ROSES ID: NRA-00-OSS-01 Selection Year: 2001
Program Element: Independent Investigation: LWS
Principal Investigator: Judith L. Lean
Affiliation(s): Naval Research Laboratory
Summary:The overall goal of the proposed research is an investigation of physical relationships between the Sun's irradiance and plasma energy outputs that influence historical proxies of solar activity recorded at or near the Earth. Explicitly, the relationships sought are those between the closed magnetic flux regions on the Sun that produce irradiance variations and the open flux regions that control the solar wind which modulates terrestrial geomagnetic and cosmogenic indices of historical solar activity. Empirical associations between electromagnetic and plasma outputs from the Sun are evident in contemporary data, as are their mutual connections to the Sun's magnetic activity cycle. Since the observational record of solar irradiance exists for only two cycles, terrestrial proxies are essential to infer historical irradiance variations that may contribute long-term climate change. The present lack of understanding of the physical relationships between solar irradiance and terrestrial proxies impedes the reliable attribution of natural versus anthropogenic causes, and motivates the proposed work.
|Performance Year||Reference||Investigation Type||Actions|
|1||Fröhlich, C.; Lean, J.; (2002), Solar irradiance varia...||not set|
|1||Fröhlich, Claus; Lean, Judith; (2004), Solar radiative o...||not set|