| 中国近海海平面变化与ENSO的关系 |
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| 引用本文： | 王慧,刘克修,张琪,范文静,高志刚,张增建,李琰.中国近海海平面变化与ENSO的关系[J].海洋学报,2014,36(9):65-74. |
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| 作者姓名： | 王慧 刘克修 张琪 范文静 高志刚 张增建 李琰 |
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| 作者单位： | 1.国家海洋信息中心,天津 300171 |
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| 基金项目： | 海洋公益专项(201005019);十二五科技支撑(2012BAC21B0101);国家自然科学基金(41106004)。 |
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| 摘 要： | 利用中国沿海台站潮位和中国近海及赤道太平洋的卫星测高、海表温度、风及气压资料,分析了中国近海海平面变化与ENSO的关系。分析结果表明:中国沿海海平面季节变化受ENSO影响明显,在厄尔尼诺事件期间,中国沿海海平面Sa分潮的振幅明显减小,其中年振幅的历史极小值均出现厄尔尼诺年,不同区域历史极小值出现的年份不同;另外,中国沿海Sa分潮的振幅对厄尔尼诺事件的响应与其强弱有关,在强事件中,响应区域和幅度较大,弱事件中,响应区域和幅度偏小。在厄尔尼诺年,中国沿海海平面多低于相邻年份,并且其年际变化存在明显的2~3a、4~7a、准9a、11a和准19a的周期,其中4~7a的周期在冬春季节震荡最显著,其震荡幅度接近2cm。中国近海海平面与赤道东太平洋区域的海表温度年际变化之间存在反相关关系,其相关系数为-0.42;同时与Nio4和Nio3.4指数序列也呈现反相关关系。针对典型的1997/1998年尼诺事件发生前后的风场和气压场分析发现,尼诺发生前的冬半年,冬季风偏强,气压梯度加强,中国沿海海平面偏低;到了厄尔尼诺的盛期,出现较强的南风异常,气压梯度反向,季风转向,过渡到了厄尔尼诺事件的衰减期,为拉尼娜事件做准备,此时海平面偏高。
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| 关 键 词： | 海平面 海温 ENSO 季风 |
| 收稿时间： | 2013/9/23 0:00:00 |
| 修稿时间： | 2014/1/21 0:00:00 |
The relationship between sea level change of China’s coast and ENSO |
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| Wang Hui,Liu Kexiu,Zhang Qi,Fan Wenjing,Gao Zhigang,Zhang Zengjian and Li Yan.The relationship between sea level change of China’s coast and ENSO[J].Acta Oceanologica Sinica (in Chinese),2014,36(9):65-74. |
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| Authors: | Wang Hui Liu Kexiu Zhang Qi Fan Wenjing Gao Zhigang Zhang Zengjian and Li Yan |
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| Institution: | 1.National Marine Data & Information Service,Tianjin 300171,China2.Ocean University of China,Qingdao 266003,China |
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| Abstract: | Based on the tide level data of tide gauge stations and satellite altimeter,sea surface temperature,air pressure ,wind etc hydrological and meteorological data in the region of eastern equatorial Pacific,the relationship between the sea level change of China coastal area and ENSO are investigated. The research results show that the sea level of China coastal area is affected by ENSO obviously. Annual and semiannual amplitude of tide level decreased significantly in El Niño events. The minimum value of annual amplitude all appeared in El Niño years,but different regions happened in different years. In addition,the Sa tidal amplitude of China coastal in response to El Niño events related its strength. Response area and magnitude is bigger in strong events,response area and magnitude is smaller in weak events. In El Niño events,the sea level was lower than adjacent years,the MSL also shows prominent inter-annual and inter-decade variation besides the seasonal variation,the prominent terms are 2~3 a,4~7 a,9 a,11 a and 19 a,the oscillation of 4~7 a is the most prominent. There is a significant negative correlation between the MSL in China coastal area and SST in the central and eastern equatorial Pacific,it also shows negative correlation with Niño4 and Niño3.4 indices prominently. In typical El Niño event,the winter monsoon is strong in the winter half year before the occurrence of El Niño event,the pressure gradient is strengthened and the sea level is low in China coastal area. on the contrary,in the winter half year before the occurrence of La Niña event,the winter monsoon is weak,the pressure gradient is weaken and the sea level is high in the coast of China. |
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| Keywords: | sea level SST ENSO monsoon |
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