| 不同ENSO位相热带中东太平洋与低纬度大气的信息传输不对称性研究 |
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| 引用本文： | 张志森,胡泊,封国林.不同ENSO位相热带中东太平洋与低纬度大气的信息传输不对称性研究[J].Acta Meteorologica Sinica,2016,74(2):165-175. |
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| 作者姓名： | 张志森 胡泊 封国林 |
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| 作者单位： | 国家气象信息中心, 北京, 100081;中国气象局气候研究开放实验室, 北京, 100081;兰州大学大气科学学院, 兰州, 730000,中国气象局气候研究开放实验室, 北京, 100081,中国气象局气候研究开放实验室, 北京, 100081;兰州大学大气科学学院, 兰州, 730000 |
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| 基金项目： | 国家重点基础研究发展计划 (2012CB955203)、国家自然科学基金(41205040、 41105055、 41305059)和公益性行业(气象)科研专项 (GYHY201306021)。 |
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| 摘 要： | 基于传递熵和再分析数据,讨论了不同ENSO位相下热带中东太平洋与其上空大气的信息传输,研究结果表明:厄尔尼诺、拉尼娜及中性状态下均是以海洋输出信息、大气输入信息为主导的特征,且海洋和大气输入和输出信息的空间分布型较类似。相对中性状态而言,厄尔尼诺和拉尼娜状态下,海洋和大气输入和输出的信息均较强;拉尼娜状态相比厄尔尼诺状态,海洋与大气输入和输出的信息要稍强。通过重排滑动随机抽样方法分析了热带中东太平洋与其上空大气信息传输强度与海温异常的关系,重点分析了热带中东太平洋与其上空大气信息传输的不对称性。揭示了海洋对大气的信息传输随海温距平的变化可以分为类拉尼娜、类中性状态及类厄尔尼诺3个阶段:类拉尼娜阶段,随着低海温的减弱信息传输逐渐减弱;类中性状态,低海温向高海温的过渡过程,信息传输并不存在显著的变化趋势;类厄尔尼诺,随着高海温的增强信息传输逐渐增强。热带中东太平洋与其上空大气信息传输的不对称性更表现为类拉尼娜和类厄尔尼诺阶段信息传输与海温异常之间建立线性关系的阈值和线性趋势程度的不对称。此外,大气对海洋的信息传输随海温的变化与海洋对大气的信息传输随海温的变化类似,即海洋对大气信息传输较强时,大气对海洋的信息传输同样较强,反之亦然,并且大气对海洋的信息传输随海温的变化同样存在不对称性。
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| 关 键 词： | 传递熵 ENSO 信息传输 不对称性 |
A study on the asymmetric information transfer between tropical central-eastern Pacific and low-latitude atmosphere during ENSO |
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| ZHANG Zhisen,HU Po and FENG Guolin.A study on the asymmetric information transfer between tropical central-eastern Pacific and low-latitude atmosphere during ENSO[J].Acta Meteorologica Sinica,2016,74(2):165-175. |
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| Authors: | ZHANG Zhisen HU Po and FENG Guolin |
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| Institution: | National Meteorological Information Center, Beijing 100081, China;Laboratory for Climate Studies, China Meteorological Administration, Beijing 100081, China;College of Atmospheric Sciences, Lanzhou University, Lanzhou 730000, China,Laboratory for Climate Studies, China Meteorological Administration, Beijing 100081, China and Laboratory for Climate Studies, China Meteorological Administration, Beijing 100081, China;College of Atmospheric Sciences, Lanzhou University, Lanzhou 730000, China |
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| Abstract: | In this article, information transfer over the tropical eastern Pacific is discussed in different ENSO phases based on Transfer Entropy (TE). Information transferred from ocean to the atmosphere is the main feature in both El Niño and La Nia phases and also in neutral phase. Compared to that in neutral phase, the intensity of information transfer is stronger in both El Niño and La Nia phases, while it is slightly stronger in La Nia phase than in El Niño phase. Using rearrangement of slide random samples (RSRS), the relationship between sea surface temperature anomalies (SSTA) over the tropical eastern Pacific and the intensity of information transfer is analyzed with a focus on the asymmetry of information transfer. Three stages are identified from the relationship: Liked La Nia, liked Neutral, and liked El Niño. As the negative SST anomalies weaken, information transfer weakens in the liked La Nia stage; as the negative SST anomalies gradually change to positive anomalies, information transfer does not exist significant changing trends in liked Neutral stage; as the positive SST anomalies intensify, information transfer enhances in liked El Niño stage. The asymmetry exists in the air-sea interaction. When information transferred from ocean to the atmosphere is stronger, information transferred from atmosphere to ocean is stronger, too. |
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| Keywords: | Transfer Entropy ENSO Information Transfer Asymmetry |
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