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Remote Estimation of Reconnection Parameters in the Earth's Magnetotail: Model and Observations : Volume 30, Issue 12 (20/12/2012)

By Alexandrova, A.

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Book Id: WPLBN0004002108
Format Type: PDF Article :
File Size: Pages 15
Reproduction Date: 2015

Title: Remote Estimation of Reconnection Parameters in the Earth's Magnetotail: Model and Observations : Volume 30, Issue 12 (20/12/2012)  
Author: Alexandrova, A.
Volume: Vol. 30, Issue 12
Language: English
Subject: Science, Annales, Geophysicae
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Historic
Publication Date:
2012
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

Citation

APA MLA Chicago

Kubyshkin, I. V., Semenov, V. S., Panov, E. V., Nakamura, R., Mcfadden, J. P., Apatenkov, S.,...Biernat, H. (2012). Remote Estimation of Reconnection Parameters in the Earth's Magnetotail: Model and Observations : Volume 30, Issue 12 (20/12/2012). Retrieved from http://worldpubliclibrary.org/


Description
Description: Space Research Institute, Austrian Academy of Sciences, Graz, Austria. We develop a method to estimate the reconnected magnetic flux and the location of the reconnection site using properties of magnetic field and plasma velocity disturbances in the regions surrounding the reconnection plasma flow. Our analysis is based on a 3-D non-steady reconnection model with a finite-sized X-line length. In this framework, we obtain a system of equations capturing the relationships between the disturbances of the magnetic field and plasma flow from one side and the reconnection characteristics from another side. These equations allow us to determine the reconnection characteristics from one-point remote observations of the reconnection fast flow, propagated in the magnetotail current sheet. We apply the model to magnetic field and plasma observations at (−43, −11.2, −6.9) RE GSM obtained by the THEMIS/ARTEMIS spacecraft, located in the tail lobe during a substorm event. We found that the reconnection region was located at ~ (−27, 3.5, 0) RE GSM. The X-line appeared to be close to the local time of the substorm current wedge identified from ground-based observations. We estimated the total magnetic flux, which was reconnected in the event as ~5 MWb. That corresponds to a small fraction of the total amount of magnetic flux transferred during a substorm.

Summary
Remote estimation of reconnection parameters in the Earth's magnetotail: model and observations

Excerpt
Amm, O., Donovan, E. F., Frey, H., Lester, M., Nakamura, R., Wild, J. A., Aikio, A., Dunlop, M., Kauristie, K., Marchaudon, A., McCrea, I. W., Opgenoorth, H.-J., and Strømme, A.: Coordinated studies of the geospace environment using Cluster, satellite and ground-based data: an interim review, Ann. Geophys., 23, 2129–2170, doi:10.5194/angeo-23-2129-2005, 2005.; Angelopoulos, V.: The THEMIS mission, Space Sci. Rev., 141, 534, doi:10.1007/s11214-008-9336-1, 2008.; Angelopoulos, V., Baumjohann, W., Kennel, C. F., Coroniti, F. V., Kivelson, M. G., Pellat, R., Walker, R. J., Lühr, H., and Paschmann, G.: Bursty bulk flows in the inner central plasma sheet, J. Geophys. Res., 97, 4027–4039, 1992.; Angelopoulos, V., Phan, T. D., Larson, D. E., Mozer, F. S., Lin, R. P., Tsuruda, K., Hayakawa, H., Mukai, T., Kokubun, S., Yamamoto, T., Williams, D. J., McEntire, R. W., Lepping, R. P., Parks, G. K., Brittnacher, M., Germany, G., Spann, J., Singer, H. J., and Yumoto, K.: Magnetotail flow bursts: association to global magnetospheric circulation, relationship to ionospheric activity and direct evidence for localization, Geophys. Res. Lett., 24, 2271–2274, 1997.; Auster, H. U., Glassmeier, K. H., Magnes, W., Aydogar, O., Baumjohann, W., Constantinescu, D., Fischer, D., Fornacon, K. H., Georgescu, E., Harvey, P., Hillenmaier, O., Kroth, R., Ludlam, M., Narita, Y., Nakamura, R., Okrafka, K., Plaschke, F., Richter, I., Schwarzl, H., Stoll, B., Valavanoglou, A., and Wiedemann, M.: The THEMIS Fluxgate Magnetometer, Space Sci. Rev., 141, 235–264, doi:10.1007/s11214-008-9365-9, 2008.; Baumjohann, W., Paschmann, G., and Lühr, H.: Characteristics of high-speed flows in the plasma sheet, J. Geophys. Res., 95, 3801–3809, 1990.; Baumjohann, W., Hesse, M., Kokubun, S., Mukai, T., Nagai, T., and Petrukovich, A. A.: Substorm dipolarization and recovery, J. Geophys. Res., 104, 24995–25000, 1999.; Biernat, H. K., Heyn, M. F., and Semenov, V. S.: Unsteady Petschek reconnection, J. Geophys. Res., 92, 3392–3396, 1987.; Brittnacher, M., Fillingim, M., Parks, G., Germany, G., and Spann, J.: Polar cap area and boundary motion during substorms, J. Geophys. Res., 104, 12251–12262, 1999.; DeJong, A. D., Cai, X., Clauer, R. C., and Spann, J. F.: Aurora and open magnetic flux during isolated substorms, sawteeth, and SMC events, Ann. Geophys., 25, 1865–1876, doi:10.5194/angeo-25-1865-2007, 2007.; Grocott, A., Yeoman, T. K., Nakamura, R., Cowley, S. W. H., Frey, H. U., Rème, H., and Klecker, B.: Multi-instrument observations of the ionospheric counterpart of a bursty bulk flow in the near-Earth plasma sheet, Ann. Geophys., 22, 1061–1075, doi:10.5194/angeo-22-1061-2004, 2004.; Heyn, M. F. and Semenov, V. S.: Rapid reconnection in compressible plasma, Phys. Plasmas, 3, 2725–2741, 1996.; Hones, E. W.: Substorm processes in the magnetotail: Comments on On hot tenuous plasmas, fireballs, and boundary layers in the Earth's magnetotail by Frank et al., J. Geophys. Res., 82, 5633–5643, 1977.; Hones, E. W.: Transient phenomena in the magnetotail and their relation to substorms, Space Sci. Rev., 23, 3, 393–410, doi:10.1007/BF00172247, 1979.; Hones, E. W., Baker, D. N., Bame, S. J., Feldman, W. C., Gosling, J. T., McComas, D. J., Zwickl, R. D., Slavin, J. A., Smith, E. J., and Tsurutani, B. T.: Structure of the magnetotail at 220 Earth radii and its response to geomagnetic activity, Geophys. Res. Lett., 11, 5–7, 1984.; Horning, B. L., McPherron, R. L. and Jackson, D. D.: Application of linear inverse theory to a line current model of substorm current systems, J. Geophys. Res., 79, 5202

 

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