2013年春季Wyrtki急流变异及成因分析
发布时间：2018-08-07 07:25
【摘要】：通过分析深海潜标系统的实际观测海流数据对2013年赤道印度洋上层Wyrtki急流(WJ)的变异进行了研究,发现WJ在2013年呈现明显异常变化,主要表现为春季WJ强度略强于同年秋季WJ。再分析资料的分析结果也同样验证此结论,而这与气候态WJ的演化特征相反。在气候平均态下,印度洋春季WJ强度远弱于秋季WJ强度。进一步数据分析与数值模式结果表明,2013年春季WJ异常加强与赤道印度洋海表风场变化密切相关,而春季海表风场的变化主要归因于2013年春季异常增强的季节内振荡(ISO)事件,发生在2013-05的ISO对流位相是导致春季印度洋海表西风异常的直接原因。本研究揭示了中小时间尺度海气相互作用可以影响更长时间尺度海洋环流系统的年际变化。
[Abstract]:The variation of Wyrtki jet (WJ) in the upper layer of the equatorial Indian Ocean in 2013 is studied by analyzing the observed current data of the deep-sea submarkage system. It is found that the variation of WJ in 2013 is obviously abnormal, which mainly shows that the intensity of WJ in spring is slightly stronger than that in autumn of the same year. The results of reanalysis also confirm this conclusion, which is contrary to the evolution of climatic WJ. The WJ intensity in the Indian Ocean in spring is much weaker than that in autumn in the mean climatic state. The results of further data analysis and numerical model show that the enhancement of WJ anomaly in spring 2013 is closely related to the variation of the sea surface wind field in the equatorial Indian Ocean, and the variation of the surface wind field in spring is mainly attributed to the intraseasonal oscillation (ISO) event, which is enhanced in the spring of 2013. The ISO convective phase occurred in 2013-05 is the direct cause of the Indian Ocean surface westerly anomaly in spring. In this study, it is revealed that the interaction between sea and air at medium and small time scales can influence the interannual variation of ocean circulation system in longer time scale.
【作者单位】： 国家海洋局第一海洋研究所海洋与气候研究中心;青岛海洋科学与技术国家实验室区域海洋动力学与数值模拟功能实验室;国家海洋局第一海洋研究所海洋环境数值模拟实验室;
【基金】：全球变化研究国家重大科学研究计划项目——太平洋印度洋对全球变暖的响应及其对气候变化的调控作用(2012CB955601) 国家自然科学基金项目——全球变暖背景下印度洋年际时间尺度海气相互作用对季节内振荡的影响(41376037) 国家自然科学基金委员会项目-山东省人民政府联合资助海洋科学研究中心项目——海洋环境动力学和数值模拟(U1606405) 全球变化与海气相互作用专项项目——季风变化对印度洋东部和南海南部上升流生态系统的影响(GASI-03-01-03-03);热带印度洋海洋过程与海气相互作用(GASIIPOVAI-02);太平洋-印度洋与亚洲季风的相互影响(GASI-IPOVAI-03);东印度洋南部水体综合调查春、秋航次(GASI-02-IND-STSspr,GASI-02-IND-STSaut)
【分类号】：P731.2;P732
，
本文编号：2169293
[Abstract]:The variation of Wyrtki jet (WJ) in the upper layer of the equatorial Indian Ocean in 2013 is studied by analyzing the observed current data of the deep-sea submarkage system. It is found that the variation of WJ in 2013 is obviously abnormal, which mainly shows that the intensity of WJ in spring is slightly stronger than that in autumn of the same year. The results of reanalysis also confirm this conclusion, which is contrary to the evolution of climatic WJ. The WJ intensity in the Indian Ocean in spring is much weaker than that in autumn in the mean climatic state. The results of further data analysis and numerical model show that the enhancement of WJ anomaly in spring 2013 is closely related to the variation of the sea surface wind field in the equatorial Indian Ocean, and the variation of the surface wind field in spring is mainly attributed to the intraseasonal oscillation (ISO) event, which is enhanced in the spring of 2013. The ISO convective phase occurred in 2013-05 is the direct cause of the Indian Ocean surface westerly anomaly in spring. In this study, it is revealed that the interaction between sea and air at medium and small time scales can influence the interannual variation of ocean circulation system in longer time scale.
【作者单位】： 国家海洋局第一海洋研究所海洋与气候研究中心;青岛海洋科学与技术国家实验室区域海洋动力学与数值模拟功能实验室;国家海洋局第一海洋研究所海洋环境数值模拟实验室;
【基金】：全球变化研究国家重大科学研究计划项目——太平洋印度洋对全球变暖的响应及其对气候变化的调控作用(2012CB955601) 国家自然科学基金项目——全球变暖背景下印度洋年际时间尺度海气相互作用对季节内振荡的影响(41376037) 国家自然科学基金委员会项目-山东省人民政府联合资助海洋科学研究中心项目——海洋环境动力学和数值模拟(U1606405) 全球变化与海气相互作用专项项目——季风变化对印度洋东部和南海南部上升流生态系统的影响(GASI-03-01-03-03);热带印度洋海洋过程与海气相互作用(GASIIPOVAI-02);太平洋-印度洋与亚洲季风的相互影响(GASI-IPOVAI-03);东印度洋南部水体综合调查春、秋航次(GASI-02-IND-STSspr,GASI-02-IND-STSaut)
【分类号】：P731.2;P732
，
本文编号：2169293
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