Publication Date:
2017-04-04
Description:
After some short test surveys, during the
2004–2005 summer expedition in Antarctica, a geomagnetic
French-Italian observatory was installed on the plateau (geographic
coordinates: 75.1 S, 123.4 E; corrected geomagnetic
coordinates: 88.9 S, 54.3 E; UT=LT−8) very close to
the geomagnetic pole. In this paper we present some peculiarities
of the daily variation as observed at this polar cap
observatory during the years 2005 and 2006, taking into account
the different Loyd seasons and different interplanetary
magnetic field conditions. Some interesting results emerge
from the analysis, confirming the dependence of the daily
variation (and of the associated polar current systems) on
the IMF Bz and By components. In particular the analysis
showed that different Bz conditions correspond to different
contribution to daily variation of ionospheric and field
aligned currents, while particular By conditions lead to a time
shift of the diurnal variation, indicating an asymmetry with
respect to the noon meridian.
Description:
Published
Description:
2045–2051
Description:
3.9. Fisica della magnetosfera, ionosfera e meteorologia spaziale
Description:
1.6. Osservazioni di geomagnetismo
Description:
JCR Journal
Description:
reserved
Keywords:
Geomagnetism and paleomagnetism (Time variations, diurnal to secular)
;
Magnetospheric physics (Polar cap phenomena; Solar wind-magnetosphere interactions)
;
01. Atmosphere::01.03. Magnetosphere::01.03.99. General or miscellaneous
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
article
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