北极楚科奇海地区沉积物生源物质的来源和分布

SOURCE AND DISTRIBUTION OF BIOGENIC MATTER IN SEDIMENTS AT STATION OF CHUKCHI SEA AREA

对2003年7月—9月第二次北极科学考察期间在楚科奇海及其邻近海域所采集四个站位的沉积物柱状样的生源物质含量进行分析,并对沉积物TC、TOC、TN和TP的空间分布和垂直剖面分布进行讨论。四个站位的TC含量为0.89%—2.17%,TN含量为0.24—1.66mg/g,TP含量为0.15—0.96mg/g,其中C21、S11和M07的总碳中均以有机碳为主,分析结果证实了楚科奇海区是一个高效的有机碳“汇”区的结论。四个站位的有机质主要来源于海洋,其中P24站和M07站的TN随着TOC增加而增加,两者呈极显著的正相关关系,说明这两个站位所在区域的沉积物中氮和有机碳之间的关系密切,氮主要以有机氮形式存在。

Sediment samples collected at Chukchi Sea and nearby area during CHINARE were analyzed and discussed to search the spafio-temporal and vertical rule of TC,TOC,TP and TN. Contents of TC in sediments range from 0. 89% to 2. 17%, contents of TN range from 0.24 mg/g to 1.66mg/g and contents of TP range from 0.15 mg/g to 0.96mg/g. Total carbon of Station C2-1 ,Sll and M07 is mainly composed of organic carbon, and this result confirms the conclusion that Chukchi Sea area is an efficient carbon accumulation area. The organic carbon of four stations mainly comes from the ocean. There is an obvious positive correlation between TOC and TN at Station P24 and M07, which could indicate the consanguineous relationshi between nitrogen and organic carbon and the existent form of nitrogen is organic nitrogen at Station PPA and M07.