Negative trend in total solar irradiance over the satellite era.

ABSTRACT: Linear trends in total solar irradiance (TSI) between different reconstructions of the satellite era, defined as 1978 to 2023, disagree by up to 0.17 W/m² per decade. Furthermore, high-quality satellite radiometer observations of the most recent solar cycle, 24, systematically differ from estimates that rely on TSI proxies for reasons that have been unclear. Using a Bayesian Kalman filtering approach to estimate TSI from both satellite-based observations and proxies gives two complementary explanations: recent satellite-based observations of TSI contain unaccounted-for positive linear drifts, and regression-based reconstructions are affected by commonly used solar magnetic proxies becoming less sensitive to TSI variations at low values. After accounting for satellite instrument

SUBMITTER: Amdur T 

PROVIDER: S-EPMC11929493 | biostudies-literature | 2025 Mar

REPOSITORIES: biostudies-literature