GPS detection of the ionospheric disturbances over China due to impacts of Typhoons Rammasum and Matmo
GPS detection of the ionospheric disturbances over China due to impacts of Typhoons Rammasum and Matmo
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DOI：
10.1002/2016ja023449
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发表时间：
2017-01
期刊：
影响因子：
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通讯作者：
Q. Song;F. Ding;Xiaoxin Zhang;T. Mao
中科院分区：
文献类型：
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作者：
Q. Song;F. Ding;Xiaoxin Zhang;T. Mao
利用中国密集GPS网的二维总电子含量扰动图，首次给出了台风可能激发的中尺度电离层扰动（MSTID）。2014年7月19日和7月23日，在台风威马逊和麦德姆登陆期间，分别观测到两次MSTID。在2014年7月19日06：56-07：40 UT探测到Rammasum激发的MSTID，平均水平相速度为118 m/s，振幅约为2个总电子含量单位（TECU），1 TECU = 1016 el m−2，水平延伸约600 km。2014年7月23日14：48-15：54 UT观测到Matmo相关的MSTID;波前、扰动振幅和平均水平相速度分别为1000 km、1.8 TECU和132 m/s。两个MSTID都向西南方向传播，传播距离小于200公里。MSTID的传播距离短，表明MSTID可能是由台风产生的体积力引起的。
Medium‐scale traveling ionospheric disturbances (MSTIDs) possibly excited by typhoon have been presented, for the first time, by applying the two‐dimensional total electron content perturbation maps derived from the dense Global Position System (GPS) network in China. Two MSTIDs were observed on 19 July and 23 July 2014, respectively, during the landing phases of Typhoons Rammasun and Matmo. The MSTIDs excited by Rammasum were detected at 06:56–07:40 UT on 19 July 2014, with a mean horizontal phase velocity of 118 m/s and an amplitude of about 2 total electron content unit (TECU), 1 TECU = 1016 el m−2, it horizontally extended to about 600 km. The Matmo‐related MSTIDs were observed at 14:48–15:54 UT on 23 July 2014; the wavefront, perturbation amplitude, and the mean horizontal phase velocity were 1000 km, 1.8 TECU, and 132 m/s, respectively. Both MSTIDs propagated southwestward with a distance less than 200 km. The short propagation distances of the MSTIDs indicate that the MSTIDs may be caused by the body forces resulting from the typhoons.