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Morphological features of ionospheric response to typhoon
Xiao, Z.; Xiao, S. G.; Hao, Y. Q.; Zhang, D. H.; 北京8701信箱
Department空间天气学国家重点实验室
Source PublicationJournal of Geophysical Research-Space Physics
2007
Volume112Issue:A4Pages:A04304
ISSN0148-0227
Language英语
KeywordAcoustic-gravity Waves Equatorial Spread-f Severe Thunderstorms Disturbances Weather
AbstractCouplings between the ionosphere and meteorological events have been studied widely. However, most of them are individual case studies or correlation analyses, and few are aiming at the full morphological features of the ionospheric response processes. In this paper, complete records of 24 strong typhoons from 1987 to 1992 were collected, and comparison was made with corresponding ionospheric HF Doppler shift data. The main purpose of the present work is to find the temporal evolution of these responses and their common features by the merit of the continuities of HF Doppler shift observation in time. On the basis of the statistical analyses, this paper reveals the common features of ionospheric responses to typhoon. A summary of these characteristics is as follows: ( 1) During the existing time of a typhoon, there are almost always medium-scale traveling ionospheric disturbances (TIDs) in the ionosphere, especially when a strong typhoon is landing or near the coast of a mainland. ( 2) These TIDs show quite clear periodicity and their periods vary with time and gradually grow longer. ( 3) After sunset, the wavelike disturbances with large magnitudes often excite the midlatitude spread-F. ( 4) The intense typhoon can cause the wavelike records of the Doppler shift to show the S-shaped echo tracing, which means that the amplitudes of those waves are sufficiently large, and ( 5) the sunrise-like phenomena often appear in nonsunrise time during the period the typhoon exists. The phenomena mentioned above are generally in agreement with the linear propagation theories of the acoustic-gravity waves (AGWs) in the atmosphere. A typhoon is surely one of the important ground sources of the wavelike disturbances in troposphere; this source is very effective especially when a typhoon is landing on or near a mainland coast. Of course, the morphological details of the ionospheric response to typhoon can by no means be completely identical every time. In this study, except for TIDs that almost always appear during all the typhoon events, the other common features are not seen every time. However, we are certain that the phenomena summarized above are statistically the manifestation of the ionospheric response to typhoon since they appear much more frequently during periods influenced by typhoon.
Indexed BySCI
Funding Project中国科学院空间科学与应用研究中心
Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/1069
Collection空间科学部
Corresponding Author北京8701信箱
Recommended Citation
GB/T 7714
Xiao, Z.,Xiao, S. G.,Hao, Y. Q.,et al. Morphological features of ionospheric response to typhoon[J]. Journal of Geophysical Research-Space Physics,2007,112(A4):A04304.
APA Xiao, Z.,Xiao, S. G.,Hao, Y. Q.,Zhang, D. H.,&北京8701信箱.(2007).Morphological features of ionospheric response to typhoon.Journal of Geophysical Research-Space Physics,112(A4),A04304.
MLA Xiao, Z.,et al."Morphological features of ionospheric response to typhoon".Journal of Geophysical Research-Space Physics 112.A4(2007):A04304.
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