Physics
Scientific paper
Dec 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004agufmsm31b1235m&link_type=abstract
American Geophysical Union, Fall Meeting 2004, abstract #SM31B-1235
Physics
2700 Magnetospheric Physics
Scientific paper
We carry out a statistical investigation relating the depression of the geostationary magnetic field near noon to the strength of the southward component of the IMF (Bz). We use measurements made by GOES, WIND, ACE and ground-based magnetograms. The period studied is 1996--2003. Events have been selected during intervals with (1) a steady dynamic pressure, Pdyn; (2) a steady and negative IMF Bz; (3) when one of the GOES spacecraft was within 2 hours of local noon; and (4) during substorm growth phase (as ascertained by readings from nightside ground magnetometers). The investigation starts with a correction of raw values of the total geostationary field, Btot, for the compression due to Pdyn. To do this, we chose a number of ``reference" days encompassing a wide range of Pdyn values when the IMF was strongly northward (clock angle < 45o), and fitted Btot to the functional form Btot = a + b Pdyn1/2. We then fit the corrected Δ Btot values as a function of Bz. This work extends the investigation of Mühlbachler et al., 2004 by a set of events with extremly large and negative Bz in the range of [0,-52]nT. Thus, we find that saturation of erosion occurs for Bz in the range -12 to -16 nT. We fit the data in several ways and find Δ Btot = -27.76 + 26.1 exp(0.012 Bz) to lie closest to our set of data.
Farrugia Charles J.
Muehlbachler Stefan
No associations
LandOfFree
The Saturation of Dayside Magnetosphere Erosion 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 Saturation of Dayside Magnetosphere Erosion, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Saturation of Dayside Magnetosphere Erosion will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1468278