Dayside Outer Zone (DOZ) Chorus at High Latitudes: Properties and Possible Role of Minimum B Pockets (Invited)

Details Dayside Outer Zone (DOZ) Chorus at High Latitudes: Properties and Possible Role of Minimum B Pockets (Invited) Dayside Outer Zone (DOZ) Chorus at High Latitudes: Properties and Possible Role of Minimum B Pockets (Invited)

Dec 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agufmsm44a..02t&link_type=abstract

American Geophysical Union, Fall Meeting 2009, abstract #SM44A-02

Physics

[2730] Magnetospheric Physics / Magnetosphere: Inner, [2772] Magnetospheric Physics / Plasma Waves And Instabilities

Scientific paper

Dayside outer zone (DOZ) chorus can have significant effects on magnetospheric energetic electrons. This is due to the high intensities of chorus elements and subelements, as well as the presence of low ambient magnetic field magnitudes in this region, particularly in minimum B pockets. Our understanding of this chorus is unfortunately limited at this time. Some pertinent questions are: What is the origin of the emission, gradient drifting substorm electrons, solar wind pressure fluctuations, or other possible mechanisms? What are the sources of low frequency (f < 0.15 fce) emissions? Are chorus emissions in the DOZ different from chorus detected near the equatorial plane? We are performing a team effort using Cluster, Polar and Geotail plasma wave data to study individual cases and also to perform statistical analyses. Although the above questions are broad and cannot be fully answered at this time, we will report the progress that we have made during the last year on this important topic.

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