加利福尼亚流系流场的季节性演变

发布时间：2018-05-26 12:55

本文选题：加利福尼亚流系 + 近岸上升流区　；参考：《海洋与湖沼》2016年03期

【摘要】：本文利用三维数值模型(ROMS-Co Si NE)分析了整个加利福尼亚流系水平流场的季节性演变过程,研究了美国加州中部海域流场垂直结构的季节性变化特征,并探讨了其动力学机制。研究发现:(1)数值模型能够较为准确的模拟流场的季节性变化,与浮标观测数据以及前人的研究结果符合良好;(2)从表层到200m,加利福尼亚潜流向高纬度扩张,近岸上升流急流则向高纬度撤退,加州南部海域的中尺度涡更显著;(3)在加州中部海域,近岸急流的最大值(约15cm/s)发生在夏季,位于近岸的表层海域;加利福尼亚潜流最大值(约4cm/s)发生于冬季,出现在离岸100km的125m处;加利福尼亚流在春季达到全年最大值(约5cm/s),流轴位于离岸(400—600km)的表层海水。加利福尼亚流系的流场具有显著的季节性变化,研究进一步表明这主要受地转关系调控。
[Abstract]:In this paper, the seasonal evolution process of the horizontal flow field of the entire California current system is analyzed by using the three-dimensional numerical model ROMS-Co Si (NEE). The seasonal variation characteristics of the vertical structure of the current field in the central California sea area are studied, and its dynamic mechanism is discussed. It is found that the numerical model can accurately simulate the seasonal variation of the flow field, which is in good agreement with the buoy data and previous research results.) from the surface to 200m, the California submersible current extends to the high latitudes. The coastal upwelling jet retreats to higher latitudes, and the mesoscale vortex in southern California is more pronounced in central California. The maximum inshore jet (about 15 cm / s) occurs in summer and lies in the surface waters of the inshore. The maximum value of California subsurface current (about 4 cm / s) occurred in winter, which occurred at 125 m of offshore 100km, and the California current reached its annual maximum in spring (about 5 cm / s / s). The seasonal variation of the flow field in California shows that it is mainly controlled by geostrophic relationships.
【作者单位】：中国海洋大学;中国科学院南海海洋研究所热带海洋环境国家重点实验室;澳大利亚联邦科学与工业研究组织海洋与大气研究所;
【基金】：广东省杰出青年科学基金项目,2014A030306049号
【分类号】：P731.2

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