Low-latitude daytime F-region irregularities observed in two geomagnetically quiet days by the Hainan coherent scatter phased array radar (HCOPAR)
Low-latitude daytime F-region irregularities observed in two geomagnetically quiet days by the Hainan coherent scatter phased array radar (HCOPAR)
复制标题
海南相干散射相控阵雷达（HCOPAR）连续两天地磁安静观测到的低纬度白天F区不规则
DOI：
10.1002/2016ja023628
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发表时间：
2017
期刊：
影响因子：
--
通讯作者：
Zhihua Wang
中科院分区：
文献类型：
--
作者：
Gang Chen;Han Jin;Jingye Yan;Shaodong Zhang;Guozhu Li;Tatsuhiro Yokoyama;Guotao Yang;Chunxiao Yan;Chen Wu;Jin Wang;Dingkun Zhong;Yaxian Li;Zhihua Wang
Hainan coherent scatter phased array radar (HCOPAR) located at low latitude of China has recorded the extremely rare daytimeFregion irregularities at noon of 22 July 2013 and 23 May 2016. The two field‐aligned irregularities (FAIs) appeared in the topsideF2layer and presented small Doppler velocities and narrow spectral widths. The fan sector maps show that the FAIs moved northward with almost no zonal speed. The irregularities emerged in the geomagnetically quiet condition and were irrelevant to the storm‐induced eastward electric field as other daytime cases. More than 2 h after the emergency of the daytime irregularities over Hainan, the Shaoyang digisonde situated ~870 km north to the HCOPAR recorded the spread‐Fin ionosphericF1layer. According to the echo altitudes, the spread‐Fmay connect the daytime bubbles via magnetic field line. The strong photoionization after sunrise made it difficult to generate the plasma bubbles in the sunlit ionosphere. Consequently, the two midday FAIs over Hainan may drift along the magnetic field lines from higher altitudes in the south and are most likely the remnant of previous night's bubbles.
