摘要
利用29个海洋观测站的31年(1980-2010年)水文气象观测资料,分析了中国沿海近31年冬季海平面的时空分布特征与长期变化趋势。结果表明:①中国沿海冬季海平面近31年呈现明显的上升趋势,平均上升速率为3.1 mm/a,高于全年的上升速率,渤海、黄海、东海和南海沿海冬季海平面变化呈现明显的区域特征;②中国沿海冬季海平面存在显著的年际和年代际变化,其主要显著变化周期有准2 a,4～7 a,9 a左右及18.6 a。由于受西太平洋暖池和黑潮与我国近海之间的水体交换影响,东中国海4～7 a的周期明显,其振幅最高,并且其周期性震荡的高位时期与赤道西太平洋暖池区的厄尔尼诺发生期间相吻合;③以浙江坎门(121°17′E,28°05′N)为界,中国沿海冬季海平面还呈现出南北变化反相的跷跷板特征,该现象反映了中国沿海冬季海平面的气候性特征。受季风、海流、气压以及降水等因素的影响,冬季海平面的变化区域特征明显;④近31年,中国沿海冬季气温、海温与海平面均呈显著上升趋势,上升幅度分别为1.8℃、1.4℃和135 mm,高于全年上升幅度。
Based on the marine hydrological and meteorological data during recent 31 years （1980-2010）, the winter sea level temporal and spatial distribution and long-term trend are investigated. The research results show： （1）The sea level in winter is increasing obviously along the coast of China, and the average rising rate of twenty nine stations is 3.1mm/yr, higher than the annual increase rate. Regional characteristics are obvious in Bohai Sea, Yellow Sea, East China Sea and South China Sea. （2）Also, the sea level in winter has obvious inter-annual and interdecadal variations. The main significant periods are 2 years, 4-7 years, 9 years and 18.6 years. Impacted by the western pacific warm pool and the Kuroshio, 4-7 year cycle is rather obvious in the East China Sea. Its amplitude is the highest, and the time of its periodic oscillations is consistent with that of the E1 Nino of the equatorial eastern pacific warm pool. （3）The sea level in winter also shows a pronounced south-north seesaw along the coast of China, which changes the sign near Kanmen station （121°17%, 28°05＇N ）. （4）In the past 31 years, China＇s coastal temperature, sea surface temperature and sea level show obvious increasing trend. Their increasing ranges are 1.8℃, 1.4℃ and 135mm, respectively.
出处
《海洋通报》
CAS
CSCD
北大核心
2011年第6期637-643,共7页
Marine Science Bulletin
基金
国家自然科学基金(41006002)
关键词
冬季海平面
长期上升趋势
时空变化
年际和年代际变化
winter sea level
long-term trend
temporal and spatial variation/change
inter-annual and interdecadal variations
