Line-blanketing variations in the irradiance spectrum of the sun from maximum to minimum of the solar cycle

Journal Article · Wed May 01 00:00:00 EDT 1991 · Astrophysical Journal; (United States)

DOI:https://doi.org/10.1086/169980· OSTI ID:5549844

Mitchell, Jr, W E; Livingston, W C ^[1]

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1. Ohio State University, Columbus (USA) Kitt Peak National Observatory, Tucson, AZ (USA)

Solar irradiance spectra obtained at or near the maximum and minimum phases of the solar magnetic activity cycle are compared. The characteristics of these spectra are related to the irradiance measurements available from the Active Cavity Radiometer Irradiance Monitor (ACRIM) of the SMM. An interpretation based on sunspots and faculae being added to the atmosphere at solar maximum can account for less than 4 percent of the ACRIM decrease to be arising in the 500-560 nm range. The UV, with its much greater line-blanketing, is more important, in agreement with the finding of Lean (1989). 38 refs.

• OSTI ID: 5549844
• Journal Information: Astrophysical Journal; (United States), Journal Name: Astrophysical Journal; (United States) Vol. 372; ISSN ASJOA; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

640104* -- Astrophysics & Cosmology-- Solar Phenomena
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ABSORPTION SPECTRA
ATMOSPHERES
COMPARATIVE EVALUATIONS
ELECTROMAGNETIC RADIATION
FACULAE
LINE WIDTHS
MAIN SEQUENCE STARS
RADIATIONS
SOLAR ACTIVITY
SOLAR ATMOSPHERE
SOLAR FLUX
SPECTRA
STARS
SUN
ULTRAVIOLET RADIATION