Sökning: WFRF:(Turc L.) >
Three-dimensional c...
-
Palin, LaurianneUppsala universitet,Institutet för rymdfysik, Uppsalaavdelningen
(författare)
Three-dimensional current systems and ionospheric effects associated with small dipolarization fronts
- Artikel/kapitelEngelska2015
Förlag, utgivningsår, omfång ...
Nummerbeteckningar
-
LIBRIS-ID:oai:DiVA.org:uu-269776
-
https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-269776URI
-
https://doi.org/10.1002/2015JA021040DOI
Kompletterande språkuppgifter
-
Språk:engelska
-
Sammanfattning på:engelska
Ingår i deldatabas
Klassifikation
-
Ämneskategori:ref swepub-contenttype
-
Ämneskategori:art swepub-publicationtype
Anmärkningar
-
We present a case study of eight successive plasma sheet (PS) activations (usually referred to as bursty bulk flows or dipolarization fronts), associated with small individual B-ZGSM increases on 31 March 2009 (0200-0900 UT), observed by the Time History of Events and Macroscale Interactions During Substorms mission. This series of events happens during very quiet solar wind conditions, over a period of 7 h preceding a substorm onset at 1230 UT. The amplitude of the dipolarizations increases with time. The low-amplitude dipolarization fronts are associated with few (1 or 2) rapid flux transport events (RFT, E-h > 2 mV/m), whereas the large-amplitude ones encompass many more RFT events. All PS activations are associated with small and localized substorm current wedge (SCW)-like current system signatures, which seems to be the consequence of RFT arrival in the near tail. The associated ground magnetic perturbations affect a larger part of the contracted auroral oval when, in the magnetotail, more RFT are embedded in PS activations (> 5). Dipolarization fronts with very low amplitude, a type usually not included in statistical studies, are of particular interest because we found even those to be associated with clear small SCW-like current system and particle injections at geosynchronous orbit. This exceptional data set highlights the role of flow bursts in the magnetotail and leads to the conclusion that we may be observing the smallest form of a substorm or rather its smallest element. This study also highlights the gradual evolution of the ionospheric current disturbance as the plasma sheet is observed to heat up.
Ämnesord och genrebeteckningar
Biuppslag (personer, institutioner, konferenser, titlar ...)
-
Jacquey, C.Univ Toulouse, CNRS, IRAP, Toulouse, France.
(författare)
-
Opgenoorth, HermannUppsala universitet,Institutet för rymdfysik, Uppsalaavdelningen(Swepub:uu)heropgen
(författare)
-
Connors, M.Athabasca Univ, Dept Phys, Edmonton, AB, Canada.
(författare)
-
Sergeev, V.St Petersburg State Univ, Dept Earths Phys, St Petersburg 199034, Russia.
(författare)
-
Sauvaud, J-A
(författare)
-
Nakamura, R.Austrian Acad Sci, Space Res Inst, A-8010 Graz, Austria.
(författare)
-
Reeves, G. D.Los Alamos Natl Lab, Los Alamos, NM USA.
(författare)
-
Singer, H. J.NOAA, Space Weather Predict Ctr, Boulder, CO USA.
(författare)
-
Angelopoulos, V.Univ Calif Los Angeles, Dept Earth Planetary & Space Sci, IGPP, Los Angeles, CA USA.
(författare)
-
Turc, L.European Space Res & Technol Ctr ESA, Directorate Sci & Robot Explorat, Sci Support Off, Noordwijk, Netherlands.
(författare)
-
Uppsala universitetInstitutet för rymdfysik, Uppsalaavdelningen
(creator_code:org_t)
Sammanhörande titlar
-
Ingår i:Journal of Geophysical Research - Space Physics120:5, s. 3739-37572169-93802169-9402
Internetlänk
Hitta via bibliotek
Till lärosätets databas
- Av författaren/redakt...
-
Palin, Laurianne
-
Jacquey, C.
-
Opgenoorth, Herm ...
-
Connors, M.
-
Sergeev, V.
-
Sauvaud, J-A
-
visa fler...
-
Nakamura, R.
-
Reeves, G. D.
-
Singer, H. J.
-
Angelopoulos, V.
-
Turc, L.
-
visa färre...
- Om ämnet
-
- NATURVETENSKAP
-
NATURVETENSKAP
-
och Fysik
-
och Fusion plasma oc ...
- Artiklar i publikationen
-
Journal of Geoph ...
- Av lärosätet
-
Uppsala universitet