夏季南海西部中尺度物理过程对营养盐和叶绿素a分布特征的影响  

Mesoscale physical processes on the effects of distribution of nutrients and chlorophyll ain the western South China Sea in summer

作　　者：冷晓云[1,2] 杨阳[1,2] 孙军[1,2] 张桂成[1,2] 徐文喆 冯媛媛[1,2] 郭术津[1,2] 陈建芳[3,4] 王东晓[5] 

机构地区：[1]天津科技大学海洋与环境学院,天津300457 [2]天津科技大学天津市海洋资源与化学重点实验室,天津300457 [3]国家海洋局第二海洋研究所国家海洋局海洋生态系统与生物地球化学实验室,浙江杭州310012 [4]国家海洋局第二海洋研究所卫星海洋环境动力学国家重点实验室,浙江杭州310012 [5]中国科学院南海海洋研究所热带海洋国家重点实验室,广东广州310012

出　　处：《海洋学报》2016年第4期66-75,共10页

基　　金：教育部新世纪优秀人才计划(NCET-12-1065);国家自然科学基金(41176136;41276124;41306118;91128212);全球变化与海气相互作用"专项"(GASI-03-01-03-03)

摘　　要：通过对2014年8月31日—9月26日国家自然科学基金委南海西部综合航次的调查结果分析,发现在中南半岛沿岸海域存在具有低温高盐的冷涡和位于其东南部海域具有高温低盐的暖涡。相对于暖涡和其他海域,冷涡水团含有更高的营养盐,并在50m、75m和100m层增加明显,DIP分别高0.21μmol/L、0.39μmol/L和0.23μmol/L,DIN分别高4.94μmol/L、7.56μmol/L和3.76μmol/L,DSi分别高2.55μmol/L、5.25μmol/L和3.46μmol/L,说明冷涡对提高初级生产力具有明显的营养优势条件和巨大潜力;叶绿素a最大值均出现在50m层,其中以海南岛近岸海域最大,冷涡在25m层提高初级生产力明显,主要是受营养盐影响显著;而在75m、100m层可能受到冷涡带来的低温环境而导致叶绿素a含量不高。Samples for seawater nutrients and chlorophyll awere collected in the western South China Sea from 31 August to 26 September,2014.Results show that coast of IndoChina have cold-core eddy with low temperature,high salinity and warm-core eddy with high temperature,low salinity which is located in the lower right relative to cold-core eddy.Relative to warm-core eddy and other areas,nutrients of cold-core eddy have higher concentration,50 m,75mand 100 mlayer of which is increased remarkably.DIP higher by 0.21μmol/L,0.39μmol/L and 0.23μmol/L respectively,DIN higher by 4.94μmol/L,7.56μmol/L and 3.76μmol/L respectively,and DSi higher by2.55μmol/L,5.25μmol/L and 3.46μmol/L respectively.It indicates cold-core eddy on improving primary production with significant nutritional advantages and huge potential.DCM layer appear in 50 mlayer,maximum value of which is located in coast of Hainan island.Under the influence of nutrients,cold-core eddy increases primary productivity significantly in 25 mlayer,while value of Chl ais not high in 75 m,100mlayer,which may be caused by low temperature with cold-core eddy.

关 键 词：南海西部 营养盐 叶绿素A 

分 类 号：Q948.8[生物学—植物学]