崔虎山, 孙佳, 郭延良, 等, xxxx. 基于Argos漂流浮标资料的南海次中尺度涡识别及特征分析[J]. 海洋科学进展, x(x): xx-xx. doi: 10.12362/j.issn.1671-6647.20230712001.
引用本文: 崔虎山, 孙佳, 郭延良, 等, xxxx. 基于Argos漂流浮标资料的南海次中尺度涡识别及特征分析[J]. 海洋科学进展, x(x): xx-xx. doi: 10.12362/j.issn.1671-6647.20230712001.
CUI H S, SUN J, GUO Y L, et al, xxxx. Identification and feature analysis of submesoscale eddies in the South China Sea based on Argos drifters[J]. Advances in Marine Science, x(x): xx-xx. DOI: 10.12362/j.issn.1671-6647.20230712001
Citation: CUI H S, SUN J, GUO Y L, et al, xxxx. Identification and feature analysis of submesoscale eddies in the South China Sea based on Argos drifters[J]. Advances in Marine Science, x(x): xx-xx. DOI: 10.12362/j.issn.1671-6647.20230712001

基于Argos漂流浮标资料的南海次中尺度涡识别及特征分析

Identification and Feature Analysis of Submesoscale Eddies in the South China Sea Based on Argos Drifters

  • 摘要: 次中尺度涡作为连接中尺度涡和微小湍流之间的纽带,对海洋中能量串级和物质输运具有重要的影响。为了研究南海次中尺度涡特征,本文利用全球浮标计划中2000年至2022年进入南海的1 685个Argos漂流浮标,基于几何特征的拉格朗日涡识别方法,对南海次中尺度涡进行识别。 结果显示:共识别到11 988个次中尺度涡,包括9 985个反气旋涡和2 003个气旋涡,反气旋涡与气旋涡数量之比约为5∶1。空间分布上,次中尺度涡高频出现在南海北部,尤其是在吕宋海峡西北部陆坡海域,其次是在浅海岛屿附近海域;值得注意的是,在中南半岛南部,次中尺度气旋涡比较活跃。次中尺度涡的季节变化特征明显,冬季数量最多为3 303个,春季数量最少为2 704个,冬、夏季活跃,春、秋季较少。约90%的次中尺度涡生命周期在24 h以内,约83.8%的次中尺度涡半径在3 km以内,次中尺度涡的半径和生命周期呈显著正相关。

     

    Abstract: As the link between mesoscale eddies and micro turbulence, submesoscale eddies have important effects on energy cascade and mass transport in the ocean. In order to analyze and study the characteristics of submesoscale eddies in the South China Sea, this paper uses 1685 Argos drifters that entered the South China Sea from 2000 to 2022 in the Global Drifter Program and uses the Lagrange eddies identification method based on geometric features to identify submesoscale eddies in the South China Sea. A total of 11988 submesoscale eddies were obtained by consensus, of which 9985 were anticyclonic eddies and 2003 were cyclonic eddies. The ratio of anticyclonic eddies to cyclonic eddies was about 5:1. Last time, both submesoscale anticyclonic eddies and cyclonic eddies appeared in high frequency in the northern part of the South China Sea, especially in the northwest slope of the Luzon Strait, followed by the waters near the shallow sea islands. It is worth noting that the submesoscale cyclonic eddies were more active in the southern part of the Vietnam Peninsula. The number of submesoscale eddies was as high as 3303 in winter and as low as 2704 in spring. They were active in winter and summer, but less in spring and autumn. The life cycle of about 90% submesoscale eddies is less than 24 h, and the radius of about 83.8% submesoscale eddies is less than 3 km. The radius and life cycle of submesoscale eddies are significantly positively correlated.

     

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