West Coast Physical Oceanography on the Africana Voyage 025, October 1984

The objectives of this cruise included studying shelf circulation in the vicinity of Port Nolloth by placing three current meter moorings across the shelf; exploring the deep circulation in the Cape Basin which is thought to be a driving mechanism for the preponderance of southward flow observed on the shelf by placing a current meter in 3000m of water; recovering one current meter in the Cape Canyon and deploying two current meter moorings and a thermistor string near Cape Columbine and obtaining Conductivity-Temperature-Depth (CTD) data at these sites; collecting chemical samples and CTD data along a line between Port Nolloth to the deep current meter site, this included 100ml samples for analysis by M.J. Orren on routine CTD casts; a line of six coastal CTD stations was to be worked in the Hondeklipbaai upwelling tongue; the surface flow over the 1000m contour was to be studied using an acoustic drifter and samples were to be taken at various CTD stations for nitrogen cycling studies.

本次巡航的目标包括：通过在陆架上布设三组流速仪锚系，研究诺洛斯港（Port Nolloth）附近的陆架环流；在3000米水深处布设一台流速仪，探索开普盆地（Cape Basin）的深层环流——该环流被认为是陆架上观测到的南向流占主导地位的驱动机制；回收开普峡谷（Cape Canyon）的一台流速仪，并在开普哥伦布（Cape Columbine）附近部署两组流速仪锚系和一条热敏电阻串，同时获取这些站点的温盐深（Conductivity-Temperature-Depth，CTD）数据；沿诺洛斯港至深层流速仪站点的剖面线采集化学样本和CTD数据，其中包括供M.J. Orren在常规CTD投放中分析的100毫升样本；在洪德克利普拜（Hondeklipbaai）上升流舌区设置六个近岸CTD站点并开展观测；利用声学漂流仪研究1000米等深线处的表层流，并在多个CTD站点采集样本用于氮循环研究。