| 南亚地区季风与邻近海域海温相互影响的初步研究 |
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| 引用本文： | 刘莉红,郑祖光,夏友龙,吴洪.南亚地区季风与邻近海域海温相互影响的初步研究[J].气象学报,2004,62(2):180-188. |
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| 作者姓名： | 刘莉红 郑祖光 夏友龙 吴洪 |
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| 作者单位： | 中国气象局培训中心,北京,l00081 |
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| 基金项目： | 国家自然科学基金 ( 4 9875 0 18) |
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| 摘 要： | 文中利用简化的海 气耦合模式及低谱方法和多平衡态理论 ,讨论了南亚地区冬夏季风与邻近海域海温季节变化之间的相互影响。结果表明 :(1)冬季风较强时 ,冬季海温较低 ,翌年夏季海温也较低 ;反之亦然。夏季风较强时 ,夏季海温较高 ;反之亦然。夏季风强弱对冬季海温的影响不明显。 (2 )海 气相互作用使南亚冬季风和夏季风都加强。海温经向梯度使冬季风加强 ,而夏季风减弱。
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| 关 键 词： | 南亚季风 海表温度 海气耦合 低谱方法 多平衡态 |
| 收稿时间： | 3/3/2003 12:00:00 AM |
| 修稿时间： | 2003年3月3日 |
A PRIMARY STUDY OF INTERACTION BETWEEN MONSOON AND SEA-SURFACE TEMPERATURE IN THE NEIGHBORING SEA AREA IN SOUTH AISA |
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| Liu Lihong,Zheng Zuguang,Xia Youlong and Wu Hong.A PRIMARY STUDY OF INTERACTION BETWEEN MONSOON AND SEA-SURFACE TEMPERATURE IN THE NEIGHBORING SEA AREA IN SOUTH AISA[J].Acta Meteorologica Sinica,2004,62(2):180-188. |
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| Authors: | Liu Lihong Zheng Zuguang Xia Youlong and Wu Hong |
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| Institution: | China Meteorological Administration Training Center, Beijing 100081;China Meteorological Administration Training Center, Beijing 100081;China Meteorological Administration Training Center, Beijing 100081;China Meteorological Administration Training Center, Beijing 100081 |
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| Abstract: | From view point of air-sea interaction, in South Asia, winter and summer monsoon affect ocean current and sea temperature of neighborhood sea area, and ocean (especially ocean inclined temperature layer) also affects monsoon by redistributing heat flux and sea temperature. So it is significant to research South Asian air-sea interaction by dynamics method for understanding deeply the strongness or weakness of winter and summer monsoon as well as the mechanism of their transition. Nonlinear sea temperature equations and equator balance model were used in this paper. Air-sea interaction was introduced to the sea temperature equations, thus an ocean-atmospheric coupled model was made. The model contained two physical process: different imposed heat of land and ocean to atmosphere is the basic drive of monsoon; the distributing of sea temperature was changed by the wind blow flow of South Asian monsoon. This model is simplified to be the truncated spectrum model by low-order spectral method, which was easy to be discussed. Multi-equilibrium states and stability theory were used to discuss that winter and summer monsoon in South Asia affect sea temperature seasonal change of neighboring sea area respectively, and to discuss air-sea interaction and sea temperature longitudinal grads had an effect on monsoon. The main results were as follows: (1) When winter monsoon became stronger, sea-surface temperature became lower, and the sea-surface temperature in the next summer became lower too, vice versa. When summer monsoon became stronger, the sea-surface summer temperature became higher, vice versa. The effect of summer monsoon intensity to winter sea-surface temperature was not evident. (2) The air-sea interaction made winter and summer monsoon intense, and it made summer monsoon tend to sustain. (3) Sea-surface temperature longitudinal gradient strengthened winter monsoon, but weakened summer monsoon, and it made winter monsoon tend to sustain. Sea-surface temperature longitudinal gradient and air-sea interaction affected two equilibrium states unsymmetrical quality of winter and summer monsoon differently. The discussions are as follows: (1) There are a great difference between South and East Asian monsoon. In south Asia, sea and land distribute mainly south-north direction. When winter monsoon come, the off shore flow is generated, it make cool sea water upturn, and as monsoon become more strong, the off shore flow becomes more strong, seawater upturn more, and sea temperature become lower. Summer sea temperature is deeply affected by winter monsoon, and it shows by analyzing a lot of observation data that winter sea temperature characteristic can keep up to the next summer until to autumn. In this way, winter monsoon affects winter sea temperature firstly, and then it affects summer sea temperature. When summer monsoon comes in South Asia, sea current flows to coast, warm seawater stack at seacoast. As summer monsoon becomes stronger, warm seawater stack more and more, and sea temperature become higher. (2) The results obtained by the simple model verify some observation facts that South Asian monsoon interacted with sea temperature neighboring ocean area, and the reasonable discussion is presented. The results calculated from this paper are close to some observations and research over South China Sea. |
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| Keywords: | Southern Asian Monsoon Sea-surface temperature Air-sea coupled Low-order spectral method Multi-equilibrium states |
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