Schumann resonance frequency and conductivity in the nighttime ionosphere of Mars: A source for lightning |
| |
Authors: | SA Haider Jayesh P Pabari J Masoom Siddhi Y Shah |
| |
Institution: | 1. Planetary Science Division, Physical Research Laboratory, Ahmedabad, India;2. Faculty of Science, Pacific Academy of Higher Education and Research, University, Udaipur, India |
| |
Abstract: | We have solved the Maxwellian equations of electromagnetic waves which oscillate within the cavity formed in the lower ionosphere of Mars between 0 and 70?km. The electrical conductivity and Schumann Resonance (SR) frequencies are calculated in the lower ionosphere of Mars, in the presence of a major dust storm that occurred in Martian Year (MY) 25 at low latitude region (25°–35°S). It is found that the atmospheric conductivity reduced by one to two orders of magnitude in the presence of a dust storm. It represents a small dust layer at about 25–30?km altitudes where lightning can occur. We also found that the SR frequencies peak at?~18?km with values 19.9, 34.5 and 48.8?Hz for the modes l?=?1, 2 and 3, respectively, in the non-homogeneous medium. Our results indicate that practical or measurable values of SR are dependent on the altitudes. |
| |
Keywords: | Conductivity Dust Ionosphere Lightning Mars Schumann Resonance |
本文献已被 ScienceDirect 等数据库收录! |
|