南海溶解氧垂直结构的季节变化分析  

Analysis of Vertical Structure and Seasonal Variation of the Dissolved Oxygen in the South China Sea

作　　者：刘洋[1] 鲍献文[1] 吴德星[1] 

机构地区：[1]中国海洋大学海洋环境学院物理海洋实验室,山东青岛266100

出　　处：《中国海洋大学学报（自然科学版）》2011年第1期25-32,共8页Periodical of Ocean University of China

基　　金：国家自然科学基金项目(40976001);国家重点基础研究发展计划项目(2005CB422302);国家建设高水平大学公派研究生项目(留金出[2007]3020)资助

摘　　要：溶解氧在生物活动较小的情况下,与温盐相似,同样具有保守性。本文基于WOD05数据集中实际观测的溶解氧标准层资料,对南海溶解氧的垂直结构及其季节变化进行阐述,指出在浅水陆架区、中央海盆和吕宋岛以东深水区,溶解氧具有不同的垂向分布特点。重点分析了深水区的溶解氧垂向结构,发现其极大值存在季节性变化,量值在冬、春较大,夏、秋较小,出现的深度夏季最深,超过50 m,秋、冬较浅且现象不够明显;极小值基本不存在季节变化,出现的深度约860 m;对比温盐关系曲线,发现溶解氧极大值对应着南海次表层水团上界、衰减缓慢的稳定阶段对应次表层水团高盐核心水层、而极小值则对应中、深层水团的交界。Dissolved Oxygen（DO） can be used in the water mass analysis just like the conservative elements——temperature and salinity when the influence of biological processes is limited.Based on the historical standard-layer data from WOD05 data base,a detailed analysis is made on the vertical structure and seasonal variation of dissolved oxygen in the South China Sea（SCS）.The result shows that the different vertical distributions of DO are figured out among the shallow sea on the continent shelf,the deep sea in the central of SCS and the east region of Luzon Island.Focusing on the deep sea,a maximum and a minimum are showed in the water vertically.There is a seasonal variation for the maximum phenomenon： the values are higher in winter and spring than those in summer and autumn,the seasonal mean depth of DO maximum is 50 m in summer and it is the deepest among the four seasons.The minimum is nearly unchanged through out the year and the corresponding depth is about 860m,far away from the core of intermediate water in the SCS.Contrasting with the seasonal mean T-S curves,the corresponding depths and characteristics of DO maximum,minimum and the part of DO content reduces slowly have better relations with the subsurface water and intermediate water.

关 键 词：南海 溶解氧 水团 季节变化 

分 类 号：P731[天文地球—海洋科学]