Response of the Equatorial Ionosphere to the Annular Solar Eclipse of 15 January 2010
Response of the Equatorial Ionosphere to the Annular Solar Eclipse of 15 January 2010
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DOI：
10.1029/2019ja027348
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发表时间：
2020-07
期刊：
影响因子：
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通讯作者：
L. Jose;C. Vineeth;T. Pant;K. Kumar
中科院分区：
文献类型：
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作者：
L. Jose;C. Vineeth;T. Pant;K. Kumar
本文介绍了赤道电离层对2010年1月15日中午日环食的响应。该观测是在印度的一个地磁倾斜赤道站特里凡得琅（8.5oE; 77 oN;倾斜纬度0.5oN）上使用数字探空仪、流星风雷达和质子旋进磁力计进行的。研究发现，赤道电离层E、F1和F2区对日食的响应具有不同的时间延迟，F1区响应较快，E和F2区响应较慢。虽然人们已经对日食期间F2区的延迟响应进行了研究，但E区的延迟响应是相当出乎意料的，因为该区域是由复合化学控制的。这似乎是合理的原因进行了探讨，并建议，原子氧的向下扩散起着重要的作用，所观察到的现象。
This paper presents the response of the equatorial ionosphere to the noon time annular solar eclipse of 15 January 2010. The observation has been made using a Digisonde, Meteor Wind Radar, and Proton Precession Magnetometer over Trivandrum, (8.5oE; 77oN; dip lat 0.5oN), a geomagnetic dip equatorial station in India. It has been found that the E, F1, and F2 regions of the equatorial ionosphere respond to solar eclipse with different time delays, F1 being responding faster and the E and F2 regions slower. Though there have been studies on the delayed response of F2 region during the solar eclipses, the delayed response of E region is quite unexpected since this region is dominated by the recombination chemistry. The plausible reasons for this have been explored, and it is suggested that the downward diffusion of atomic oxygen plays a major role for the observed phenomenon.