[IGPP Everyone] AOS 270 Seminar- MONDAY 4pm - “Long-term variations in High-Frequency backscatter” (Angeline Burrell, Univ. Leicester)

[Emmanuel V. Masongsong]

Please join us for the AOS 270 Seminar, Monday, May 16 , 2016 with Angeline Burrell ! 



*** 4:00 seminar time 














Angeline Burrell 

University of Leicester 



“Long-term variations in High-Frequency backscatter” 



ABSTRACT: 



The polar ionosphere is a dynamic region that readily responds to changes in solar irradiance, solar wind, the magnetosphere, and the neutral atmosphere. The Super Dual Auroral Radar Network (SuperDARN) observes the high-latitude ionosphere using coherent scatter High Frequency (HF) radars. SuperDARN has been operational for more than a solar cycle, and so provides an invaluable dataset for studying long-term ionospheric variability at high latitudes. Groundscatter, the backscatter that returns from a reflection point on the ground rather than from an ionospheric irregularity, is especially interesting because reflects the state ionosphere in the presence or absence of irregularities. We have seen that the amount of groundscatter observed at the Hankasalmi radar changes dramatically with season and solar cycle, with the strongest solar cycle dependence seen during the December solstice. This study examines the solar cycle and local time differences in groundscatter propagation characteristics. 




Monday, May 16 , 2016 

4:00 PM to 5:00PM 

MS 7124 
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