What can observed solar irradiance variability tell us about possible long-term changes of the Sun?

Details What can observed solar irradiance variability tell us about possible long-term changes of the Sun? What can observed solar irradiance variability tell us about possible long-term changes of the Sun?

May 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agusmsp23a..05f&link_type=abstract

American Geophysical Union, Spring Meeting 2008, abstract #SP23A-05

Other

1616 Climate Variability (1635, 3305, 3309, 4215, 4513), 2104 Cosmic Rays, 2162 Solar Cycle Variations (7536), 7536 Solar Activity Cycle (2162), 7538 Solar Irradiance

Scientific paper

Total solar irradiance (TSI) measurements from different satellites are available since late 1978 and may be extended by reliable models back to the minimum between cycles 19 and 20 around 1976. This time series shows a downward trend of the cycle averaged data since the eighties. Although this trend is also present in other solar activity related parameters, such as the sunspot numbers, the 10.7cm radio flux, or the MgII index, only the open magnetic flux from the sun (from OMNI2 IMF-B data set) shows besides the same trend values during the minima which are comparable to the ones observed in TSI. Thus, a sensitivity of TSI during the minima relative to the ones of the open magnetic field can be determined. This sensitivity allows to determine TSI during past minima back to the 1880ties when the measurements started on which the reconstruction of the open field can be based. This allows also to compare TSI with the 10Be data and possibly 'calibrate' them back in time.

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