Correspondence between a plasma-based EMIC wave proxy and subauroral proton precipitation

Details Correspondence between a plasma-based EMIC wave proxy and subauroral proton precipitation Correspondence between a plasma-based EMIC wave proxy and subauroral proton precipitation

Dec 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011georl..3823102s&link_type=abstract

Geophysical Research Letters, Volume 38, Issue 23, CiteID L23102

Physics

Magnetospheric Physics: Energetic Particles: Precipitating, Magnetospheric Physics: Plasmasphere, Magnetospheric Physics: Plasma Waves And Instabilities (2471), Magnetospheric Physics: Radiation Belts, Magnetospheric Physics: Ring Current

Scientific paper

The loss of relativistic electrons from the Earth's radiation belts as a result of resonant interactions with electromagnetic ion cyclotron waves (EMIC) waves has yet to be fully quantified, in part, due to the lack of global measurements of the wave distribution during individual storm events. Recent work has focused on augmenting direct wave measurements with proxy wave indicators. Here we compare two different techniques for inferring the presence of EMIC waves: 1) a wave-growth proxy and amplitude estimate based on in situ plasma measurements of the cold and hot ion distributions, and 2) FUV observations of subauroral proton precipitation, which is thought to result from interactions with EMIC waves. For two event intervals, we show good correspondence between proxy predictions of wave growth, calculated using measurements from geostationary spacecraft, and precipitation observed at the northern hemisphere ionospheric footprint. Further, for times when the proxy is positive, we observe a moderate positive correlation (r = 0.56) between the predicted wave amplitude and the mean FUV brightness in a 300-km circle about the footprint. Further development and verification of these techniques will enhance our ability to infer the global distribution of EMIC waves when direct measurements are not available.

Affiliated with

Also associated with

No associations

Rating

Correspondence between a plasma-based EMIC wave proxy and subauroral proton precipitation does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Correspondence between a plasma-based EMIC wave proxy and subauroral proton precipitation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Correspondence between a plasma-based EMIC wave proxy and subauroral proton precipitation will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1608719