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The Statistical Studies of the Inner Boundary of Plasma Sheet : Volume 29, Issue 2 (08/02/2011)

By Cao, J. B.

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Book Id: WPLBN0003992130
Format Type: PDF Article :
File Size: Pages 10
Reproduction Date: 2015

Title: The Statistical Studies of the Inner Boundary of Plasma Sheet : Volume 29, Issue 2 (08/02/2011)  
Author: Cao, J. B.
Volume: Vol. 29, Issue 2
Language: English
Subject: Science, Annales, Geophysicae
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
2011
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

Citation

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Reme, H., Liu, Z. X., Dandouras, I., Dunlop, M., Ding, W. Z., Yang, J. Y., & Cao, J. B. (2011). The Statistical Studies of the Inner Boundary of Plasma Sheet : Volume 29, Issue 2 (08/02/2011). Retrieved from http://www.ebooklibrary.org/


Description
Description: Beijing University of Aeronautics and Astronautics, 100190, Beijing, China. The penetration of plasma sheet ions into the inner magnetosphere is very important to the inner magnetospheric dynamics since plasma sheet ions are one of the major particle sources of ring current during storm times. However, the direct observations of the inner boundary of the plasma sheet are fairly rare due to the limited number of satellites in near equatorial orbits outside 6.6 RE. In this paper, we used the ion data recorded by TC-1 from 2004 to 2006 to study the distribution of inner boundary of ion plasma sheet (IBIPS) and for the first time show the observational distribution of IBIPS in the equatorial plane. The IBIPS has a dawn-dusk asymmetry, being farthest to the Earth in the 06:00 08:00 LT bin and closest to the Earth in the 18:00–20:00 LT bin. Besides, the IBIPS has also a day-night asymmetry, which may be due to the fact that the ions on the dayside are exposed more time to loss mechanisms on their drift paths. The radial distance of IBIPS decrease generally with the increase of Kp index. The mean radial distance of IBIPS is basically larger than 6.6 RE during quiet times and smaller than 6.6 RE during active times. When the strength of convection electric field increases, the inward shift of IBIPS is most significant on the night side (22:00–02:00 LT). For Kp ≤ 0+, only 16% of IBIPSs penetrate inside the geosynchronous orbit. For 2 ≤ Kp < 3+, however, 70% of IBIPSs penetrate inside the geosynchronous orbit. The IBIPS has weak correlations with the AE and Dst indexes. The average correlation coefficient between Ri and Kp is −0.58 while the correlation coefficient between Ri and AE/Dst is only −0.29/0.17. The correlation coefficients are local time dependent. Particularly, Ri and Kp are highly correlated (r=−0.72) in the night sector, meaning that the radial distance of IBIPS Ri in the night sector has the good response to the Kp index These observations indicate that Kp plays a key role in determining the position of IBIPS.

Summary
The statistical studies of the inner boundary of plasma sheet

Excerpt
Carr, C., Brown, P., Zhang, T. L., Gloag, J., Horbury, T., Lucek, E., Magnes, W., O'Brien, H., Oddy, T., Auster, U., Austin, P., Aydogar, O., Balogh, A., Baumjohann, W., Beek, T., Eichelberger, H., Fornacon, K.-H., Georgescu, E., Glassmeier, K.-H., Ludlam, M., Nakamura, R., and Richter, I.: The Double Star magnetic field investigation: instrument design, performance and highlights of the first year's observations, Ann. Geophys., 23, 2713–2732, doi:10.5194/angeo-23-2713-2005, 2005.; Dandouras, I., Cao, J. B., and Vallat, C.: Energetic ion dynamics of the inner magnetosphere revealed in coordinated Cluster-Double Star observations, J. Geophys. Res., 114, A01S90, doi:10.1029/2007JA012757, 2009a.; Dandouras, I., Rème, H., Cao, J. B., and Escoubet, P.: Magnetosphere response to the 2005 and 2006 extreme solar events as observed by the Cluster and Double Star spacecraft, Adv. Space Res., , 43(4), 618–623, 2009b.; Denton, M. H., Thomsen, M. F., Korth, H., Lynch, S., Zhang, J. C., and Liemohn, M. W.: Bulk plasma properties at geosynchronous orbit, J. Geophys. Res., 110, A07223, doi:10.1029/2004JA010861, 2005.; Denton, M. H., Thomsen, M. F., Lavraud, B., Henderson, M. G., Skoug, R. M., Funsten, H. O., Jahn, J. M., Pollock, C. J., and Weygand, J. M.: Transport of plasma sheet material to the inner magnetosphere, Geophys. Res. Lett., 34, L04105, doi:10.1029/2006GL027886, 2007.; Ding, W. Z., Cao, J. B., Zeng, L., Wang, Y., and Yang, J. Y.: Simulation studies of plasma sheet ion boundary, Chinese Journal of Geophysics, 53, 1505–1514, 2010.; Korth, H., Thomsen, M. F., Borovsky, J. E., and McComas, D. J.: Plasma sheet access to geosynchronous orbit, J. Geophys. Res., 104, 25047–25061, 1999.; Birn, J., Thomsen, M. F., Borovsky, J. E., Reeves, G. D., McComas, D. J., and Belian, R. D.: Characteristic plasma properties during dispersionless substorm injections at geosynchronous orbit, J. Geophys. Res., 102, 2309–2324, 1997.; Borovsky, J. E., Thomsen, M. F., Elphic, R. C., Cayton, T. E., and McComas, D. J.: The transport of plasma sheet material from the distant tail to geosynchronous orbit, J. Geophys. Res., 103, 20297–20331, 1998.; Chen, M. W., Lyons, L. R., and Schulz, M.: Simulations of phase space distributions of storm time proton ring current, J. Geophys. Res., 99, 5745–5759, 1994.; Ebihara, Y., Fok, M.-C., Sazykin, S., Thomsen, M. F., Hairston, M. R., Evans, D. S., Rich, F. J., and Ejiri, M.: Ring current and the magnetosphere-ionosphere coupling during the superstorm of 20 November 2003. J. Geophys. Res., 110, A09S22, doi:10.1029/2004JA010924, 2005.; Fok, M.-C., Moore, T. E., and Greenspan, M. E.: Ring current development during storm main phase, J. Geophys. Res., 101, 15311–15322, 1996.; Friedel, R. H. W., Korth, H., Henderson, H. G., Thomsen, M. F. and Scudder, J. D.: Plasma sheet access to the inner magnetosphere, J. Geophys. Res., 106, 5845–5858, doi:10.1029/2000JA003011, 2001.; Ganushkina, N. Yu., Pulkkinen, T. I., Sergeev, V. A., Kubyshkina, M. V., Baker, D. N., Turner, N. E., Grande, M., Kellett, B., Fennell, J., Roeder, J., Sauvaud, J.-A., and Fritz, T. A.: Entry of plasma sheet particles into the inner magnetosphere as observed by Polar/CAMMICE, J. Geophys. Res., 105, 25205–25219, doi:10.1029/2000JA900062, 2000.; Ganushkina, N. Y., Pulkkinen, T. I., Bashkirov, V. F., Baker, D. N., and Li, X.: Formation of intense nose structures, Geophys. Res. Lett., 28(3), 491–494, doi:10.1029/2000GL011955, 2001.; Ganushkina, N. Yu., Pulkkinen

 

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