2018 CAP Congress / Congrès de l'ACP 2018

POS-10 Superposed epoch analysis of cosmic noise absorption due to co-rotation interaction regions (CIR)

12 Jun 2018, 18:00

1h 30m

SUB McInnes Hall (Dalhousie University)

Poster (Non-Student) / Affiche (Non-étudiant(e)) Atmospheric and Space Physics / Physique atmosphérique et de l'espace (DASP-DPAE) DASP Poster Session & Finals: Poster Competition & Mingle Session with Industrial Partners (6) /Employers| Session d'affiches DPAE et finales: Concours d'affiches et rencontres avec partenaires industriels et employeurs (6)

Speaker

Robyn Fiori (Natural Resources Canada)

Description

In order to adequately understand the effects that energetic particle precipitation bears on radio wave absorption, we have analysed cosmic noise absorption (CNA) measured by the imaging riometer at Kilpisjarvi, Finland (IRIS) during 1996-2011. We analysed periods of co-rotating interaction regions(CIR) occurring as a result of the interaction of high speed solar wind streams emanating from coronal holes. We utilised the superposed epoch analysis method to investigate the absorption signature during these events. We identified periods of maximum CNA enhancement for each of these events and the duration of elevated CNA. Each of these events show differing CNA enhancement periods and elevation thresholds.