Climatology of Pc 1-2 Waves Observed at High Latitudes in Antarctica: A Progress Report

Details Climatology of Pc 1-2 Waves Observed at High Latitudes in Antarctica: A Progress Report Climatology of Pc 1-2 Waves Observed at High Latitudes in Antarctica: A Progress Report

May 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agusmsm31b..02m&link_type=abstract

American Geophysical Union, Spring Meeting 2008, abstract #SM31B-02

Physics

2752 Mhd Waves And Instabilities (2149, 6050, 7836), 2788 Magnetic Storms And Substorms (7954)

Scientific paper

An increased occurrence of electromagnetic ion cyclotron (EMIC) waves in Earth's magnetosphere has long been noted during the aftermath of magnetic storms. Such waves, classified as Pc 1-2 waves (0.2 - 5 Hz), have been suggested in many theoretical and some observational studies as a significant loss mechanism for both ring current ions and, via parasitic interactions, radiation belt electrons. We have applied the automated wave analysis technique developed by Bortnik et al. [JGR A04204, 2007] to a large, multi-year suite of data from search coil magnetometers deployed at selected stations in Antarctica. These stations include Halley (L = 4.5), AGO A80 (L = 6.3), AGO A81 (L = 7.7), AGO P2 (L = 8.4), AGO P3 (L = 10.2), and South Pole Station (L = 13.6). Data from South Pole Station were recorded nearly continuously for over a solar cycle. Data from U. S. and British Automated Geophysical Observatories span over one solar cycle, but are not continuous at any given station throughout this period. Beginning with 2006 and 2007 data from Halley, we have at each station noted the mean frequency, amplitude, time, and duration of events. We have also parameterized the occurrence of these events according to UT, Kp, Dst, month, phase of magnetic storms, and phase of the solar cycle.

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