Issue |
A&A
Volume 467, Number 1, May III 2007
|
|
---|---|---|
Page(s) | 335 - 346 | |
Section | The Sun | |
DOI | https://doi.org/10.1051/0004-6361:20066725 | |
Published online | 05 March 2007 |
Reconstruction of solar total irradiance since 1700 from the surface magnetic flux
Max-Planck-Institut für Sonnensystemforschung, Max-Planck-Str. 2, 37191 Katlenburg-Lindau, Germany e-mail: natalie@mps.mpg.de
Received:
9
November
2006
Accepted:
23
February
2007
Context.Total solar irradiance changes by about 0.1% between solar activity maximum and minimum. Accurate measurements of this quantity are only available since 1978 and do not provide information on longer-term secular trends.
Aims.In order to reliably evaluate the Sun's role in recent global climate change, longer time series are, however, needed. They can only be assessed with the help of suitable models.
Methods.The total solar irradiance is reconstructed from the end of the Maunder minimum to the present based on variations of the surface distribution of the solar magnetic field. The latter is calculated from the historical record of the sunspot number using a simple but consistent physical model.
Results.Our model successfully reproduces three independent data sets: total
solar irradiance measurements available since 1978, total photospheric
magnetic flux since 1974 and the open magnetic flux since 1868 empirically
reconstructed using the geomagnetic aa-index. The model predicts an increase
in the solar total irradiance since the Maunder minimum of
Wm-2.
Key words: Sun: activity / Sun: faculae, plages / Sun: magnetic fields / solar-terrestrial relations / sunspots
© ESO, 2007
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.