ACRIM-gap and total solar irradiance revisited: Is there a secular trend between 1986 and 1996?

Details ACRIM-gap and total solar irradiance revisited: Is there a secular trend between 1986 and 1996? ACRIM-gap and total solar irradiance revisited: Is there a secular trend between 1986 and 1996?

2009-11-19

arxiv.org/abs/0911.3817v1

Geophys. Res. Lett., 36, L20101, doi:10.1029/2009GL040707

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

4 figures

Scientific paper

10.1029/2009GL040707

A gap in the total solar irradiance (TSI) measurements between ACRIM-1 and ACRIM-2 led to the ongoing debate on the presence or not of a secular trend between the minima preceding cycles 22 (in 1986) and 23 (1996). It was recently proposed to use the SATIRE model of solar irradiance variations to bridge this gap. When doing this, it is important to use the appropriate SATIRE-based reconstruction, which we do here, employing a reconstruction based on magnetograms. The accuracy of this model on months to years timescales is significantly higher than that of a model developed for long-term reconstructions used by the ACRIM team for such an analysis. The constructed `mixed' ACRIM - SATIRE composite shows no increase in the TSI from 1986 to 1996, in contrast to the ACRIM TSI composite.

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