Vortex‐induced tearing mode instability as a source of flux transfer events

Pu, Z. Y.; Hou, P. T.; Liu, Z. X.

doi:10.1029/ja095ia11p18861

Cited by 33 publications

(23 citation statements)

References 22 publications

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“…This result shows that the FTEs observed in the low-latitude MP are not likely to be generated by the VIR scenario. This mechanism is shown to be more effective in the mid-and high-latitudes [7,24] .…”

Section: The Possible Mechanism Of the Observed Fte Generationmentioning

confidence: 91%

“…There have been many studies on observed features of FTEs (see, for example, the review by Elphic [3] ) and recent works are focusing more on the basic questions regarding their generation mechanisms. After the three widely accepted theoretical models of FTE formation, i.e., the multiple X-line reconnection (MXR) model [4] , the single X-line bursty reconnection (SXBR) model [5] and the vortex induced reconnection (VIR) model [6,7] , Raeder [8] successfully reproduced the forming process of FTEs during strong southward IMF with a global numerical simulation, showing that the FTEs are produced by the sequential generation of new X-lines, which leads to a modified form of dual or multiple X-line reconnection. Wang et al [9] investigated the dependence of Cluster FTEs on solar wind conditions between February 2001 and June 2003 and found the controlling efficiency of different IMF and solar wind parameters on the occurrence, separation time, peak-peak magnitude and dawn-dusk asymmetry.…”

Section: Introductionmentioning

confidence: 99%

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Coordinated Cluster/Double Star observations of dayside flux transfer events on 6 April 2004

Wang

Zhou

et al. 2008

Sci. China Ser. E-Technol. Sci.

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With the Double Star Program TC1 in the equatorial orbit and Cluster tetrahedron in the high latitude polar orbit, a conjunct observation of FTEs on the dayside magnetopause (MP) on April 6, 2004 is presented in this study. The FTEs observed by TC1 at low latitudes are characterized to be generated in the subsolar region and the obtained flux tube axes orientate along the predicted low latitude component magnetic reconnection X-line, indicating that these FTEs were more likely to be generated through multiple X-line reconnection or single X-line bursty reconnection. During the same period, Cluster also encountered a series of magnetosheath FTEs with their axes pointing roughly along the interplanetary magnetic field. At last, the global FTE configuration is obtained from observations in different locations, which is in good agreement with the "elbow shape" model.

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Section: The Possible Mechanism Of the Observed Fte Generationmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Coordinated Cluster/Double Star observations of dayside flux transfer events on 6 April 2004

Wang

Zhou

et al. 2008

Sci. China Ser. E-Technol. Sci.

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“…How do the field and flow patterns of these structures vary when the sheared flows become stronger and not negligible? To find out the answer to this question we perform a two step simulation study (Pu et al, 1990b): first we run the code by setting V 0 = 0 and obtain the results similar to those shown in Figure la, then we take the obtained island and vortex as initial perturbations to run the VR code with a flow shear which increases linearly with time during 0<t<40, reaching DV at t = 40, and then stop increasing after t = 40. It is found that, as the flow shear enhances, magnetic field lines tend to be parallel to the streamlines rather quickly; meanwhile, the magnetic island and vortex gradually become concentric.…”

Section: The Evolution Of the Moving Reconnected Structurementioning

confidence: 95%

Simulation Studies of High-Latitude Magnetospheric Boundary Dynamics

Shi

Zhang

et al. 2005

Surv Geophys

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Magnetic reconnection at the high-latitude magnetopause is studied using 2-1/2-dimensional (2)1/2-D) Hall-MHD simulation. Concentric flow vortices and magnetic islands appear when both Hall effect and sheared flow are considered. Plasma mixing across the magnetopause occurs in the presence of the flow vortices. Reconnected structure generated in the vicinity of the subsolar point changes its geometry with increasing flow shear while moving to high latitudes. In the presence of flow shear, with the Hall-MHD reconnection a higher reconnection rate than with the traditional MHD is obtained. The out-of-plane components of flow and magnetic field produced by the Hall current are redistributed under the action of the flow shear, which makes the plasma transport across the boundaries more complicated. The simulation results provide some help in understanding the dynamic processes at the high-latitude magnetopause.

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“…Continuous reconnection can be triggered at single X point, while situations become complicated for FTEs. As we know, several mechanisms such as Multiple X line Reconnection (MXR) model [Lee and Fu, 1985], Vortex-Induced Reconnection (VIR) model [Pu et al, 1990, Liu andHu, 1988], and Bursty Single X Line Reconnection (BSXR) model [Scholer, 1988], etc., have been put forward to explain the formation of FTEs. In MXR model, Lee and Fu [1986] argued that the processes in multiple X line reconnection need additional time to increase the ratio of the length of current sheet to its width to higher value than that for the triggering of single X point.…”

Section: Discussionmentioning

confidence: 99%

Magnetopause response to variations in the solar wind: Conjunction observations between Cluster, TC-1, and SuperDARN

Zhang¹,

Shen²,

Liu³

et al. 2011

J. Geophys. Res.

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[1] How the solar wind affects the location of the magnetopause has been widely studied and excellent models of the magnetopause based on in situ observations in the solar wind and at the magnetopause have been established, while the careful insight into the responses of the magnetopause to the variations in the solar wind can still provide us some new information about the processes in space plasmas. The short distance from Cluster to TC-1 on 9 March 2004, between 06:10 and 08:10 UT, gives us a good opportunity to precisely monitor the responses of the magnetopause to the variations in the solar wind. On the basis of the combined observations between Cluster, TC-1, and SuperDARN we analyze the magnetopause crossings associated with magnetopause motion or magnetic reconnection when the solar wind conditions have a series of variations. New results about the time delays for the propagation from the solar wind monitor to the magnetopause of the interplanetary magnetic fields (IMF) and of the solar wind dynamic pressure, respectively, and the intrinsic time for reconnection onset at the magnetopause are obtained. The most important feature of the event is that the dynamic pressure and the IMF in the solar wind do not arrive at the magnetopause at the same time, which will direct us to find out how the variation in the solar wind dynamic pressure is transported from the bow shock to the magnetopause. Another significant feature is that this event presents a shorter intrinsic time, ∼2 min, for reconnection onset at the dayside magnetopause than that given by the previous work of Le et al. (1993) and Russell et al. (1997).

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Vortex‐induced tearing mode instability as a source of flux transfer events

Cited by 33 publications

References 22 publications

Coordinated Cluster/Double Star observations of dayside flux transfer events on 6 April 2004

Coordinated Cluster/Double Star observations of dayside flux transfer events on 6 April 2004

Simulation Studies of High-Latitude Magnetospheric Boundary Dynamics

Magnetopause response to variations in the solar wind: Conjunction observations between Cluster, TC-1, and SuperDARN

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