Napredna pretraga

Pregled bibliografske jedinice broj: 775950

Relationship between plasmapause, solar wind and geomagnetic activity between 2007 and 2011


Verbanac, Giuliana; Pierrard, Viviane; Bandić, Mario; Darrouzet, Fabien; Rauch, J.-Louis; Décréau, Pierrette
Relationship between plasmapause, solar wind and geomagnetic activity between 2007 and 2011 // Annales Geophysicae, 33 (2015), 1271-1283 doi:10.5194/angeo-33-1271-2015 (međunarodna recenzija, članak, znanstveni)


Naslov
Relationship between plasmapause, solar wind and geomagnetic activity between 2007 and 2011

Autori
Verbanac, Giuliana ; Pierrard, Viviane ; Bandić, Mario ; Darrouzet, Fabien ; Rauch, J.-Louis ; Décréau, Pierrette

Izvornik
Annales Geophysicae (0992-7689) 33 (2015); 1271-1283

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Plasmapause position; geomagnetic activity; solar wind; Cluster satellite

Sažetak
Taking advantage of the Cluster satellite mission and especially the observations of the instru- ment WHISPER to deduce the electron number density along the orbit of the satellites, we studied the relationships between the plasmapause positions (Lpp) and the following Lpp indicators: (a) 5 solar wind coupling functions Bz (Z-component of the interplanetary magnetic field vector, B, in GSM system), BV related to the electric field (V is solar wind velocity), dΦmp /dt that combines different physical processes responsible for the magnetospheric activity and (b) geomagnetic indices Dst, Ap and AE. The analysis is performed separately for three magnetic local time (MLT) sec- tors: Sector1–night sector (01-07 MLT), Sector2–day sector (07-16 MLT), Sector3–evening sector 10 (16-01 MLT), and for all MLT taken together. All Lpp indicators suggest the faster plasmapause response in the post-midnight sector. Delays in the plasmapause responses (hereafter time–lags) are approximately 2–27 hours, always increasing from Sector1 to Sector3. The obtained fits clearly re- solve the MLT structures. The variability of the plasmapause is the largest for low values of Lpp indicators, especially in Sector2. At low activity levels, Lpp exhibits the largest values on the day- 15 side (in Sector2) and smallest in the post-midnight side (Sector1) Displacements towards larger values on the evening side (Sector3) and lower values on the dayside (Sector2) are identified for enhanced magnetic activity. Our results contribute to constrain the physical mechanisms involved in the plasmapause formation and to further study the still not well understood related issues.

Izvorni jezik
Engleski

Znanstvena područja
Fizika, Geologija



POVEZANOST RADA


Ustanove
Prirodoslovno-matematički fakultet, Zagreb

Autor s matičnim brojem:
Giuliana Verbanac, (255244)

Časopis indeksira:


  • Current Contents Connect (CCC)
  • Web of Science Core Collection (WoSCC)
    • Science Citation Index Expanded (SCI-EXP)
    • SCI-EXP, SSCI i/ili A&HCI
  • Scopus


Citati