Unusually High Mean Sea Level in September 1971 Along the South Coast of Japan

Q4 Earth and Planetary Sciences
Kiyoshi Kurashige
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引用次数: 2

Abstract

A few typical cases of unusual high or low mean sea level are selected from the tidal data for Tokyo Bay by the following ways: (1) Unusual days are selected at each station under the condition that the magnitude of daily mean tidal residual be more than twice its standard deviation. (2) We take up those cases in which more than three consecutive unusual days occur simultaneously in the whole area of Tokyo Bay. Both meteorological and oceanographic factors are considered in connection with the occurrence of unusual high or low sea level, which takes place once a year or so. At such times the weather condition is rather gentle in general, and the oceanic condition seems to be responsible for the unusual rise or fall. Warmer sea surface temperature is likely to be associated with the rising of the sea level and colder temperature with the falling. In the inner part of the bay, the land and sea breezes are related to these variations, so that the former (southerly wind) I serves to raise up warmer water, and the latter (northerly wind) to drive out colder water.
1971年9月日本南海岸异常高的平均海平面
从东京湾潮汐资料中选取了几个平均海平面异常高或异常低的典型案例:(1)在日平均潮汐残差的幅度大于其标准差两倍的条件下,选取各站点的异常日。我们研究的是整个东京湾地区同时发生连续三天以上异常天气的情况。气象和海洋因素都被认为与海平面异常高或低的发生有关,这种情况大约每年发生一次。在这样的时间里,天气状况通常是相当温和的,海洋状况似乎是造成不寻常的上升或下降的原因。海洋表面温度升高可能与海平面上升有关,而温度降低则与海平面下降有关。在海湾的内部,陆风和海风与这些变化有关,因此前者(南风)可以提升温暖的海水,后者(北风)可以赶走较冷的海水。
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来源期刊
Papers in Meteorology and Geophysics
Papers in Meteorology and Geophysics Earth and Planetary Sciences-Geophysics
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