[IGPP Everyone] Fw: AOS 270 Seminar- Angeline Burrell- MONDAY

Fri May 13 15:06:09 PDT 2016

From: Torres, Allison 
Sent: Thursday, May 12, 2016 1:43 PM
To: ATMOS Seminar 
Subject: AOS 270 Seminar- Angeline Burrell- MONDAY

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

*** 4:00 seminar time

            Monday, May 16, 2016

            4:00 PM to 5:00PM

            MS 7124

 http://www.atmos.ucla.edu

 University of California, Los Angeles

            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.

Allison (Kentfield) Torres

Administrative Specialist

UCLA Department of Atmospheric & Oceanic Sciences                                                           

(  (310) 825-1217     |   *  atorres at atmos.ucla.edu

Working Hours: 6:45am-3:45pm

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