库页岛南部附近海啸期范围内大气扰动激发的地震

IF 0.7 Q4 OCEANOGRAPHY
D. Kovalev, P. Kovalev, M. Khuzeeva
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引用次数: 0

摘要

意图本文旨在研究萨哈林岛南部沿海地区观测到的四种天气情况,并考虑其可能的气象成因。方法和结果。使用了2008年海洋地质和地球物理研究所使用安装在萨哈林岛南部海岸带八个点的仪器和萨哈林水文气象服务部提供的天气图获得的海浪记录。对于所有观测点,考虑了meteotsunami存在范围内以地震能量增加为特征的四种天气情况。结果表明,观测波的主要部分的振幅超过了等于4 xrms的标准。因此,所考虑的事件可能与meteotsunami有关;此时,它们的能量几乎分布在整个海啸波的范围内。当meteotsunami不存在时,4-120分钟范围内的海平面振荡能量会减少一个数量级。由于在具有共振特性的海岸带观察到波动,meteotsunamis到达这些地区最终会激发记录的地震。研究表明,在沿海地区,冷锋会产生meteotsunamis,进而引发地震。结论。描述了在海啸周期2-120分钟内,大气扰动产生海浪的条件。研究发现,在萨哈林岛南部地区,即所有定居点所在地,一股向东-南方向延伸的冷锋运动导致了大幅度的地震。在两股冷锋在岛上移动的天气情况下,冷锋经过的地方可能会产生高振幅的地震。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Seiсhes Excited by the Atmospheric Disturbances within the Range of the Meteotsunami Periods nearby the Southern Part of the Sakhalin Island
Purpose. The aim of the paper is to study four synoptic situations, in which the seiches energy increase was observed in the coastal zone of the southern part of the Sakhalin Island, and to consider their possible meteorological origin. Methods and Results. Records of the waves obtained in the Institute of Marine Geology and Geophysics in 2008 using both the instruments installed in eight points in the coastal zone of the southern part of the Sakhalin Island, and the synoptic maps provided by the Sakhalin Hydrometeorological Service Department, were used. For all the observation points, four synoptic situations characterized by increase of the seiches energy within the meteotsunami existence range were considered. It is shown that the amplitudes of the main part of the observed waves exceed the criterion equal to 4 xrms. Therefore the events under consideration can be related to meteotsunami; at that, their energy is distributed almost all over the whole range of tsunami waves. When meteotsunami is absent, energy of the sea level oscillations in the range 4–120 min is reduced by an order. Since fluctuations are observed in the coastal zone possessing the resonant properties, arrival of meteotsunamis to these areas eventually results in exciting the seiches which are recorded. It is shown that in the coastal zone, cold fronts generate meteotsunamis, which, in their turn, give rise to seiches. Conclusions. The conditions for generating sea waves by the atmospheric disturbances within the range of the tsunami periods 2–120 minutes are described. It is found that movement of an extended cold front in the east-south direction leads to generation of the large-amplitude seiches in the region of the southern part of the Sakhalin Island, just where all the settlements are located. At a synoptic situation when two cold fronts are moving over the island, generation of high-amplitude seiches is possible in the places, near which a cold front is passing.
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来源期刊
Physical Oceanography
Physical Oceanography OCEANOGRAPHY-
CiteScore
1.80
自引率
25.00%
发文量
8
审稿时长
24 weeks
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