大亚湾春季溶解无机碳的分布特征

Distribution characteristics of dissolved inorganic carbon in the Daya Bay in spring

于2010年5月对大亚湾溶解无机碳(DIC)进行采样调查,分析了大亚湾溶解无机碳空间分布特征,并讨论了大亚湾溶解无机碳与各环境要素(pH、水温、溶解氧和叶绿素a等)的相关性。大亚湾表层水域的DIC含量在24.26～26.13mg.L-1之间;底层水域的DIC含量在24.06～26.89mg.L-1之间。大亚湾表层水体中DIC含量的高值区集中在大辣甲-桑洲连线以北水域,然后呈现出向四周逐渐递减的分布趋势;底层水体中DIC含量高值区集中于西南部水域(大辣甲南部),总体呈现出由南部向北部逐渐递减的分布趋势。大亚湾DIC与水温和叶绿素a呈现负相关系,与pH、DO和盐度呈现正相关关系,但从相关的显著性来看,DIC与以上各环境因子的相关系数均不高。

Dissolved inorganic carbon （DIC） in the waters of the Daya Bay was investigated to analyze its spatial distribution in May 2010, and to discuss the correlation between DIC and other environmental factors. The values of DIC ranged from 24.26 to 26.13mgL^-1 at surface waters, and at the bottom layer waters the values ranged from 24.06 to 26.89 mgL^-1. The high values of DIC at surface were found at the north area of DalajiaSangzhou line, and they were gradually decreased outside. At the bottom layer, the high values were in the south west region, namely, the south of Dalajia. The DIC was found to be negatively correlated with temperature and chlorophyll a, but positively correlated with pH, DO and salinity. Nevertheless, the correlation coefficients were not significant with the environmental factors.