| 摘要: |
| 利用卫星观测的OLR（Outgoing Longwave Radiation）候平均资料（1979–1993年）分析热带东印度洋－西太平洋海域大气对流季节内振荡的空间分布特征。发现热带东印度洋－西太平洋海域（35°N－35°S，75°E－180°E）大气对流运动的季节内振荡在4个区域中表现较明显：(1)热带东印度洋大气对流季节内振荡信号最强，显著的振荡周期集中在6.5–12.5候；(2)澳大利亚西北洋面季节内振荡强信号主要周期表现为9.5–15.5候；(3)澳大利亚东北洋面振荡周期集中在6.5–9.5候和9.5–15.5候，南半球的大气对流活动季节内振荡显著区沿10°S呈纬向带状分布；(4)南海北部、吕宋海峡附近及日本群岛以南的西北太平洋区域。ISO振荡周期集中在6.5–12.5候，南海南部季节内振荡周期集中在6.5–15.5候。 |
| 关键词: 热带东印度洋-西太平洋 大气对流 季节内振荡 分布特征 |
| DOI：10.11693/hyhz200001013013 |
| 分类号: |
| 基金项目:国家自然科学基金资助项目，49776286号 |
附件 |
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| THE DISTRIBUTION CHARACTERISTICS OF INTRASEASONAL OSCILLATION OF THE OLR IN TROPICAL EASTERN INDIA OCEAN-WESTERN PACIFIC OCEAN |
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WANG Shao-xia, LIU Qin-yu, XU Qi-chun
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Institute of Physical Oceanography, Ocean University of Qingdao, Qingdao, 266003
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| Abstract: |
| In order to understand the distribution characteristics of the Intraseasonal Oscillation (ISO) of the atmosphere convection in tropical eastern India Ocean-Western Pacific Ocean, long-period pentad mea OLR (Outgoing Longwave Radiation) data (1979–1993) collected by satellite are studied using the power spectrum analysis. The results reveal that there are four regions in which the ISO signal is significant.
(1) ISO signal concentrates on the Equator over the tropical eastern India Ocean. ISO period is mainly quasi-6.5–12.5-pentad;
(2) ISO signal in the northwestern part of Australia appears quasi-6.5–15.5-pentad oscillation period;
(3) ISO signal in the northeastern part of Australia seems complex. Both quasi-6.5–9.5-pentad and quasi-9.5–15.5-pentad oscillation periods exist;
(4) The northern part of the South China Sea, Luzon Strait and southern areas of Japan archipelago northern Pacific Ocean are associated with quasi-6.5–12.5-pentad; oscillation while the southern part of the South China Sea ISO period is quasi-6.5–15.5-pentad. |
| Key words: Tropical eastern India Ocean-Western Pacific Ocean, Convection of atmosphere, Intraseasonal Oscillation, The distribution characteristics |
