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Solar Physics

, Volume 289, Issue 7, pp 2419–2431 | Cite as

Uncertainties in Solar Synoptic Magnetic Flux Maps

  • L. Bertello
  • A. A. Pevtsov
  • G. J. D. Petrie
  • D. Keys
Article

Abstract

Magnetic flux synoptic charts are critical for a reliable modeling of the corona and heliosphere. Until now, however, these charts were provided without uncertainty estimates. The uncertainties are due to instrumental noise in the measurements and to the spatial variance of the magnetic flux distribution that contributes to each bin in the synoptic chart. We describe here a simple method to compute synoptic magnetic flux maps and their corresponding magnetic flux spatial variance charts that can be used to estimate the uncertainty in the results of coronal models. We have tested this approach by computing a potential-field source-surface model of the coronal field for a Monte Carlo simulation of Carrington synoptic magnetic flux maps generated from the variance map. We show that these uncertainties affect both the locations of source-surface neutral lines and the distributions of coronal holes in the models.

Keywords

Data analysis Observations Solar activity 

Notes

Acknowledgements

The authors acknowledge fruitful discussions with Anna Hughes, Jack Harvey, Janet Luhmann, and Thomas Wentzel. This work uses SOLIS/VSM data obtained by the NSO Integrated Synoptic Program (NISP), managed by the National Solar Observatory, which is operated by the Association of Universities for Research in Astronomy (AURA), Inc. under a cooperative agreement with the National Science Foundation.

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Copyright information

© Springer Science+Business Media Dordrecht 2014

Authors and Affiliations

  • L. Bertello
    • 1
  • A. A. Pevtsov
    • 2
  • G. J. D. Petrie
    • 1
  • D. Keys
    • 3
  1. 1.National Solar ObservatoryTucsonUSA
  2. 2.National Solar ObservatorySunspotUSA
  3. 3.University of ArizonaTucsonUSA

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