magnetopause reconnection across wide local time

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ID: 219840
2011
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Abstract
During April to July 2007 a combination of 10 spacecraft provided simultaneous monitoring of the dayside magnetopause across a wide range of local times. The array of four Cluster spacecraft, separated at large distances (10 000 km), were traversing the dawn-side magnetopause at high and low latitudes; the five THEMIS spacecraft were often in a 4 + 1 grouped configuration, traversing the low latitude, dusk-side magnetosphere, and the Double star, TC-1 spacecraft was in an equatorial orbit between the local times of the THEMIS and Cluster orbits. We show here a number of near simultaneous conjunctions of all 10 spacecraft at the magnetopause. One conjunction identifies an extended magnetic reconnection X-line, tilted in the low latitude, sub-solar region, which exists together with active anti-parallel reconnection sites extending to locations on the dawn-side flank. Oppositely moving FTE's are observed on all spacecraft, consistent with the initially strong IMF By conditions and the comparative locations of the spacecraft both dusk-ward and dawn-ward of noon. Comparison with other conjunctions of magnetopause crossings, which are also distributed over wide local times, supports the result that reconnection activity may occur at many sites simultaneously across the sub-solar and flank magnetopause, but linked to the large scale (extended) configuration of the merging line; broadly depending on IMF orientation. The occurrence of MR therefore inherently follows a "component" driven scenario irrespective of the guide field conditions. Some conjunctions allow the global magnetopause response to IMF changes to be observed and the distribution of spacecraft can directly confirm its shape, motion and deformation at local noon, dawn and dusk-side, simultaneously.
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dunlop2011annalesmagnetopause Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;M. W. Dunlop;M. W. Dunlop;M. W. Dunlop;Q.-H. Zhang;Y. V. Bogdanova;K. J. Trattner;Z. Pu;H. Hasegawa;J. Berchem;M. G. G. T. Taylor;M. Volwerk;J. P. Eastwood;B. Lavraud;C. Shen;J.-K. Shi;J. Wang;D. Constantinescu;A. N. Fazakerley;H. Frey;D. Sibeck;P. Escoubet;J. A. Wild;Z. X. Liu;C. Carr
Journal journal of food measurement and characterization
Year 2011
DOI
10.5194/angeo-29-1683-2011
URL
https://www.ann-geophys.net/29/1683/2011/angeo-29-1683-2011.pdf
Keywords
cosmic physics sciencephysicsgeophysics

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