| 东海沿海季节性海平面异常成因 |
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| 引用本文： | 王慧,刘克修,齐冬梅,高志刚,范文静,张增健,王国松.东海沿海季节性海平面异常成因[J].海洋学报(英文版),2016,35(3):21-29. |
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| 作者姓名： | 王慧 刘克修 齐冬梅 高志刚 范文静 张增健 王国松 |
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| 作者单位： | 国家海洋信息中心, 天津 300171,国家海洋信息中心, 天津 300171,国家海洋信息中心, 天津 300171,国家海洋信息中心, 天津 300171,国家海洋信息中心, 天津 300171,国家海洋信息中心, 天津 300171,国家海洋信息中心, 天津 300171 |
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| 摘 要： | Based on the analysis of sea level, air temperature, sea surface temperature(SST), air pressure and wind data during 1980–2013, the causes of seasonal sea level anomalies in the coastal region of the East China Sea(ECS) are investigated. The research results show:(1) sea level along the coastal region of the ECS takes on strong seasonal variation. The annual range is 30–45 cm, larger in the north than in the south. From north to south, the phase of sea level changes from 140° to 231°, with a difference of nearly 3 months.(2) Monthly mean sea level(MSL)anomalies often occur from August to next February along the coast region of the ECS. The number of sea level anomalies is at most from January to February and from August to October, showing a growing trend in recent years.(3) Anomalous wind field is an important factor to affect the sea level variation in the coastal region of the ECS. Monthly MSL anomaly is closely related to wind field anomaly and air pressure field anomaly. Wind-driven current is essentially consistent with sea surface height. In August 2012, the sea surface heights at the coastal stations driven by wind field have contributed 50%–80% of MSL anomalies.(4) The annual variations for sea level,SST and air temperature along the coastal region of the ECS are mainly caused by solar radiation with a period of12 months. But the correlation coefficients of sea level anomalies with SST anomalies and air temperature anomalies are all less than 0.1.(5) Seasonal sea level variations contain the long-term trends and all kinds of periodic changes. Sea level oscillations vary in different seasons in the coastal region of the ECS. In winter and spring, the oscillation of 4–7 a related to El Ni?o is stronger and its amplitude exceeds 2 cm. In summer and autumn, the oscillations of 2–3 a and quasi 9 a are most significant, and their amplitudes also exceed 2 cm. The height of sea level is lifted up when the different oscillations superposed. On the other hand, the height of sea level is fallen down.
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| 关 键 词： | 海平面异常 ECS 风 气压 海温 气温 |
| 收稿时间： | 2014/11/14 0:00:00 |
| 修稿时间： | 2015/7/24 0:00:00 |
Causes of seasonal sea level anomalies in the coastal region of the East China Sea |
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| WANG Hui,LIU Kexiu,QI Dongmei,GAO Zhigang,FAN Wenjing,ZHANG Zengjian and WANG Guosong.Causes of seasonal sea level anomalies in the coastal region of the East China Sea[J].Acta Oceanologica Sinica,2016,35(3):21-29. |
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| Authors: | WANG Hui LIU Kexiu QI Dongmei GAO Zhigang FAN Wenjing ZHANG Zengjian and WANG Guosong |
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| Affiliation: | National Marine Data and Information Service, State Oceanic Administration, Tianjin 300171, China |
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| Abstract: | Based on the analysis of sea level, air temperature, sea surface temperature (SST), air pressure and wind data during 1980-2013, the causes of seasonal sea level anomalies in the coastal region of the East China Sea (ECS) are investigated. The research results show:(1) sea level along the coastal region of the ECS takes on strong seasonal variation. The annual range is 30-45 cm, larger in the north than in the south. From north to south, the phase of sea level changes from 140° to 231°, with a difference of nearly 3 months. (2) Monthly mean sea level (MSL) anomalies often occur from August to next February along the coast region of the ECS. The number of sea level anomalies is at most from January to February and from August to October, showing a growing trend in recent years. (3) Anomalous wind field is an important factor to affect the sea level variation in the coastal region of the ECS. Monthly MSL anomaly is closely related to wind field anomaly and air pressure field anomaly. Wind-driven current is essentially consistent with sea surface height. In August 2012, the sea surface heights at the coastal stations driven by wind field have contributed 50%-80% of MSL anomalies. (4) The annual variations for sea level, SST and air temperature along the coastal region of the ECS are mainly caused by solar radiation with a period of 12 months. But the correlation coefficients of sea level anomalies with SST anomalies and air temperature anomalies are all less than 0.1. (5) Seasonal sea level variations contain the long-term trends and all kinds of periodic changes. Sea level oscillations vary in different seasons in the coastal region of the ECS. In winter and spring, the oscillation of 4-7 a related to El Ni.o is stronger and its amplitude exceeds 2 cm. In summer and autumn, the oscillations of 2-3 a and quasi 9 a are most significant, and their amplitudes also exceed 2 cm. The height of sea level is lifted up when the different oscillations superposed. On the other hand, the height of sea level is fallen down. |
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| Keywords: | sea level anomalies ECS wind air pressure SST air temperature oscillations |
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