Behavior of the Martian dayside electron density peak during global dust   storms

doi:10.1016/S0032-0633(03)00015-1

CORC > 北京大学 > 地球与空间科学学院

	Behavior of the Martian dayside electron density peak during global dust storms
	Wang, JS ; Nielsen, E
刊名	行星与空间科学
	2003
关键词	Mars ionosphere dust storm electron density RADIO OCCULTATION MEASUREMENTS SOLAR-CYCLE VARIATION UPPER-ATMOSPHERE MAGNETIC-FIELD MARS SURVEYOR IONOSPHERE MARINER-9 VENUS IONIZATION
DOI	10.1016/S0032-0633(03)00015-1
英文摘要	A photochemical equilibrium model of the Martian ionosphere is used to model its behavior during the global dust storm of 1971-1972. In particular, the model is used to explain the observed increase in altitude of the ionospheric peak electron density and for the constancy of the peak electron density. During a dust storm, the lower neutral atmosphere of Mars is heated, and it expands. This leads to both a density increase of the neutral atmosphere and an increase of the altitude of the turbopause. The increase of the turbopause leads to a change of the vertical distribution of the neutral constituents. In response to this, the altitude profiles of electron production rates, as well as the electron density profile, are displaced upwards in altitude. The altitude of the peak electron density can increase by up to about 30 km, depending on the increase of the thermospheric density and on the solar zenith angle. The peak value of electron density at a fixed solar zenith angle shows no significant variation between clear and dusty air cases. It is found that the neutral atmospheric temperature increase in itself contributes much less to the variations in the ionosphere than does the associated neutral density increase. The temperature increase acts mainly as the cause for the density increase in the lower thermosphere, and it is this neutral density increase which plays the dominant role in influencing the ionosphere electron density profile. (C) 2003 Elsevier Science Ltd. All rights reserved.; Astronomy & Astrophysics; SCI(E); EI; 24; ARTICLE; 4-5; 329-338; 51
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/256016]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	Wang, JS,Nielsen, E. Behavior of the Martian dayside electron density peak during global dust storms[J]. 行星与空间科学,2003.
APA	Wang, JS,&Nielsen, E.(2003).Behavior of the Martian dayside electron density peak during global dust storms.行星与空间科学.
MLA	Wang, JS,et al."Behavior of the Martian dayside electron density peak during global dust storms".行星与空间科学 (2003).