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  • 1
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    Consequences of magnetohydrodynamic processes for large scale flow in the magnetosheath (1994)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: The remarkable success with which gas dynamic models characterize the plasma properties in the magnetosheath has to some degree diverted attention from certain inherently magnetohydrodynamic effects that are expected to introduce important modifications. Three recent aspects of magnetosheath observations: a slow mode structure near the subsolar point, flows at speeds in excess of the solar wind speed, and the shape of the internal boundary, i.e., the magnetopause, provide examples of inherently magnetohydrodynamic (MHD) effects.
    Keywords: GEOPHYSICS
    Type: Advances in Space Research (ISSN 0273-1177); 14; 7; p. (7)95-(7)104
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    On nonsinusoidal waves at the Earth's magnetopause (1993)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: We have examined International Sun Earth Explorer (ISEE) 1 and 2 data during an interval of multiple magnetopause crossings along the flanks of the tail on January 22, 1978. During the event the interplanetary magnetic field was mainly northward. We found that the surface waves on the magnetopause were nonsinusoidal with steepened sunward facing surfaces. This result is consistent with observations reported for an analogous event by Chen et al. (1993). The dawn-dusk electric field E in the low-latitude boundary layer was approx. 10 kV/R(sub E), which is much greater than the approx. 1 kV/R(sub E) dawn-dusk E field typical of the sunward convecting plasma sheet plasma. The ratio of the dawn-dusk E field in the LLBL to the dusk-dawn E in the magnetosheath was approx. 1/3. We propose that the magnetic field in the magnetosheath modulates the wave form in a way that may result in an anomalous transport of momentum across the magnetopause.
    Keywords: GEOPHYSICS
    Type: Geophysical Research Letters (ISSN 0094-8276); 20; 23; p. 2699-2702
    Format: text
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    NASA TECHNICAL REPORTS
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