Physics
Scientific paper
May 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agusmsm12a..05z&link_type=abstract
American Geophysical Union, Spring Meeting 2009, abstract #SM12A-05
Physics
2730 Magnetosphere: Inner, 2740 Magnetospheric Configuration And Dynamics, 2768 Plasmasphere, 2794 Instruments And Techniques
Scientific paper
The Antarctic continent, the only landmass in the southern polar region, offers the unique opportunity for observations that geomagnetically range from polar latitudes to well into the inner magnetosphere, thus enabling conjugate observations in a wide range of geomagnetic latitudes. The SAMBA (South American Meridional B-field Array) chain is a meridional chain of 12 magnetometers, 11 of them at L=1.1 to L=2.5 along the coast of Chile and in the Antarctica peninsula, and one auroral station along the same meridian. SAMBA is ideal for low and mid-latitude studies of geophysical events and ULF waves. It is conjugate to the northern hemisphere MEASURE and McMAC chains, offering unique opportunities for inter-hemispheric studies. We use 5 of the SAMBA stations and a number of conjugate stations from the Northern hemisphere to determine the field line resonance (FLR) frequency of closely spaced flux tubes in the inner magnetosphere. Standard inversion techniques are used to derive the equatorial mass density of these flux tubes from the FLRs. From our conjugate pairs we find, surprisingly, that the derived mass density of closely spaced flux tubes, from L=1.6 to L=2.5, drops at a rate that cannot be predicted by any of the existing models or agree with past observations. We also study asymmetries in the power of Pc3 waves. We find that during northern summer solstice the waves are significantly stronger at the northern conjugate point, while during northern winter solstice the wave power is comparable over both conjugate points. Finally, using the SAMBA auroral station, WSD, along with all available southern auroral stations we calculate a southern AE index and its direct conjugate northern AE index and compare both with the standard AE index. We explore under what conditions the north-south asymmetries in the AE calculation are due to the significant gap of auroral stations in the Southern hemisphere and under what conditions the asymmetries have a geophysical source.
Boudouridis Athanasios
Chi Peter J.
Moldwin Mark B.
Weygand James M.
Zesta Eftyhia
No associations
LandOfFree
The South American Meridional B-field Array (SAMBA) and opportunities for inter- hemispheric studies does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The South American Meridional B-field Array (SAMBA) and opportunities for inter- hemispheric studies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The South American Meridional B-field Array (SAMBA) and opportunities for inter- hemispheric studies will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1108799