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Wavelength dependence of solar rotation and solar cycle uv irradiance variations
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | London Sr., Julius Rottman, Gary J. |
| Copyright Year | 1990 |
| Description | It is shown that for the 5-year period 1982 to 1987 the solar irradiance decrease is estimated to be about 5 to 7 percent over the spectral interval 195 to 225 nm. This change becomes progressively smaller with increasing wavelength. For the 2-1/3 year period, January 1987 to April 1989, the irradiance increases about 6 percent at 195 to 205 nm and about 2 percent between 215 to 250 nm. Both 27-day and 13.5-day relative amplitudes peak at the time near solar maximum (1982) but remain comparatively small between 1983 and the onset of solar cycle 22. An average 280 day oscillation is noted for wavelengths up to 230 nm. No physical mechanism is offered for this variation. |
| File Size | 219249 |
| Page Count | 5 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19910003187 |
| Archival Resource Key | ark:/13960/t3nw4cb9c |
| Language | English |
| Publisher Date | 1990-08-01 |
| Access Restriction | Open |
| Subject Keyword | Solar Physics Amplitudes Daytime Solar Activity Effects Estimating Variations Oscillations Spectra Irradiance Solar Cycles Sun Solar Rotation Ultraviolet Radiation Wavelengths Solar Radiation Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
