Auroral arc and oval electrodynamics in the Harang region (2009)
Marghitu, O., Karlsson, T., Klecker, B., Haerendel, G., McFadden, J.
Multipoint measurements from the four-satellite Cluster mission allow us to begin to resolve the dilemma of the spatio-temporal ambiguity associated with single-satellite measurements. We show...
Liléo, S., Marklund, G. T., Karlsson, T., Johansson, T., Marchaudon, A., ...
Results are presented from a case study of a plasma boundary crossing by the Cluster spacecraft during an extended period of high auroral activity. The boundary between the magnetotail lobe region of...
Liléo, S., Marklund, G. T., Karlsson, T., Johansson, T., Marchaudon, A., ...
Results are presented from a case study of a plasma boundary crossing by the Cluster spacecraft during an extended period of high auroral activity. The boundary between the magnetotail lobe region of...
Scale sizes of intense auroral electric fields observed by Cluster (2007)
Johansson, T., Marklund, G., Karlsson, T., Liléo, S., Nilsson, H., ...
The scale sizes of intense (>0.15 V/m, mapped to the ionosphere), high-altitude (4?7 RE geocentric distance) auroral electric fields (measured by the Cluster EFW instrument) have been determined in a...
Scale sizes of intense auroral electric fields observed by Cluster (2007)
Johansson, T., Marklund, G., Karlsson, T., Liléo, S., Nilsson, H., ...
The scale sizes of intense (>0.15 V/m, mapped to the ionosphere), high-altitude (4?7 RE geocentric distance) auroral electric fields (measured by the Cluster EFW instrument) have been determined in a...
On the profile of intense high-altitude auroral electric fields at magnetospheric boundaries (2006)
Johansson, T., Marklund, G., Karlsson, T., Liléo, S., Marchaudon, A., ...
The profile of intense high-altitude electric fields on auroral field lines has been studied using Cluster data. A total of 41 events with mapped electric field magnitudes in the range between 0.51...
On the profile of intense high-altitude auroral electric fields at magnetospheric boundaries (2006)
Johansson, T., Marklund, G., Karlsson, T., Liléo, S., Marchaudon, A., ...
The profile of intense high-altitude electric fields on auroral field lines has been studied using Cluster data. A total of 41 events with mapped electric field magnitudes in the range between...
A statistical study of intense electric fields at 4?7 RE geocentric distance using Cluster (2005)
Johansson, T., Karlsson, T., Marklund, G., Figueiredo, S., Buchert, S.
Intense high-latitude electric fields (>150 mV/m mapped to ionospheric altitude) at 4?7 RE geocentric distance have been investigated in a statistical study, using data from the Cluster satellites....
Temporal and spatial evolution of discrete auroral arcs as seen by Cluster (2005)
Figueiredo, S., Marklund, G. T., Karlsson, T., Johansson, T., Ebihara, Y., Ejiri, M., ...
Two event studies are presented in this paper where intense convergent electric fields, with mapped intensities up to 1350 mV/m, are measured in the auroral upward current region by the Cluster...
A statistical study of intense electric fields at 4?7 RE geocentric distance using Cluster (2005)
Johansson, T., Karlsson, T., Marklund, G., Figueiredo, S., Buchert, S.
Intense high-latitude electric fields (>150 mV/m mapped to ionospheric altitude) at 4?7 RE geocentric distance have been investigated in a statistical study, using data from the Cluster satellites....
Temporal and spatial evolution of discrete auroral arcs as seen by Cluster (2005)
Figueiredo, S., Marklund, G. T., Karlsson, T., Johansson, T., Ebihara, Y., Ejiri, M., ...
Two event studies are presented in this paper where intense convergent electric fields, with mapped intensities up to 1350 mV/m, are measured in the auroral upward current region by the Cluster...
Greenhouse gas emissions from European croplands (2004)
Smith, P., Amézquita, M.C ., Buendia, L., Ewert, F., Kuikman, P.J., Leffelaar, P.A., ...
Greenhouse gas emissions from European croplands : CarboEurope GHG Specific Study Number 2 (2004)
Smith, P., Ambus, P., Amezquita, M. C., Andren, O., Arrouays, D., Ball, B., ...
Marklund, G. T., Karlsson, T., Figueiredo, S., Johansson, T., André, M., ...
Temporal and spatial characteristics of intense quasi-static electric fields and associated electric potential structures in the return current region are discussed using Cluster observations at...
Marklund, G. T., Karlsson, T., Figueiredo, S., Johansson, T., André, M., ...
Temporal and spatial characteristics of intense quasi-static electric fields and associated electric potential structures in the return current region are discussed using Cluster observations at...
Olsson, A., Janhunen, P., Karlsson, T., Ivchenko, N., Blomberg, L. G.
We make a statistical study of ionospheric Joule heating with the Poynting flux method using six months of Astrid-2/EMMA electric and magnetic field data during 1999 (solar maximum year). For the...
Intense high-altitude auroral electric fields - temporal and spatial characteristics (2004)
Johansson, T., Figueiredo, S., Karlsson, T., Marklund, G., Fazakerley, A., Buchert, S., ...
Cluster electric field, magnetic field, and energetic electron data are analyzed for two events of intense auroral electric field variations, both encountered in the Plasma Sheet Boundary Layer...
Karlsson, T., Marklund, G. T., Figueiredo, S., Johansson, T., Buchert, S.
Cluster multipoint measurements of the electric and magnetic fields from a crossing of auroral field lines at an altitude of 4RE are used to show that it is possible to resolve the ambiguity of...
Figueiredo, S., Karlsson, T., Marklund, G. T.
Based on Astrid-2 satellite data, results are presented from a statistical study on subauroral ion drift (SAID) occurrence. SAID is a subauroral phenomenon characterized by a westward ionospheric ion...
EMMA - the Electric and Magnetic Monitor of the Aurora on Astrid-2 (2004)
Blomberg, L. G., Marklund, G. T., Primdahl, F., Brauer, P., Bylander, L., ...
The Astrid-2 mission has dual primary objectives. First, it is an orbiting instrument platform for studying auroral electrodynamics. Second, it is a technology demonstration of the feasibility of...
Olsson, A., Janhunen, P., Karlsson, T., Ivchenko, N., Blomberg, L. G.
We make a statistical study of ionospheric Joule heating with the Poynting flux method using six months of Astrid-2/EMMA electric and magnetic field data during 1999 (solar maximum year). For the...
Intense high-altitude auroral electric fields - temporal and spatial characteristics (2004)
Johansson, T., Figueiredo, S., Karlsson, T., Marklund, G., Fazakerley, A., Buchert, S., ...
Cluster electric field, magnetic field, and energetic electron data are analyzed for two events of intense auroral electric field variations, both encountered in the Plasma Sheet Boundary Layer...
Karlsson, T., Marklund, G. T., Figueiredo, S., Johansson, T., Buchert, S.
Cluster multipoint measurements of the electric and magnetic fields from a crossing of auroral field lines at an altitude of 4RE are used to show that it is possible to resolve the ambiguity of...
Figueiredo, S., Karlsson, T., Marklund, G. T.
Based on Astrid-2 satellite data, results are presented from a statistical study on subauroral ion drift (SAID) occurrence. SAID is a subauroral phenomenon characterized by a westward ionospheric ion...
EMMA - the Electric and Magnetic Monitor of the Aurora on Astrid-2 (2004)
Blomberg, L. G., Marklund, G. T., Primdahl, F., Brauer, P., Bylander, L., ...
The Astrid-2 mission has dual primary objectives. First, it is an orbiting instrument platform for studying auroral electrodynamics. Second, it is a technology demonstration of the feasibility of...
HE0107-5240, A Chemically Ancient Star.I. A Detailed Abundance Analysis (2003)
Christlieb, N., Gustafsson, B., Korn, A. J., Barklem, P. S., Beers, T. C., Bessell, M. S., ...
We report a detailed abundance analysis for HE0107-5240, a halo giant with [Fe/H]_NLTE=-5.3. This star was discovered in the course of follow-up medium-resolution spectroscopy of extremely metal-poor...
Marklund, G.T., Ivchenko, N., Karlsson, T., Fazakerley, A., Dunlop, M., ...
The bright night-time aurorae that are visible to the unaided eye are caused by electrons accelerated towards Earth by an upward-pointing electric field. On adjacent geomagnetic field lines the...
Gustafsson, G., André, M., Carozzi, T., Eriksson, A. I., Grard, R., ...
Highlights are presented from studies of the electric field data from various regions along the Cluster orbit. They all point towards a very high coherence for phenomena recorded on four spacecraft...
Eriksson, S., Blomberg, L. G., Ivchenko, N., Karlsson, T., Marklund, G. T.
The cross-polar potential drop ?pc and the low-latitude asymmetric geomagnetic disturbance field, as indicated by the mid-latitude ASY-H magnetic index, are used to study the average magnetospheric...
Marklund, G. T., Karlsson, T., Eglitis, P., Opgenoorth, H.
Results concerning the electrodynamics of the nightside auroral bulge are presented based on simultaneous satellite and ground-based observations. The satellite data include Astrid-2 measurements of...
Gustafsson, G., André, M., Carozzi, T., Eriksson, A. I., Grard, R., ...
Highlights are presented from studies of the electric field data from various regions along the Cluster orbit. They all point towards a very high coherence for phenomena recorded on four spacecraft...
Eriksson, S., Blomberg, L. G., Ivchenko, N., Karlsson, T., Marklund, G. T.
The cross-polar potential drop ?pc and the low-latitude asymmetric geomagnetic disturbance field, as indicated by the mid-latitude ASY-H magnetic index, are used to study the average magnetospheric...
Marklund, G. T., Karlsson, T., Eglitis, P., Opgenoorth, H.
Results concerning the electrodynamics of the nightside auroral bulge are presented based on simultaneous satellite and ground-based observations. The satellite data include Astrid-2 measurements of...
Brandrup-Wognsen, G., Berggren, H., Hartford, M., Hjalmarson, Å., Karlsson, T., Herlitz, J.
Objective To describe mortality and morbidity during a period of 2 years after coronary artery bypass grafting in relation to gender. Design Prospective follow-up study. Setting Two regional...
Bengtson, A., Karlsson, T., Hjalmarson, Å, Herlitz, J.
Aim To describe the occurrence of death, development of acute myocardial infarction and need for hospitalization among patients on the waiting list for coronary artery by pass grafting and...
HERLITZ, J., BÅNG, A., ISAKSSON, L., KARLSSON, T.
Background A large number of patients who call for an ambulance because of acute chest pain have an acute ischaemic event, but some do not. Aim To relate the ambulance despatcher's estimated severity...
HERLITZ, J., BÅNG, A., ISAKSSON, L., KARLSSON, T.
Background A large number of patients who call for an ambulance because of acute chest pain have an acute ischaemic event, but some do not. Aim To relate the ambulance despatcher's estimated severity...
LINDÉN, T., BONDJERS, G., KARLSSON, T., WIKLUND, O.
The influence of pre-operative serum lipid levels on late clinical outcome after coronary artery bypass surgery was analysed in 83 patients undergoing coronary bypass surgery for stable angina...
Serum lipids and lipoproteins in relation to restenosis after coronary angioplasty (1991)
Johansson, SR, Wiklund, O, Karlsson, T, Hjalmarson, A, Emanuelsson, H
Restenosis after coronary angioplasty (PTCA) is a major problem, limiting the long-term efficacy of the procedure. Lipoprotein levels are associated with the development of atherosclerosis and may...