Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Oxygen ion response to proton bursty bulk flows
Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Space Technology.
Department of Physics, Umeå University.
Department of Physics, Umeå University.
Space and Plasma Physics, School of Electrical Engineering Royal Institute of Technology Stockholm.
Show others and affiliations
Number of Authors: 9
2016 (English)In: Journal of Geophysical Research - Space Physics, ISSN 2169-9380, E-ISSN 2169-9402, Vol. 121, no 8, 7535-7546 p.Article in journal (Refereed) Published
Abstract [en]

We have used Cluster spacecraft data from the years 2001 to 2005 to study how oxygen ions respond to bursty bulk flows (BBFs) as identified from proton data. We here define bursty bulk flows as periods of proton perpendicular velocities more than 100 km/s and a peak perpendicular velocity in the structure of more than 200 km/s, observed in a region with plasma beta above 1 in the near-Earth central tail region. We find that during proton BBFs only a minor increase in the O+ velocity is seen. The different behavior of the two ion species is further shown by statistics of H+ and O+ flow also outside BBFs: For perpendicular earthward velocities of H+ above about 100 km/s, the O+ perpendicular velocity is consistently lower, most commonly being a few tens of kilometers per second earthward. In summary, O+ ions in the plasma sheet experience less acceleration than H+ ions and are not fully frozen in to the magnetic field. Therefore, H+ and O+ motion is decoupled, and O+ ions have a slower earthward motion. This is particularly clear during BBFs. This may add further to the increased relative abundance of O+ ions in the plasma sheet during magnetic storms. The data indicate that O+ is typically less accelerated in association with plasma sheet X lines as compared to H+.

Place, publisher, year, edition, pages
2016. Vol. 121, no 8, 7535-7546 p.
National Category
Aerospace Engineering
Research subject
Atmospheric science
Identifiers
URN: urn:nbn:se:ltu:diva-6671DOI: 10.1002/2016JA022498ISI: 000385811500016Scopus ID: 2-s2.0-84982921091Local ID: 4ee022c2-ac91-4722-91de-f588b76fabfaOAI: oai:DiVA.org:ltu-6671DiVA: diva2:979557
Note

Validerad; 2016; Nivå 2; 2016-10-26 (inah)

Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2017-10-19Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full textScopus

Search in DiVA

By author/editor
Nilsson, HansSlapak, RikardSchillings, Audrey
By organisation
Space Technology
In the same journal
Journal of Geophysical Research - Space Physics
Aerospace Engineering

Search outside of DiVA

GoogleGoogle Scholar

Altmetric score

Total: 167 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf