J. Space Weather Space Clim.
Volume 4, 2014
Solar variability, solar forcing, and coupling mechanisms in the terrestrial atmosphere
|Number of page(s)||6|
|Published online||21 January 2014|
Comparison of Magnesium II core-to-wing ratio observations during solar minimum 23/24
Laboratory for Atmospheric and Space Physics (LASP), University of Colorado, Boulder, CO
2 Institute of Environmental Physics, University of Bremen FB1, PO Box 330440, 28334 Bremen, Germany
3 Cooperative Institute for Research in Environmental Sciences (CIRES), University of Colorado, Boulder, CO 80309, USA
4 National Geophysical Data Center (NGDC), National Oceanic and Atmospheric Administration, Boulder, CO 80305, USA
5 Space Weather Prediction Center (SWPC), National Oceanic and Atmospheric Administration, Boulder, CO 80305, USA
* Corresponding author: e-mail: firstname.lastname@example.org
Accepted: 5 December 2013
The MgII index is an important proxy for solar activity; in particular it correlates well with the EUV which is important for understanding the upper atmosphere. We compare the measurements from all of the instruments making daily measurements during the most recent solar minimum. After adjustments to the data to account for instrumental effects, we find that there are still some discrepancies between the various time series. The data from the primary channel of the SOLar-STellar Irradiance Comparison Experiment (SOLSTICE) on SORCE requires a correction factor starting in early 2006 in order to bring it into agreement with the redundant SOLSTICE channel and with the other datasets. Once this correction has been applied, all the MgII measurements are in good agreement throughout the solar minimum interval.
Key words: solar activity / UV flux / solar cycle
© M. Snow et al., Published by EDP Sciences 2014
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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