| YIN Ming,LI Xin,XIAO Ziniu,LI Chongyin.Relationships between intensity of the Kuroshio current in the East China Sea and the East Asian winter monsoon[J].Acta Oceanologica Sinica,2018,37(7):8-19 |
| 东海黑潮强度与东亚冬季风关系的分析研究 |
| Relationships between intensity of the Kuroshio current in the East China Sea and the East Asian winter monsoon |
| 投稿时间：2017-08-16 |
| DOI：10.1007/s13131-018-1240-2 |
| 中文关键词: 东亚冬季风 黑潮强度 东海 相互作用 相关分析 合成分析 |
| 英文关键词:East Asian winter monsoon Kuroshio intensity East China Sea interaction correlation analysis composite analysis |
| 基金项目:The National Basic Research Program (973 program) of China under contract No. 2013CB956200; the National Natural Science Foundation of China under contract Nos 41490642 and 41605051. |
| 作者 | 单位 | E-mail | | 殷明 | 中国人民解放军61936部队, 海口, 571100
国防科技大学气象海洋学院, 南京, 211101 | | | 黎鑫 | 中国科学院大气物理研究所, 大气科学和地球流体力学数值模拟国家重点实验室, 北京, 100029
国防科技大学气象海洋学院, 南京, 211101 | | | 肖子牛 | 中国科学院大气物理研究所, 大气科学和地球流体力学数值模拟国家重点实验室, 北京, 100029 | | | 李崇银 | 中国科学院大气物理研究所, 大气科学和地球流体力学数值模拟国家重点实验室, 北京, 100029
国防科技大学气象海洋学院, 南京, 211101 | lcy@lasg.iap.ac.cn |
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| 中文摘要: |
| 利用卫星高度计资料和再分析资料，本文分析研究了东海黑潮强度与东亚冬季风的关系，并初步探讨了二者相互作用的可能机制。结果表明，位置相近的断面，其流强变化具有相似的特征；在年际尺度上，冬季风与东海黑潮存在相互作用。当冬季风偏强，将削弱次年2-4月SC、SD断面的流强，弱冬季风年的情况相反。冬季风对流强影响的动力过程主要通过改变Ekman输送来实现；热力过程则表现为强（弱）冬季风增大（减少）了黑潮向大气释放的热通量，从而削弱（增强）流强，这一过程主要为冬季风对黑潮的影响。当冬季风偏强时，次年10-12月黑潮中下游流强偏弱，弱冬季风年的情况相反。这一过程与2-4月情况不同，其热力过程主要表现为黑潮对冬季风的影响。强冬季风通过准两年振荡对次年冬季的黑潮流强产生影响，由此构成了一个包含海洋和大气耦合过程的正反馈机制。黑潮流域的海气相互作用过程可能受冬季风和黑潮流强相对强弱的调制，海洋过程和大气过程主导一方的转换中存在一个“临界值”。 |
| 英文摘要: |
| Based on satellite altimeter and reanalysis data, this paper studies the relationships between the intensity of the Kuroshio current in the East China Sea (ECS) and the East Asian winter monsoon (EAWM). The mechanisms of their possible interaction are also discussed. Results indicate that adjacent transects show consistent variations, and on an interannual timescale, when the EAWM is anomalously strong (weak), the downstream Kuroshio in the ECS is suppressed (enhanced) in the following year from February to April. This phenomenon can be attributed to both the dynamic effect (i.e., Ekman transport) and the thermal effect of the EAWM. When the EAWM strengthens (weakens), the midstream and downstream Kuroshio in the ECS are also suppressed (intensified) during the following year from October to December. The mechanisms vary for these effects. The EAWM exerts its influence on the Kuroshio's intensity in the following year through the tropospheric biennial oscillation (TBO), and oceanic forcing is dominant during this time. The air-sea interaction is modulated by the relative strength of the EAWM and the Kuroshio in the ECS. The non-equivalence of spatial scales between the monsoon and the Kuroshio determines that their interactions are aided by processes with a smaller spatial scale-i.e., local wind stress and heating at the sea surface. |
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