| 基于CORA2再分析数据的南海中尺度涡时空分布特征初步研究 |
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| 引用本文： | 白志鹏,韩君,郭贤鹏,朱科澜.基于CORA2再分析数据的南海中尺度涡时空分布特征初步研究[J].海洋预报,2020,37(2):73-83. |
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| 作者姓名： | 白志鹏 韩君 郭贤鹏 朱科澜 |
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| 作者单位： | 中国人民解放军61741部队,北京100094;中国人民解放军61741部队,北京100094;中国人民解放军61741部队,北京100094;中国人民解放军61741部队,北京100094 |
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| 摘 要： | 利用南海20 a逐日海流再分析资料对南海海域中尺度涡进行时空特征分析。经过数据处理、涡漩识别、统计分析等方法,对南海海域中尺度涡空间分布、时间分布、生命周期、空间尺度、移动路径、移动速度、影响频率等特征进行分析,对南海中尺度涡进行全面详细的解读。研究发现:涡旋出现位置跟南海200 m等深线较一致。大部分涡旋周期都集中在30 d以内,直径大都在100~300 km,主要向西南方向移动,速率在15~20 cm/s的涡旋比例最高。反气旋式中尺度涡影响频率要大于气旋式中尺度涡的影响频率,主要影响区域大致在200 m等深线以内海域。
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| 关 键 词： | 中尺度涡 南海 再分析资料 |
Spatial and temporal distribution characteristics of mesoscale eddies in the South China Sea based on the CORA2 reanalysis data |
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| BAI Zhi-peng,HAN Jun,GUO Xian-peng,ZHU Ke-lan.Spatial and temporal distribution characteristics of mesoscale eddies in the South China Sea based on the CORA2 reanalysis data[J].Marine Forecasts,2020,37(2):73-83. |
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| Authors: | BAI Zhi-peng HAN Jun GUO Xian-peng ZHU Ke-lan |
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| Institution: | (NO.61741 Army of PLA,Beijing 100094 China) |
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| Abstract: | In this paper, the spatial and temporal distribution characteristics of mesoscale eddies in the South China Sea are analyzed using the 20-years daily current reanalysis data. Based on methodologies including data processing, eddy identification and statistical analysis, the spatial and temporal distribution, life cycle, spatial scale, propagating path and speed, influence frequency of mesoscale eddies in the South China Sea are revealed.The results show that the eddies are mostly observed near the 200 m isobath of the South China Sea. The life cycle of most eddies is less than 30 days with a diameters of 100~300 km. The majority of eddies propagate southwestward with a speed of 15~20 cm/s. The anti-cyclonic mesoscale eddies influence frequency is more significant than that of the cyclonic mesoscale eddies, and mainly affect the area shallower than 200 m in the South China Sea. |
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| Keywords: | mesoscale eddy the South China Sea reanalysis data |
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