中文摘要：

依托于2003年第2次北极科学考察航次,对西北冰洋25个表层沉积物样品用高效液相色谱仪（HPLC）进行绿素（chlorin）分析。结果显示,绿素含量值为0.04~125.29μg/g,平均18.92μg/g,远高于世界其他海域。楚科奇海陆架区绿素含量高,表明整体具有高的生产力。高营养盐的阿纳德尔流和白令海陆架流的输入促进了浮游植物的生长,加大了海源有机碳在楚科奇海陆架区的沉积,也加大了沉积绿素的输入。加拿大海盆区绿素含量低,主要因为海盆区营养盐含量低,加上海冰覆盖（光限制）,藻类生产力低;另一个因素是,海盆区水深较大,绿素在沉降过程中更容易降解,不易保存在沉积物中。通过上层水柱中叶绿素积分与表层沉积绿素的对比也可以看出,陆架区的生物量普遍高于海盆区。由于时间尺度的不同,楚科奇海上层海洋叶绿素分布（代表瞬时）和表层沉积绿绿素分布（代表几年至十几年平均）存在空间差异。而总有机碳归一化处理后的绿素与有机碳的比值,则与海源有机碳的百分含量有较好的相关性。经过归一化以后的沉积绿素与有机碳比值可以为长时间尺度下北冰洋上层海洋生态环境变化提供重要的信息。

英文摘要：

25 surface sediment samples were collected during the 2nd Chinese National Arctic Research Expedition（ CHINARE） in summer,2003. Chlorin were analyzed by high-performance liquid chromatography（ HPLC）. Chlorin content ranged from 0. 04 μg / g to 125. 29μg / g,with an average of 18. 92μg / g. High chlorin value was observed at shelf area of Chukchi Sea,where marine environment were mainly controlled by nutrient rich Anadyr and Bering Sea shelf currents flowing through Bering strait,which promote the growth of phytoplankton and lead to increasing of the marine-derived organic material deposition. Chlorin content in sediment from Canada Basin were lowest because of low productivity in the water column and pigments degradation during the longer settling and sedimentation processes. The integrated Chlorophyll a in the water column showed that the higher contents was also observed at the shelf area,although there is an insignificant correlation between the chlorin and water column phytoplankton production. While,when Chorin content was normalized with organic carbon in the sediment,it came out a significant correlation between them,which means,that this index could provide important information for understanding long time scale variation of marine ecosystems in upper Arctic Ocean.