Abstract
We present the power spectrum of solar irradiance during 1985 and 1987, obtained from the active cavity radiometer irradiance monitor project from timescales of minutes to months. At low frequency, the spectra are Lorentzian [proportional to 1/(f2 + f02)]. At higher frequencies, they are proportional to f-1/2. A linear, stochastic model of the turbulent heat transfer between the granulation layer (modeled as a homogeneous thin layer with a radiative boundary condition) and the rest of the convection zone (modeled as a homogeneous thick layer with thermal and diffusion constants appropriate the lower convection zone) explains the observed spectrum.
| Original language | English (US) |
|---|---|
| Journal | Astrophysical Journal |
| Volume | 463 |
| Issue number | 1 PART II |
| State | Published - 1996 |
| Externally published | Yes |
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Keywords
- Convection
- Diffusion
- Sun: activity
- Turbulence
ASJC Scopus subject areas
- Space and Planetary Science
Cite this
Variations in solar luminosity from timescales of minutes to months. / Pelletier, Jon.
In: Astrophysical Journal, Vol. 463, No. 1 PART II, 1996.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Variations in solar luminosity from timescales of minutes to months
AU - Pelletier, Jon
PY - 1996
Y1 - 1996
N2 - We present the power spectrum of solar irradiance during 1985 and 1987, obtained from the active cavity radiometer irradiance monitor project from timescales of minutes to months. At low frequency, the spectra are Lorentzian [proportional to 1/(f2 + f02)]. At higher frequencies, they are proportional to f-1/2. A linear, stochastic model of the turbulent heat transfer between the granulation layer (modeled as a homogeneous thin layer with a radiative boundary condition) and the rest of the convection zone (modeled as a homogeneous thick layer with thermal and diffusion constants appropriate the lower convection zone) explains the observed spectrum.
AB - We present the power spectrum of solar irradiance during 1985 and 1987, obtained from the active cavity radiometer irradiance monitor project from timescales of minutes to months. At low frequency, the spectra are Lorentzian [proportional to 1/(f2 + f02)]. At higher frequencies, they are proportional to f-1/2. A linear, stochastic model of the turbulent heat transfer between the granulation layer (modeled as a homogeneous thin layer with a radiative boundary condition) and the rest of the convection zone (modeled as a homogeneous thick layer with thermal and diffusion constants appropriate the lower convection zone) explains the observed spectrum.
KW - Convection
KW - Diffusion
KW - Sun: activity
KW - Turbulence
UR - http://www.scopus.com/inward/record.url?scp=15444363231&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=15444363231&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:15444363231
VL - 463
JO - Astrophysical Journal
JF - Astrophysical Journal
SN - 0004-637X
IS - 1 PART II
ER -