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Note on the semi-annual effect in the thermosphere
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Mayr, H. G. Volland, H. |
| Copyright Year | 1972 |
| Description | The semi-annual variation in the thermospheric density is discussed in terms of the spatial and temporal variations in the solar heat input. Two heat sources are considered: the solar heat input associated with the semi-annual migration of the sun, and the auroral heat associated with the semi-annual component in magnetic storms. It is shown that the relatively large global component in the semi-annual effect of the total mass density can be explained by the lack of advective loss which otherwise damps the latitude dependent components in the annual and semi-annual variations, and the significant latitude dependence in the semi-annual variations of composition and temperature can be tied to the diffusion process which is induced by the thermospheric circulation. |
| File Size | 353419 |
| Page Count | 12 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19730002619 |
| Archival Resource Key | ark:/13960/t3jx34m2q |
| Language | English |
| Publisher Date | 1972-11-01 |
| Access Restriction | Open |
| Subject Keyword | Geophysics Thermosphere Atmospheric Density Auroras Annual Variations Magnetic Storms Solar Position Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
