Correlation between electron density and temperature in the topside ionosphere

NCU Institutional Repository > 地球科學學院 > 太空科學研究所 > 期刊論文 > Item 987654321/50435

jsp.display-item.identifier=請使用永久網址來引用或連結此文件: http://ir.lib.ncu.edu.tw/handle/987654321/50435

题名:	Correlation between electron density and temperature in the topside ionosphere
作者:	Kakinami,Y;Watanabe,S;Liu,JY;Balan,N
贡献者:	太空科學研究所
关键词:	INCOHERENT-SCATTER RADAR;LOW-LATITUDE;EMPIRICAL-MODEL;MILLSTONE HILL;HINOTORI SATELLITE;SOLAR-CYCLE;F-REGION;PROBE;THERMOSPHERE;TRANSPORT
日期:	2011
上传时间:	2012-03-27 17:31:50 (UTC+8)
出版者:	國立中央大學
摘要:	The correlation between the electron temperature (T(e)) and electron density (N(e)) at 600 km height at magnetic dip latitudes (MLat) less than about +/- 40 degrees measured by the Hinotori satellite from February 1981 to June 1982 is presented. The results show the well-known negative correlation between daytime N(e) and T(e) when N(e) is low. However, when the daytime N(e) is significantly high (>10(6) cm(-3)), the correlation turns positive irrespective of latitude, longitude, season, solar flux levels, and magnetic activity levels. The positive correlation is most clear during 1100-1500 local time and around the magnetic dip equator (\|MLat\| < 10 degrees) where high values of N(e) with high T(e) are most abundant. T(e) also increases with increasing MLat in the same N(e) range. Since the cooling through Coulomb collisions increases with the increase of N(e), the results suggest that an additional heat source(s) is involved for the positive correlation between N(e) and T(e). The additional heat source seems to be related to the integrated N(e) along the magnetic field lines from the ground to 600 km altitude in one hemisphere, which is found to decrease with increasing MLat. Although the mechanism for the positive correlation is not well understood, the results imply that the T(e) in the topside ionosphere is controlled more by the integrated N(e) than by in situ N(e) or F(2) peak N(e).
關聯:	JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
显示于类别:	[太空科學研究所 ] 期刊論文

文件中的档案:

档案	描述	大小	格式	浏览次数
index.html		0Kb	HTML	691	检视/开启

在NCUIR中所有的数据项都受到原著作权保护.

社群 sharing

数据加载中.....