南沙群岛海区西南季风变化与表层流结构和演变关系的探讨

摘要

:Based on historical data and the in situ observational data of multidisciplinary oceanographic expedition to the Nansha Islands sea area, the relations have been discussed between southwest monsoon variation and sea surface circulation structure and evolution in the Nansha Islands. The study results show that the sea surface circulation structure in the west part of the study area changes with the southwest monsoon evolution, indicating that the sea surface current is controlled more by southwest monsoon in the west part than in the east part. The drift current component of sea surface current is not obvious due to the dominating density current and the topographic effects.%根据中国科学院南沙综合科学考察的现场资料和海区的历史资料，讨论了西南季风的变化及其与海区表层地转流的结构和演变间的关系。结果表明，海区西部的表层流结构随西南季风的盛衰而有变化，说明西南季风对南沙群岛海区表层流的调控作用西部大于东部；但由于密度流和地形效应等的作用，表层流的漂流性质不明显。