Search: onr:"swepub:oai:DiVA.org:kth-292622" >
Comparative Analysi...
Comparative Analysis of the Various Generalized Ohm's Law Terms in Magnetosheath Turbulence as Observed by Magnetospheric Multiscale
-
- Stawarz, J. E. (author)
- Imperial Coll London, Dept Phys, London, England.
-
- Matteini, L. (author)
- Imperial Coll London, Dept Phys, London, England.
-
- Parashar, T. N. (author)
- Victoriz Univ Wellington, Sch Chem & Phys Sci, Wellington, New Zealand.;Univ Delaware, Dept Phys & Astron, Newark, DE 19716 USA.
-
show more...
-
- Franci, L. (author)
- Queen Mary Univ London, Dept Phys & Astron, London, England.
-
- Eastwood, J. P. (author)
- Imperial Coll London, Dept Phys, London, England.
-
- Gonzalez, C. A. (author)
- Univ Texas Austin, Dept Phys, Austin, TX 78712 USA.
-
- Gingell, I. L. (author)
- Univ Southampton, Sch Phys & Astron, Southampton, Hants, England.
-
- Burch, J. L. (author)
- Southwest Res Inst, San Antonio, TX USA.
-
- Ergun, R. E. (author)
- Univ Colorado, Dept Astrophys & Planetary Sci, Boulder, CO 80309 USA.;Univ Colorado, Lab Atmostpher & Space Phys, Boulder, CO 80309 USA.
-
- Ahmadi, N. (author)
- Univ Colorado, Lab Atmostpher & Space Phys, Boulder, CO 80309 USA.
-
- Giles, B. L. (author)
- NASA, Goddard Space Flight Ctr, Greenbelt, MD USA.
-
- Gershman, D. J. (author)
- NASA, Goddard Space Flight Ctr, Greenbelt, MD USA.
-
- Le Contel, O. (author)
- Univ Paris Saclay, Sorbonne Univ, Ecole Polytech, Lab Phys Plasmas,CNRS, Paris, France.
-
- Lindqvist, Per-Arne (author)
- KTH,Rymd- och plasmafysik
-
- Russell, C. T. (author)
- Univ Calif Los Angeles, Dept Earth Planetary & Space Sci, Los Angeles, CA USA.
-
- Strangeway, R. J. (author)
- Univ Calif Los Angeles, Dept Earth Planetary & Space Sci, Los Angeles, CA USA.
-
- Torbert, R. B. (author)
- Univ New Hampshire, Dept Phys, Durham, NH 03824 USA.
-
show less...
-
Imperial Coll London, Dept Phys, London, England Victoriz Univ Wellington, Sch Chem & Phys Sci, Wellington, New Zealand.;Univ Delaware, Dept Phys & Astron, Newark, DE 19716 USA. (creator_code:org_t)
- American Geophysical Union (AGU), 2021
- 2021
- English.
-
In: Journal of Geophysical Research - Space Physics. - : American Geophysical Union (AGU). - 2169-9380 .- 2169-9402. ; 126:1
- Related links:
-
https://doi.org/10.1...
-
show more...
-
https://urn.kb.se/re...
-
https://doi.org/10.1...
-
show less...
Abstract
Subject headings
Close
- Decomposing the electric field (E) into the contributions from generalized Ohm's law provides key insight into both nonlinear and dissipative dynamics across the full range of scales within a plasma. Using high-resolution, multispacecraft measurements of three intervals in Earth's magnetosheath from the Magnetospheric Multiscale mission, the influence of the magnetohydrodynamic, Hall, electron pressure, and electron inertia terms from Ohm's law, as well as the impact of a finite electron mass, on the turbulent E spectrum are examined observationally for the first time. The magnetohydrodynamic, Hall, and electron pressure terms are the dominant contributions to E over the accessible length scales, which extend to scales smaller than the electron gyroradius at the greatest extent, with the Hall and electron pressure terms dominating at sub-ion scales. The strength of the nonideal electron pressure contribution is stronger than expected from linear kinetic Alfven waves and a partial antialignment with the Hall electric field is present, linked to the relative importance of electron diamagnetic currents in the turbulence. The relative contribution of linear and nonlinear electric fields scale with the turbulent fluctuation amplitude, with nonlinear contributions playing the dominant role in shaping E for the intervals examined in this study. Overall, the sum of the Ohm's law terms and measured E agree to within similar to 20% across the observable scales. These results both confirm general expectations about the behavior of E in turbulent plasmas and highlight features that should be explored further theoretically.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Keyword
- Earth&apos
- s magnetosheath
- electric field
- generalized Ohm&apos
- s law
- Magnetospheric Multiscale
- turbulence
Publication and Content Type
- ref (subject category)
- art (subject category)
Find in a library
To the university's database
- By the author/editor
-
Stawarz, J. E.
-
Matteini, L.
-
Parashar, T. N.
-
Franci, L.
-
Eastwood, J. P.
-
Gonzalez, C. A.
-
show more...
-
Gingell, I. L.
-
Burch, J. L.
-
Ergun, R. E.
-
Ahmadi, N.
-
Giles, B. L.
-
Gershman, D. J.
-
Le Contel, O.
-
Lindqvist, Per-A ...
-
Russell, C. T.
-
Strangeway, R. J ...
-
Torbert, R. B.
-
show less...
- About the subject
-
- NATURAL SCIENCES
-
NATURAL SCIENCES
-
and Physical Science ...
-
and Astronomy Astrop ...
- Articles in the publication
-
Journal of Geoph ...
- By the university
-
Royal Institute of Technology