Lidar Observations of Thermosphere-Ionospheric Ca+ at Mohe (122.3°E, 53.5°N)

IF 2.6 2区 地球科学 Q2 ASTRONOMY & ASTROPHYSICS
Jing Jiao, Fang Wu, Lifang Du, Guotao Yang, Haoran Zheng, Xiaofei Wu
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引用次数: 0

Abstract

The ionosphere is an open area, affected by solar activity or geomagnetic activity, and affected by the lower atmosphere. Moreover, previous studies believed that metallic iron ions were a necessary condition for the formation of ionospheric irregularities, but so far there are no favorable observations to support it. In this paper, we use a Ca+ lidar at Mohe to explore the relationship between metal ions and ionospheric irregularities. The reason for choosing Mohe Station is that this region is at the northernmost point of China and is on the edge of the sub-aurora zone during the peak year of solar activity. Mohe thermosphere and ionosphere Ca+ (TICa+) is associated with Spread F or may be related with magnetic storms. The TICa+ generally occurred before dawn. In addition, the density of main Ca+ layer (80–120 km) in the autumn months is low, and the upper TICa+ (120–300 km) event density is also low with an order of 10 cm−3. However, during magnetic storm periods, the density of TICa+ increased with an order of 100 cm−3, which is comparable to or higher than summer results.

漠河(122.3°E, 53.5°N)热层-电离层Ca+的激光雷达观测
电离层是一个开放的区域,受太阳活动或地磁活动的影响,并受低层大气的影响。此外,以往的研究认为金属铁离子是电离层不规则结构形成的必要条件,但目前还没有有利的观测结果支持这一观点。在本文中,我们利用漠河的Ca+激光雷达来探索金属离子与电离层不规则性的关系。选择漠河站的原因是该地区位于中国的最北端,在太阳活动的高峰年处于亚极光带的边缘。漠河热层和电离层Ca+ (TICa+)与扩散F有关,可能与磁暴有关。TICa+通常发生在黎明之前。此外,秋季主要Ca+层(80 ~ 120 km)密度较低,上层(120 ~ 300 km)事件密度也较低,约为10 cm−3数量级。然而,在磁暴期间,TICa+的密度以100 cm−3的数量级增加,这与夏季的结果相当或更高。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Journal of Geophysical Research: Space Physics
Journal of Geophysical Research: Space Physics Earth and Planetary Sciences-Geophysics
CiteScore
5.30
自引率
35.70%
发文量
570
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