Physics
Scientific paper
Sep 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003georl..30suly4r&link_type=abstract
Geophysical Research Letters, Volume 30, Issue 19, pp. ULY 4-1, CiteID 8030, DOI 10.1029/2003GL017296
Physics
4
Interplanetary Physics: Interplanetary Magnetic Fields, Interplanetary Physics: Solar Cycle Variations (7536), Interplanetary Physics: Solar Wind Plasma, Interplanetary Physics: Sources Of The Solar Wind
Scientific paper
The second Ulysses orbit of the Sun has provided a unique opportunity for the study of the interplanetary manifestation of coronal mass ejections (ICMEs) over a wide range of heliographic latitudes. The Ulysses dataset between July 1995 and mid April 2003 has been surveyed for magnetic clouds (MCs), a subset of ICMEs. As a result of the rising solar activity during this time, ICMEs were observed over a wide range of heliographic latitudes. By fitting a constant α, force-free flux rope model to each event we determine whether the local axis orientation of the MCs are directed in an eastward or a westward sense. We show that during this period in solar cycle 23, those MCs whose hemispheric origin is clear display a trend, with MCs in the southern hemisphere having predominantly westward directed local axes and those in the northern hemisphere having eastward directed local axes.
Forsyth Robert J.
Rees Adam
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