南冲绳海槽地质与地球物理调查的气象和水文条件

The meteorological and hydrologic conditions for the geological and geophysical survey in the Southern Okinawa Trough

为保障南冲绳海槽地质与地球物理调查工作的顺利进行,对该海区气象和水文条件进行了分析。结果表明,影响南冲绳海槽海洋地质与地球物理调查的气象和水温要素主要包括海面风、热带气旋、波浪、黑潮等;根据气象和波浪特征的分析认为,该地区海上调查的最佳时间为每年3-6月,其次为10月至次年2月;调查过程中应采取适当方法应对较强的黑潮表层流和底流对仪器设备的冲击。

In order to carry out the surveys smoothly, we analyzed the weather and hydrologic conditions of southern Okinawa Trough. Our results showed that the factors affecting the surveys mainly included sea surface wind, tropical cyclone,wave and the Kuroshio Current. According to the characteristics of the weather andwave, we concluded that the best period for the survey was from March to June in a year, and the second-best period was from October to the following February.Appropriate means should be taken to cope with the forces impacting on the instruments by the fast surface and bottom current of the Kuroshio.