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根据2008-08-09～2008-08-13在南黄海西部绿潮(浒苔)暴发区取得的溶解有机碳(DOC)、颗粒有机碳(POC)和颗粒氮(PN)的分析数据,结合同步获得的水文环境要素资料,研究了该区域有机碳的分布特征、来源、影响因素以及浮游植物的固碳强度.结果表明,DOC的浓度范围为1.55～3.22mg/L,平均值为2.44mg/L;POC的浓度范围为0.11～0.68mg/L,平均值为0.27mg/L.DOC与POC的分布特征基本一致,呈现近岸高,外海低;表层高,底层低的趋势.POC与TSS的相关分析表明,POC与TSS整体上呈显著正相关,表明TSS的浓度和来源是控制POC浓度高低的重要因素.通过建立POC与PN的一元线性回归模型,估算了样品中PIN的含量.扣除样品中PIN的影响后,沿岸大部分海域POC/PON的平均值<8,结合POC/Chl-a比值,表明沿岸海域POC主要是海洋有机质来源,并且存在降解有机物,这可能是调查期间处于绿潮暴发后期,部分浒苔开始腐烂被降解所致.应用初级生产力估算的浮游植物固碳强度的结果表明,南黄海西部绿潮(浒苔)暴发区浮游植物的固碳强度变化范围为167～2017mg/(m2·d),平均为730mg/(m2·d),该区域日固碳量达到2.95×104t.换算至整个黄海,日固碳量为28.03×104t.
According to the data of dissolved organic carbon (DOC), particulate organic carbon (POC) and particulate nitrogen (PN) obtained from the 2008-08-09 ~ 2008-08-13 outbreaks in the western part of the South Yellow Sea, And the data of the hydrological environment elements obtained simultaneously were used to study the distribution characteristics, sources, influencing factors and the carbon sequestration intensity of phytoplankton in this area.The results showed that the DOC concentration ranged from 1.55 to 3.22 mg / L with an average value of 2.44 mg / L, the POC concentration ranged from 0.11 to 0.68 mg / L with an average of 0.27 mg / L. The distribution characteristics of DOC and POC were basically the same, showing the high nearshore sea level and the low sea level, Correlation analysis of TSS showed that there was a significant positive correlation between POC and TSS as a whole, indicating that concentration and source of TSS are important factors controlling the POC concentration.PIN content in samples was estimated by establishing a linear regression model of POC and PN. After deducting the influence of PIN in the samples, the average POC / PON values in most of the coastal areas were less than 8, and the POC / Chl-a ratio indicated that the POC in coastal waters was mainly derived from marine organic matter and organic matter was degraded, which may be due to Late outbreak of green tide, some Enteromorpha began to decay caused by degradation. The result of using the primary productivity to estimate phytoplankton carbon sequestration showed that the carbon fixation intensity of phytoplankton changed from 167 to 2017 mg / (m2 · d) in the western part of the South Yellow Sea, with an average of 730 mg / (m2 · D), the daily carbon sequestration in this area reached 2.95 × 104t, and the total amount of carbon sequestration in the Yellow Sea was 28.03 × 104t.