Renewal of the Drake Passage High Density XBT/XCTD Program

该项目是对德雷克航道上层海洋结构的季节变化和长期变化的研究。它由美国南极计划的考察船劳伦斯·M·古尔德在每次穿越时获得的高密度区段组成，使用一次性水温仪，辅之以消耗性电导率-温度-深度探头。这些信息将继续导致建立一个高质量的数据库，用来研究季节信号的穿透程度和深度、与大气强迫的联系以及年际变化的影响，例如与南极绕极波有关的影响。南极绕极流连接了大西洋、太平洋和印度洋的环流，为海洋间热量和盐分异常的转移提供了一条全球通道。德雷克航道是太平洋和南大西洋/印度洋系统之间财产交换的一个便利的狭窄阻塞点。这些部分将补充自1996年9月以来获得的大约40个部分。探测器由科学船上的人员在每次巡航中发射。***

This project is a study of the seasonal variability and long-term change of the upper ocean structure of the Drake Passage. It consists of high density sections obtained on each crossing by the U.S. Antarctic Program's research vessel Laurence M. Gould, using expendable bathythermographs, supplemented by expendable conductivity-temperature-depth probes. This information will continue to lead to the establishment of a high quality data base with which to study the magnitude and depth of penetration of the seasonal signals, connections to atmospheric forcing, and the effects of interannual variations such as those associated with the Antarctic Circumpolar Wave. The Antarctic Circumpolar Current links the circulation of the Atlantic, Pacific, and Indian Oceans, providing a global pathway for the interocean transfer of heat and salt anomalies. Drake Passage is a convenient narrow choke point for property exchange between the Pacific and the South Atlantic/Indian Ocean system. These sections will supplement the approximately forty sections have been obtained since September 1996. The probes are launched by the scientific shipboard personnel on each cruise. ***