大亚湾大辣甲水域溶解无机碳垂直分布特征及季节动态

于2007年10月～2008年9月进行了4个季节的垂直采样监测,对大亚湾大辣甲水域溶解无机碳(DIC)的垂向分布和季节动态特征进行了研究,分析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。结果表明:在春、秋和冬季,大亚湾大辣甲水域DIC含量在垂直分布上差异较小,但夏季(2008年7月)变化较为显著,DIC含量的变化范围为16.79～26.52mg·L^-1;DIC高值基本集中在中、底层水域(8～16m),尤以底层水域(13～16m)为甚;DIC含量基本呈现出春、夏季较高,秋、冬季较低的分布趋势;DIC含量与pH值和水温含量显示出了负相关关系,而与盐度呈正相关关系。

Vertical distribution and seasonal variation of dissolved inorganic carbon in Dalajia water in the Daya Bay

We examined the vertical distribution and seasonal variation of dissolved inorganic carbon(DIC),and analyzed the correlation between DIC and other environmental factors in Dalajia water in the Daya Bay,after collecting the data in four different seasons from December 2007 to September 2008.The results showed that variation of vertical DIC distribution was low in spring,autumn,and winter,but it was high in summer.DIC varied from 16.79 to 26.52 mg·L^-1 in July 2008.The peak values of DIC were mainly found in middle and bottom water,especially in bottom water(13-16 m).The DIC showed a trend of being higher in spring and summer,but lower in autumn and winter.A negative correlation was found between DIC and pH and temperature.However,the DIC was positively correlated to salinity.