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Title of Journal: Sol Phys

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Abbravation: Solar Physics

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Springer Netherlands

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DOI

10.1016/0550-3213(85)90577-2

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1573-093X

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Variations in Ratio and Correlation of Solar Magne

Authors: Elena Golubeva
Publish Date: 2016/09/27
Volume: 291, Issue: 8, Pages: 2213-2241
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Abstract

Variations in the solar magneticfield ratio over 13 years are analyzed relying on the comparison of simultaneous measurements in two spectral lines at the Mount Wilson Observatory MWO The ratio and correlation coefficient are calculated over the general working range of measured magneticfield values and in various ranges of the field magnitudes Variations in both parameters are considered We found the following tendencies i the parameters show changes with the cycle of solar activity in the general case ii their dependence on magneticfield magnitude is a nonlinear function of time and this is especially pronounced in the ratio behavior iii several separate ranges of the field magnitudes can be distinguished based on the behavioral patterns of the ratio variations Correspondences between these ranges and the known structural objects of the solar atmosphere are discussed This permits us to reach the conclusion that the dependence of parameters considered on the magneticfield magnitude and time is connected with the variety of magnetic structural components and their cyclic rearrangements The results represented may be useful for solving interpretation problems of solar magneticfield measurements and for the crosscalibration of applicable instruments They can also be of interest for tasks related to the creation of a uniform long temporal series of solar magneticfield data from various sourcesThis study analyzes data from the synoptic program at the 150Foot Solar Tower of the Mt Wilson Observatory The Mt Wilson 150Foot Solar Tower is operated by UCLA with funding from NASA ONR and NSF under agreement with the Mt Wilson Institute The author is grateful to the staff of the observatory who regularly acquired data and provided the undisturbed operation of the websiteThe author is grateful to L Bertello for his comments concerning the crosscalibration stability of magnetograms to RK Ulrich for the useful discussion about MWO data to RB Teplitskaya for professional advice to ML Demidov for his review of the study to DYu Kolobov for his valuable critical remarks on the manuscript to J Sutton for correcting the English and to A Kustov for his assistance in preparing of the LaTex code

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Other Papers In This Journal:
  1. Coronal Mass Ejections from the Same Active Region Cluster: Two Different Perspectives
  2. Gnevyshev Peaks in the CME Average Speeds in Cycle 23
  3. Mapping Solar Wind Streams from the Sun to 1 AU: A Comparison of Techniques
  4. Non-reflective Propagation of Kink Waves in Coronal Magnetic Loops
  5. High-Energy Emission from a Solar Flare in Hard X-rays and Microwaves
  6. Estimating Electric Current Densities in Solar Active Regions
  7. Total Solar Irradiance Measurement and Modelling during Cycle 23
  8. Reduced Coronal Emission Above Large Isolated Sunspots
  9. Observational Signatures of Impulsively Heated Coronal Loops: Power-Law Distribution of Energies
  10. Transition of the Sunspot Number from Zurich to Brussels in 1980: A Personal Perspective
  11. Very High-Resolution Solar X-Ray Imaging Using Diffractive Optics
  12. Tracking of Coronal White-Light Events by Texture
  13. An Interpretation of a Possible Mechanism for the First Ground-Level Enhancement of Solar Cycle 24
  14. Velocities and Temperatures of an Ellerman Bomb and Its Associated Features
  15. Kink Wave Propagation in Thin Isothermal Magnetic Flux Tubes
  16. Ensemble Modeling of CMEs Using the WSA–ENLIL+Cone Model
  17. A Simple Way to Estimate the Soft X-ray Class of Far-Side Solar Flares Observed with STEREO/EUVI
  18. Multi-spacecraft Observations of CIR-Associated Ion Increases During the Ulysses 2007 Ecliptic Crossing
  19. Numerical Simulation of a Solar Active Region. I: Bastille Day Flare
  20. Magnetic Topology of Active Regions and Coronal Holes: Implications for Coronal Outflows and the Solar Wind
  21. Oscillations in Solar Faculae. III. The Phase Relations Between Chromospheric and Photospheric Line-of-Sight Velocities
  22. A Search for Helioseismic Signature of Emerging Active Regions
  23. Subsecond (0.1 s) Pulsations in the 11 April 2001 Radio Event
  24. Global Heliospheric Parameters and Cosmic-Ray Modulation: An Empirical Relation for the Last Decades
  25. Modeling of EIS Spectrum Drift from Instrumental Temperatures
  26. Preface
  27. Emission of Type II Radio Bursts – Single-Beam Versus Two-Beam Scenario
  28. Historical Heliophysical Series of the Ebro Observatory
  29. Dynamics of an Erupting Arched Magnetic Flux Rope in a Laboratory Plasma Experiment
  30. Eclipses Observed by Large Yield RAdiometer (LYRA) – A Sensitive Tool to Test Models for the Solar Irradiance
  31. The Self-Inversion of the Sign of Circular Polarization in “Halo” Microwave Sources
  32. Recent Developments of NEMO: Detection of EUV Wave Characteristics
  33. Design and Ground Calibration of the Helioseismic and Magnetic Imager (HMI) Instrument on the Solar Dynamics Observatory (SDO)
  34. Preface
  35. Evidence that Synchrotron Emission from Nonthermal Electrons Produces the Increasing Submillimeter Spectral Component in Solar Flares
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