Change search
ReferencesLink to record
Permanent link

Direct link
Estimates of terms in Ohm's law during an encounter with an electron diffusion region
Show others and affiliations
2016 (English)In: Geophysical Research Letters, ISSN 0094-8276, E-ISSN 1944-8007, Vol. 43, no 12, 5918-5925 p.Article in journal (Refereed) Published
Abstract [en]

We present measurements from the Magnetospheric Multiscale (MMS) mission taken during a reconnection event on the dayside magnetopause which includes a passage through an electron diffusion region (EDR). The four MMS satellites were separated by about 10 km such that estimates of gradients and divergences allow a reasonable estimate of terms in the generalized Ohm's law, which is key to investigating the energy dissipation during reconnection. The strength and character of dissipation mechanisms determines how magnetic energy is released. We show that both electron pressure gradients and electron inertial effects are important, but not the only participants in reconnection near EDRs, since there are residuals of a few mV/m (similar to 30-50%) of E + U-e x B (from the sum of these two terms) during the encounters. These results are compared to a simulation, which exhibits many of the observed features, but where relatively little residual is present.

Place, publisher, year, edition, pages
American Geophysical Union (AGU), 2016. Vol. 43, no 12, 5918-5925 p.
National Category
Geosciences, Multidisciplinary
URN: urn:nbn:se:kth:diva-192759DOI: 10.1002/2016GL069553ISI: 000380910100002OAI: diva2:974490

QC 20160926

Available from: 2016-09-26 Created: 2016-09-20 Last updated: 2016-09-26Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Lindqvist, P. -AMarklund, G.
By organisation
Space and Plasma Physics
In the same journal
Geophysical Research Letters
Geosciences, Multidisciplinary

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 3 hits
ReferencesLink to record
Permanent link

Direct link