冬季南黄海海水化学要素的分布特征及变化趋势  

Distribution Features and Variation Tendency of Chemical Elements in the Southern Yellow Sea in Winter

作　　者：韦钦胜[1,2,3] 周明[1,2] 魏修华[1,2] 臧家业[1,2] 战闰[1,2] 

机构地区：[1]国家海洋局第一海洋研究所,山东青岛266061 [2]海洋生态环境科学与工程国家海洋局重点实验室,山东青岛266061 [3]中国海洋大学海洋化学理论与工程技术教育部重点实验室,山东青岛266100

出　　处：《海洋科学进展》2010年第3期353-363,共11页Advances in Marine Science

基　　金：中国近海海洋综合调查与评价专项课题--ST03区块水体环境调查与研究(908-01-ST03)

摘　　要：通过分析2007年1月12日—2月4日南黄海调查所得资料,对海水化学要素的分布特征及变化趋势进行了研究。结果表明:1)在大部分海域,表、底层海水化学要素分布基本呈现上下均匀状态,这是冬季强烈的垂直混合作用的结果,同时黄海西部沿岸流、台湾暖流前缘水、东海北部的气旋式涡旋和黄海暖流也对各要素的分布发挥着重要的影响。2)调查海域中北部122°30′～124°00′E,34°42′～36°42′N范围内,底层黄海暖流的增温增盐效应较强,且水体垂直混合作用并未到达海底,近底层有跃层存在,使底层水既保留了夏季黄海冷水团水的特性,同时又由于黄海暖流的入侵而具有暖水的性质,跃层和夏季冷水团残留水为溶解氧(DO)和pH低值区的产生以及营养盐高值区的出现提供了良好的水文条件或动力因素。生物化学作用则是形成上述现象的内在原因,而且该跃层也阻碍了各生源要素的垂向输运,使底层水与底层以上水体具有明显不同的生化性质。3)冬季南黄海各化学要素除具有垂直均匀分布的特点外,在中北部各断面东侧还存在层化现象或锋面结构,表现为上层的垂直均匀分布和下层的梯度分布,这也是该海域近底层水体层化以及黄海暖流较强的增温增盐效应所致。The data obtained from the survey in the Southern Yellow Sea in January 12～February 4,2007 are analyzed to study the distribution features and variation tendency of the marine chemicals.As it is shown in the results,firstly in the most of the sea area,the distribution of chemical elements is homogene-ous from the surface to the bottom,and it results from the strong vertical-mixing in winter.At the same time,the coastal current in the Western Yellow Sea,the marginal waters of the Taiwan Warm Current,the cyclonic eddy in the northern East China Sea,and the Yellow Sea Warm Current respectively play an important role in the distribution of the marine chemicals.Secondly,in the bottom water of the area ran-ging in 122°30′～124°E,34°42′～36°42′N i.e.in the north and the middle of the surveyed area,where the warming and saline influx effects of the Yellow Sea Warm Current become stronger,and the vertical mixing is limited within the upper layer,the thermocline appears in the water closely above the bottom lay-er in which some characteristics of the Yellow Sea Cold Water Mass remains from the summer time and some features of the warm water are given by the Yellow Sea Warm Current intrusion.It is the thermo-cline layer existence and the cold water remaining from summer time that provide favourable hydrographic conditions and dynamic factors for the lower DO and pH values,and the nutrient-rich places.Then the bi-ochemical effects become the inherent reason for the phenomena describled above.In addition,the thermo-cline layer plays an unfavourable role in the vertical transport of biogenic elements.Therefore the biochem-ical characteristics in the bottom layer are obviously different from those in the upper layer.Thirdly,al-though the chemical elements have their vertical homogeneous distributions in the most parts of the south-ern Yellow Sea in winter,the stratification phenomena and frontal structures appear in the eastern seg-ments of the sections in the northern and middle parts of the surveyed area,where t

关 键 词：南黄海 化学要素 分布特征 黄海暖流 增温增盐效应 跃层 

分 类 号：P734.2[天文地球—海洋化学]