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Geomagnetism and Aeronomy

, Volume 54, Issue 7, pp 926–932 | Cite as

Solar spectral irradiance and total solar irradiance at a solar minimum

  • E. E. Benevolenskaya
  • S. N. Shapovalov
  • I. G. Kostuchenko
Article

Abstract

Results are presented for a wavelet analysis of solar spectral irradiance (SSI) in the ultraviolet to infrared range and total solar irradiance (TSI). The study is based on data collected by the Solar Radiation and Climate Experiment (SORCE) satellite from March 10, 2007 to January 23, 2010. Cross-wavelet analysis finds relationships of varying degrees of tightness between SSI, TSI, and magnetic flux in a sunspot zone on the surface rotation timescales of solar activity complexes. Wavelet coherence shows how magnetic flux variations within a latitudinal sunspot zone are related with spectral irradiance variations. For example, variations in ultraviolet radiation at UV 200.5 nm are in phase with those of the magnetic flux associated with solar activity complexes. However, there is an unusual interval UV 310 to 380 nm, in which coherent structures disappear and UV radiation variations do not follow the changes in the magnetic flux.

Keywords

Magnetic Flux Solar Minimum Total Solar Irradiance Carrington Rotation Wavelet Coherence 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Pleiades Publishing, Ltd. 2014

Authors and Affiliations

  • E. E. Benevolenskaya
    • 1
    • 2
  • S. N. Shapovalov
    • 3
  • I. G. Kostuchenko
    • 4
  1. 1.Main (Pulkovo) Astronomical ObservatoryRussian Academy of SciencesSt. PetersburgRussia
  2. 2.St. Petersburg State UniversitySt. PetersburgRussia
  3. 3.Arctic and Antarctic Research InstituteSt. PetersburgRussia
  4. 4.Karpov Institute of Physical ChemistryMoscowRussia

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