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Based on the data obtained during the 15th Antarctic Expedition of China between November 1998 and February 1999,the paper discusses the water masses distributed on both sides of the Continental Water Boundary(CWB) as well as the spacial variability of the physical characteristics of the central location,the frontal width,the frontal strength,the vertical depth,and the vertical thickness for CWB,The above results are compared with the results from the data obtained during the 9th Antarctic Expedition of China between December 1992 and February 1993,and the temporal variabiltiy of those characteristics is discussed.In addition,the inhomogeneity of the kinematic characteristics and the patterms of the dynamic heights for those water masses located on both sides of CWB are illustrated.As it is pointed out in the paper,the trough in the dynamic height field is identified with the frontal location of CWB and the oceanic current shear.Furthermore,the dynamic reason for the upwelling of the circumpolar deep water can be understood by the explanation described in the paper. 相似文献
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讨论了赤道太平洋西部的上层海洋环流、结果表明:(1)棉兰老涡气旋式环流随着深度的增加而减小。由于埃克曼抽吸作用,它是一个低盐冷涡;(2)对棉兰老岛—巴布亚新几内亚岛之间穿越流的观测表明:该断而北部(5°—6°N)的S向流是棉兰老海流的S向延伸;W向的巴布亚新几内亚沿岸潜流可达该断而的东南部门(2°N一2°S);北赤道逆流则在两者之间沿表层的盐度锋作E向流动。据此,赤道太平洋西部次表层盐度分布状况可得到圆满解释。关键词: 相似文献
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基于青岛地区水库资料,探讨风浪对水库防汛的影响,指出风浪对水库大坝的破坏及在坝体斜坡上,由于风浪破碎所致的平均水位升高和波浪爬高是威胁水库大坝安全的主要因素,风浪的作用降低了水库的蓄水能力和防洪标准,强调在库区,采用消波技术,合理运用漂浮式防波堤消波,消除风浪的影响是保障大坝安全,提高现有水为蓄水能力和防洪标准的科学而有效的方法,提出了水库漂浮式防波堤消波试验研究方案和设计依据。 相似文献
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一九八四年九月十七日至廿一日在巴黎教科文总部召开了热带海洋和全球大气(TOGA)科学计划会议.这次会议是由政府间海洋学委员会(IOC)、世界气象组织(WMO)、海洋研究科委(SCOR)和国际科联理事会(ICSU)联合举办的.据不完全统计,来自世界各地的三十多个国家和地区的代表,9个国际组织的代表,计180余人出席了会议.我国代表汪兆椿等三人以观察员身份出席了会议.会议的主要目的是交流迄今为止的TOGA观测和模式研究的进展和现状,以便在现有的基础上提出TOGA的实施计划. 相似文献
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The data from the Southern Ocean observations of World Ocean Circulation Experiment(WOCE) are used for analysis and illustration of the features and spatial distributions of Circumpolar Deep Water(CDW) in the southern Indian Ocean.It is learnt from the comparison among the vertical distributions of temperature/salinity/oxygen along the 30°E,90°E and 145°E sections respectively that some different features of CDW and the fronts can be found at those longitudes,and those differences can be attributed to the zonal transoceanic flow and the merizonal movement in the Circumpolar Deep Water.In fact,the zonal transoceanic flow is the main dynamic factor for the water exchange between the Pacific Ocean and the Indian Ocean or between the Atlantic Ocean and the Indian Ocean,and for the effects on the spatial distributions of the physical properties in CDW. 相似文献
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Based on the hydrographic data in austral summer during the 22nd Antarctic Expedition of China(2005/2006),some features can be found about the northern margin of Emery ice shelf as follows.The heat content in the surface layer(0-50 m) at the eastern end and the western end of the ice-shelf margin is much higher than that at the middle.The upper mixing-layer depth and the seasonal thermocline depth at the middle of the ice-shelf northern margin are much shallower than those at the both ends.However there is much less difference between the middle and the ends in the bottom layer.The remote sensing photos show that the inhomogeneity in the surface-layer water is closely related to the spatial distribution of the floes and polynia in the area. 相似文献