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New Results of Investigations of Whistler-mode Chorus Emissions : Volume 15, Issue 4 (30/07/2008)

By Santolík, O.

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Book Id: WPLBN0003987165
Format Type: PDF Article :
File Size: Pages 10
Reproduction Date: 2015

Title: New Results of Investigations of Whistler-mode Chorus Emissions : Volume 15, Issue 4 (30/07/2008)  
Author: Santolík, O.
Volume: Vol. 15, Issue 4
Language: English
Subject: Science, Nonlinear, Processes
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
2008
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

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Santolík, O. (2008). New Results of Investigations of Whistler-mode Chorus Emissions : Volume 15, Issue 4 (30/07/2008). Retrieved from http://hawaiilibrary.net/


Description
Description: Institute of Atmospheric Physics, Prague and Charles University, Prague, Czech Republic. This review summarizes selected recent results obtained during investigation of whistler-mode chorus emissions in the Earth's magnetosphere. Special attention is paid to results published during the last five years, with a focus on the results of the CLUSTER project. The nonlinear nature of chorus emissions is demonstrated using both theoretical results and measurements. Selected areas of research on whistler-mode chorus are covered and the paper especially reports new results on substructure and amplitudes of chorus wave packets, on new observations of frequency differences of chorus wave packets at different points in space and on their possible interpretations, on results concerning determination of position and size of the source region of chorus, on recent observational and theoretical results which lead to improved description of propagation of chorus from its source, and, finally, on comparison of chorus measurements with corresponding values deduced from nonlinear theory and simulations.

Summary
New results of investigations of whistler-mode chorus emissions

Excerpt
Bortnik, J., Thorne, R M., Meredith, N P., and Santolik, O.: Ray tracing of penetrating chorus and its implications for the radiation belts, Geophys. Res. Lett., 34, L15109, doi:10.1029/2007GL030040, 2007.; Bortnik, J., Thorne, R M., and Meredith, N P.: The unexpected origin of plasmaspheric hiss from discrete chorus emissions, Nature, 452, 62–66, doi:10.1038/nature06741, 2008.; Breneman, A W., Kletzing, C A., Chum, J., and Santolik, O.: Multi-Spacecraft Observations of Chorus Dispersion and Source Location, J. Geophys. Res., 112, A05221, doi:10.1029/2006JA012058, 2007.; Burtis, W J. and Helliwell, R A.: Magnetospheric chorus: Occurrence patterens and normalized frequency, Planet. Space Sci., 24, 1007–1024, 1976.; Burton, R K.: Critical electron pitch angle anisotropy necessary for chorus generation, J. Geophys. Res., 81, 4779–4781, 1976.; Burton, R K. and Holzer, R E.: The origin and propagation of chorus in the outer magnetosphere, J. Geophys. Res., 79, 1014–1023, 1974.; Albert, J M.: Efficient approximations of quasi-linear diffusion coefficients in the radiation belts, J. Geophys. Res., 113, A06208, doi:10.1029/2007JA012936, 2008.; Anderson, R R. and Maeda, K.: VLF emissions associated with enhanced magnetospheric electrons, J. Geophys. Res., 82, 135–146, 1977.; Andronov, A A. and Trakhtengerts, V Y.: Kinetic instability of the Earth's outer radiation belt, Geomagnetism and Aeronomy, 4, 233–242, 1964.; Bell, T F.: The nonlinear gyroresonance interaction between energetic electrons and coherent VLF waves propagating at an arbitrary angle with respect to the earth's magnetic field, J. Geophys. Res., 89, 905–918, 1984.; Bell, T F.: The wave magnetic field amplitude threshold for nonlinear trapping of energetic gyroresonant and Landau resonant \mboxelectrons by nonducted VLF waves in the magnetosphere, J. Geophys. Res., 91, 4365–4379, 1986.; Bortnik, J., Inan, U S., and Bell, T F.: Landau damping and resultant unidirectional propagation of chorus waves, Geophys. Res. Lett., 33, L03102, doi:10.1029/2005GL024553, 2006.; Cattell, C., Wygant, J R., Goetz, K., Kersten, K., Kellogg, P J., von Rosenvinge, T., Bale, S D., Roth, I., Temerin, M., Hudson, M K., Mewaldt, R A., Wiedenbeck, M., Maksimovic, M., Ergun, R., Acuna, M., and Russell, C T.: Discovery of very large amplitude whistler-mode waves in Earth’s radiation belts, Geophys. Res. Lett., 35, L01105, doi:10.1029/2007GL032009, 2008.; Chen, Y., Reeves, G D., and Friedel, R. H W.: The energization of relativistic electrons in the outer Van Allen radiation belt, Nature Phys., 3, 614–617, 2007.; Chum, J. and Santolík, O.: Propagation of whistler-mode chorus to low altitudes: divergent ray trajectories and ground accessibility, Ann. Geophys., 23, 3727–3738, 2005.; Chum, J., Santolik, O., Breneman, A W., Kletzing, C A., Gurnett, D A., and Pickett, J S.: Chorus source properties that produce time shifts and frequency range differences observed on different Cluster spacecraft, J. Geophys. Res., 112, A06206, doi:10.1029/2006JA012061, 2007.; Cornilleau-Wehrlin, N., Etcheto, J., and Burton, R K.: Detailed analysis of magnetospheric ELF chorus: Preliminary results, J. Atmos. Terr. Phys., 38, 1201–1210, 1976.; Cornilleau-Wehrlin, N., Gendrin, R., Lefeuvre, F., Parrot, M., Grard, R., Jones, D., Bahnsen, A., Ungstrup, E., and Gibbons, W.: VLF electromagnetic waves observed onboard GEOS-1, Space Sci. Rev., 22, 371–382, 1978.; Cornilleau-Wehrlin, N., Chanteur, G., Perraut, S., Rezeau, L., Robert, P., Roux, A., Villedary, C D., Canu, P., Maksimovic, M., Conchy, Y D., Hubert, D., Lacombe, C., Lefeuvre, F., Parrot, M., Pincon, J.-L., Decrau, P., Harvey, C C., Louarn, P., Santolik, O., Alleyne, H. S C., Roth, M., et al.: First results obtained by the Cluster STAFF experiment, Ann. Geophys., 21, 437–456, 2003.; Décréau, P. M E., Fergeau, P., Krasnoselskikh, V., Guirriec, E L., Lévêque, M., Martin, P., Randriamboarison, O., Rauch, J L., Sené, F X., Séran, H C., Trotignon, J G., Canu, P., Cornilleau

 

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