summer solstice. Seasonal variations show a connection between the SuperDARN-PMSE occurrence probability rate and mesospheric temperature from SABER (Sounding of the Atmosphere using Broadband Emission Radiometry). The seasonal trend for both meridional and zonal winds is very stable year-to-year. Analysis of the neutral wind variations indicates the importance of pole-to-pole circulations in SuperDARN-PMSE generation.
ISSN:1017-0839
2311-7680
DOI:10.3319/TAO.2015.03.06.01(AA)