大亚湾表层水中溶解无机碳的时空分布  

Spatial-temporal distribution of dissolved inorganic carbon in surface waters of Daya Bay,China

作　　者：黄道建[1] 于锡军[1] 郭振仁[1] 綦世斌[1] 王雄[1] 陈婵[1] 黄献华[1] 

机构地区：[1]环境保护部华南环境科学研究所,广州510655

出　　处：《生态科学》2013年第3期331-337,共7页Ecological Science

基　　金：环保公益性行业科研专项-近岸海域环境与生态数字化实时管理系统(200909046);环境保护部华南环境科学研究所中央级公益性科研院所基本科研业务专项-大亚湾南海石化排污口海域海水有机碳的分布特征及其对有机污染的指示研究

摘　　要：于2010年12月～2011年11月分4个季度,对大亚湾海域进行了采样调查,分析了大亚湾表层水体中溶解无机碳(Dissolved inorganic carbon,DIC)含量的时空分布特征,并讨论了大亚湾表层水DIC与pH、盐度、水温和叶绿素a等环境因子之间的关系。大亚湾海域表层水DIC含量的变化范围为19.49～23.20 mg.L-1,均值为21.13±1.07 mg.L-1,较黄海及东海水域的DIC含量低。DIC的水平分布大致呈现出西部及西北部海域高于东部及湾口海域的趋势。大亚湾表层水DIC含量呈现出冬季>夏季>秋季>春季的季节变化趋势,但春、夏及秋季差异不大。大亚湾海域表层水的DIC含量除与盐度呈现了显著的正相关关系外,与pH值、水温及叶绿素a显示出负相关,但不显著。大亚湾海域DIC的时空分布特征是多种因素综合作用的结果,其同时受季风、水温、盐度、水动力、生物地球化学和生物等因子的影响。Dissolved inorganic carbon （DIC） in the surface water of the Daya Bay, China was investigated to analyze its temporal and spatial distribution in four different seasons during December 2010 to November 2011, and its influence aspects were also discussed. The results showed that the surface DIC concentration ranged from 19.49 to 23.20 mg·L^-1, with average concentration of 21.13±1.07 mg·L^-1, lower than that in the Yellow Sea and the East China Sea. Higher concentrations of DIC in surface waters were found in the northern ＆ northwestern area, and lower concentrations in the eastern ＆ outside sea area of Daya Bay. The temporal distribution of DIC was in the order of but no significant differences were found among spring, summer and autumn. The DIC was found to be positively correlated with salinity, and negatively correlated with pH, temperature and chlorophyll a, but the correlation coefficient was not significant with the three environmental factors. The temporal and spatial variations of DIC were interpreted relative to monsoonal forcing, water temperature, salinity, hydrographic and biogeochemical features, organisms and so on.

关 键 词：大亚湾 表层水体 溶解无机碳 时空分布 

分 类 号：P67[天文地球—海洋地质]