Global distribution of thermospheric heat sources: EUV absorption and joule dissipation |
| |
| Authors: | BK Ching YT Chiu |
| |
| Institution: | Space Physics Laboratory, The Aerospace Corporation, El Segundo, California 90245, U.S.A. |
| |
| Abstract: | The global distribution and temporal variations of thermospheric heating due to Joule dissipation of measured ionospheric electric fields are computed. It is shown that the volume Joule dissipation rate at high and middle latitude is similar in magnitude and altitudinal profile to the global solar EUV absorption rate discussed in the previous papers. Thus, Joule dissipation contributes significantly towards reconciling the quantitatively known sources of thermospheric heat input and that required to maintain the normal thermosphere. The combined heat source due to EUV absorption and Joule dissipation varies with the annual cycle in a manner closely resembling that of the thermospheric density. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
