A clear link connecting the troposphere and ionosphere: ionospheric reponses to the 2015 Typhoon Dujuan

Jian Kong, Yibin Yao, Yahui Xu, Chungyen Kuo, Liang Zhang, Lei Liu, Changzhi Zhai

研究成果: Article同行評審

13 引文 斯高帕斯(Scopus)

摘要

The global navigation satellite system (GNSS) total electron content (TEC) sequences were used to capture the arrival time and location of the ionosphere disturbances in response to the 2015 Typhoon Dujuan. After removing the de-trended TEC variation, the clear ionosphere disturbances on the typhoon landing day could be distinguished, and these disturbances disappeared from the TEC sequences before and after the typhoon landing day. The foF2 data observed by Xiamen ionosonde station also show ionosphere disturbances. Based on the advantages of GNSS multi-point observations, the disturbances horizontal velocity in the ionosphere were estimated according to the linear theory for a dispersion relation of acoustic gravity waves (AGWs) in an isothermal atmosphere. The average horizontal velocity (∼ 240 m/s) and the radial velocity (∼ 287 m/s) were used in the two-dimensional grid search for the origin point on the Earth’s surface. The origin area was determined to be on the eastern side of Taiwan. Lastly, a possible physical mechanism is discussed in this study. When typhoons land on Taiwan, the severe convective storms and the drag effect from the Central Mountains create an ideal location for development of AGWs. Topographic conditions, like the high lapse rate, contribute to the formation of AGWs, which then propagates into the ionosphere altitude.

原文English
頁(從 - 到)1087-1097
頁數11
期刊Journal of Geodesy
91
發行號9
DOIs
出版狀態Published - 2017 九月 1

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Geochemistry and Petrology
  • Computers in Earth Sciences

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