Please use this identifier to cite or link to this item: http://localhost:80/handle/1956/3584
Title: Cluster observations of a field aligned current at the dawn flank of a bursty bulk flow
subject: Magnetospheric physics;VDP::Matematikk og Naturvitenskap: 400::Fysikk: 430::Rom- og plasmafysikk: 437
Publisher: European Geosciences Union
Description: This article describes observations of a bursty bulk flow (BBF) in the outer central plasma sheet. The observations are made with the Cluster satellites, located approximately 19RE downtail, close to the midnight sector in the Southern Hemisphere. 40–60 s after Cluster first detected the BBF, there was a large bipolar perturbation in the magnetic field. A Grad-Shafranov reconstruction has revealed that this is created by a field-aligned current at the flank of the BBF. Further analysis of the plasma moments has shown that the BBF has the properties of a depleted flux tube. Depleted flux tubes are an important theoretical model for how plasma and magnetic flux can be transported Earthward in the magnetotail as part of the Dungey cycle. The field aligned current is directed Earthward and is located at the dawn side of the BBF. Thus, it is consistent with the magnetic shear at the flank of an Earthward moving BBF. The total current has been estimated to be about 0.1 MA.
Peer reviewed
Published version
URI: http://localhost:80/handle/1956/3584
More Information: Annales Geophysicae 25(6): 1405-1415
http://www.ann-geophys.net/25/1405/2007/angeo-25-1405-2007.html
http://hdl.handle.net/1956/3584
Appears in Collections:Department of Earth Science

Files in This Item:
Click on the URI links for accessing contents.
Title: Cluster observations of a field aligned current at the dawn flank of a bursty bulk flow
subject: Magnetospheric physics;VDP::Matematikk og Naturvitenskap: 400::Fysikk: 430::Rom- og plasmafysikk: 437
Publisher: European Geosciences Union
Description: This article describes observations of a bursty bulk flow (BBF) in the outer central plasma sheet. The observations are made with the Cluster satellites, located approximately 19RE downtail, close to the midnight sector in the Southern Hemisphere. 40–60 s after Cluster first detected the BBF, there was a large bipolar perturbation in the magnetic field. A Grad-Shafranov reconstruction has revealed that this is created by a field-aligned current at the flank of the BBF. Further analysis of the plasma moments has shown that the BBF has the properties of a depleted flux tube. Depleted flux tubes are an important theoretical model for how plasma and magnetic flux can be transported Earthward in the magnetotail as part of the Dungey cycle. The field aligned current is directed Earthward and is located at the dawn side of the BBF. Thus, it is consistent with the magnetic shear at the flank of an Earthward moving BBF. The total current has been estimated to be about 0.1 MA.
Peer reviewed
Published version
URI: http://localhost:80/handle/1956/3584
More Information: Annales Geophysicae 25(6): 1405-1415
http://www.ann-geophys.net/25/1405/2007/angeo-25-1405-2007.html
http://hdl.handle.net/1956/3584
Appears in Collections:Department of Earth Science

Files in This Item:
Click on the URI links for accessing contents.
Title: Cluster observations of a field aligned current at the dawn flank of a bursty bulk flow
subject: Magnetospheric physics;VDP::Matematikk og Naturvitenskap: 400::Fysikk: 430::Rom- og plasmafysikk: 437
Publisher: European Geosciences Union
Description: This article describes observations of a bursty bulk flow (BBF) in the outer central plasma sheet. The observations are made with the Cluster satellites, located approximately 19RE downtail, close to the midnight sector in the Southern Hemisphere. 40–60 s after Cluster first detected the BBF, there was a large bipolar perturbation in the magnetic field. A Grad-Shafranov reconstruction has revealed that this is created by a field-aligned current at the flank of the BBF. Further analysis of the plasma moments has shown that the BBF has the properties of a depleted flux tube. Depleted flux tubes are an important theoretical model for how plasma and magnetic flux can be transported Earthward in the magnetotail as part of the Dungey cycle. The field aligned current is directed Earthward and is located at the dawn side of the BBF. Thus, it is consistent with the magnetic shear at the flank of an Earthward moving BBF. The total current has been estimated to be about 0.1 MA.
Peer reviewed
Published version
URI: http://localhost:80/handle/1956/3584
More Information: Annales Geophysicae 25(6): 1405-1415
http://www.ann-geophys.net/25/1405/2007/angeo-25-1405-2007.html
http://hdl.handle.net/1956/3584
Appears in Collections:Department of Earth Science

Files in This Item:
Click on the URI links for accessing contents.