Naslov
Origin and Characteristics of the Southward Component of the Interplanetary Magnetic Field

Autori
Verbanac, Giuliana ; Bandić, Mario

Izvornik
Solar physics (0038-0938) 296 (2021); 183, 16

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

Ključne riječi
Heliosphere ; Sun magnetic fields ; Solar-terrestrial relations ; Solar wind

Sažetak
We investigate the rectified interplanetary magnetic field (IMF) components in two coordinate systems, GSEQ and GSM, focusing on the southward pointing component (Bs) in GSM within the period 1999 – 2017. The analysis is performed for different solar activity levels. The obtained results are valuable for the theoretical interpretation of IMF components variations and variations seen in geomagnetic indices. Bs ordered according to the polarity exhibits a “pair of spectacles” pattern. This reveals that Bs can also exist for toward/away field in fall/spring. The field is reduced, but it is not zero. Thus, in “unfavorable” seasons, ge- omagnetic activity can be due to reduced Bs and not because the field is northward pointing. We show that patterns of the experimental Bs fields are not in agreement with the Russell- McPherron model of Bs as widely assumed. The present study contributes in understanding the nature and behavior of Bs, which is the important element that controls the reconnection process and has a great influence on terrestrial space weather over the solar cycle.

Izvorni jezik
Engleski

Znanstvena područja
Fizika, Geofizika

POVEZANOST RADA