HR: 1330h
AN: SH23B-01    [Abstracts]
TI: A Critical Review of Measurements and Models of Composite Total Solar Irradiance
AU: * Pap, J M
EM: papj@marta.gsfc.nasa.gov
AF: University of Maryland,Baltimore County, NASA/Goddard Space Science Center, Greenbelt, MD 20770 United States
AU: McIntosh, P
EM: pmcintosh@solar.stanford.edu
AF: HelioSynoptics, 3885 Paseo del Prado St, Boulder, CO 80301 United States
AB: After nearly three decades of total solar irradiance monitoring there is still uncertainty about long-term trends, even whether there is a significant solar cycle dependence. The curret proxy data used in irradiance modeling are summarized and their limitations considered. The recent data obtained during solar cycle 23 provides an enlarged database and additional short-term irradiance variations associated with active region developments. New data about large-scale solar features reveal solar cycle variations and dramatic changes during episodes of extreme activity. These observations suggest potential mechanisms for irradiance variation independent of, or in addition to, sunspots and faculae.
DE: 7524 Magnetic fields
DE: 7529 Photosphere
DE: 7536 Solar activity cycle (2162)
DE: 7537 Solar and stellar variability
DE: 7538 Solar irradiance
SC: SPA-Solar and Heliospheric Physics [SH]
MN: 2005 Joint Assembly