2013
DOI: 10.5194/angeo-31-1779-2013
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Observational aspects of IMF draping-related magnetosheath accelerations for northward IMF

Abstract: Abstract. Acceleration of magnetosheath plasma resulting from the draping of the interplanetary magnetic field (IMF) around the magnetosphere can give rise to flow speeds that exceed that of the solar wind (V SW ) by up to ∼ 60 %. Three case event studies out of 34 identified events are described. We then present a statistical study of draping-related accelerations in the magnetosheath. Further, we compare the results with the recent theory of Erkaev et al. (2011Erkaev et al. ( , 2012. We present a methodology… Show more

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Cited by 5 publications
(8 citation statements)
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“…Spacecraft observations in the Earth's magnetosheath have provided evidence of such accelerated flows exceeding the solar wind speed near the flank magnetopause [e.g., Chen et al , ; Rosenqvist et al , ; Lavraud et al , , ; Harris et al , , and references therein]. In particular, Lavraud et al [] highlight that the position of the region of enhanced velocities is related to the orientation of the upstream magnetic field.…”
Section: Simulation 1: Magnetic Cloud With a Negligible Bx Componentmentioning
confidence: 99%
“…Spacecraft observations in the Earth's magnetosheath have provided evidence of such accelerated flows exceeding the solar wind speed near the flank magnetopause [e.g., Chen et al , ; Rosenqvist et al , ; Lavraud et al , , ; Harris et al , , and references therein]. In particular, Lavraud et al [] highlight that the position of the region of enhanced velocities is related to the orientation of the upstream magnetic field.…”
Section: Simulation 1: Magnetic Cloud With a Negligible Bx Componentmentioning
confidence: 99%
“…The topic of accelerated magnetosheath plasma by the draped magnetic field lines around the magnetosphere has recently received increased attention. This is due to advances made by global magnetohydrodynamic (MHD) modeling [Lavraud and Borovsky, 2008;Lavraud et al, 2007Lavraud et al, , 2013, semianalytic treatments, [Farrugia et al, 1995;Erkaev et al, 2011Erkaev et al, , 2012, as well as isolated but compelling observations [Rosenqvist et al, 2007;Lavraud et al, 2007;Harris et al, 2013]. These observations complement older observations returned by diverse spacecraft close to the magnetopause [Howe and Binsack, 1972;Chen et al, 1993;Petrinec and Russell, 1997].…”
Section: Introductionmentioning
confidence: 89%
“…The magnetosheath M , always larger than 1, is distributed uniformly within the range M ∈[1,4]. Supersonic plasma flows in the magnetosheath (in the already shocked plasma) can be explained by plasma acceleration by the Ampere force of draped and curved magnetic field lines in the nightside magnetosheath (e.g., Chen et al, ; Erkaev et al, ; Harris et al, ; Lavraud et al, , and references therein). The plasma sheet M , always less than 1, is distributed within the range M ∈[10 −2 ,1].…”
Section: Statistics Of Plasma Parameters Around the Boundary Layermentioning
confidence: 99%
“…Therefore, plasma appears to be basically demagnetized (even in the magnetosheath side where the plasma temperature is low). draped and curved magnetic field lines in the nightside magnetosheath (e.g., Chen et al, 1993;Erkaev et al, 2011;Harris et al, 2013;Lavraud et al, 2007, and references therein). The plasma sheet M, always less than 1, is distributed within the range M ∈ [10 −2 , 1].…”
Section: Statistics Of Plasma Parameters Around the Boundary Layermentioning
confidence: 99%