中文摘要：

与北极海洋和邻近的海的表面上的壮丽的冰盖子，北极区域对极其敏感而且在气候上有强壮的扩大效果不仅变化。观察在过去的十年期间记录了实质的撤退并且北极海冰盖子变瘦，正在加速的一个过程。它全球气候上的反馈和影响成为了当前的气候变化研究的一个重要题目。planktonic 有孔虫目动物的方解石测试是在远洋的沉积的主要成分，并且他们为过去海洋学的条件的重建提供珍贵材料。然而，因为材料的有限可获得性，研究在北极海区域仍然是稀少的。这里，我们在场从浮游生物的现代有孔虫目动物的研究拖引在中国的第四北极远征期间在北极海洋的 Makarov 盆拿的样品。我们分析了在现代 planktonic 有孔虫目动物并且在他们的稳定的同位素信号存储的生态的信息，并且建立了在主要 taxa 和环境的分发之间的一种关系。我们的主要观察如下：(1 ) 在 Makarov 盆，极的种类 Neogloboquadrina pachyderma (左首的卷) 统治 > 150 m planktonic 有孔虫目的集合。(2 ) planktonic 有孔虫目动物在 100200 m 的深度间隔在 50100 m 和更少的水深度主要住在上面的 halocline。(3 ) 在 halocline 的温度变化能在水列影响绝对许多 planktonic 有孔虫目动物和他们的分发。更温暖的 halocline 对 planktonic 有孔虫目动物的发展更有利。(4 ) N 的更轻的 18O 价值(2.11 ) 。pachyderma (罪恶) 在 100200 m 的深度间隔被记录，它与在海冰结冰期间外面分开的同位素地轻的盐水有关是可能的。相对重的 18O 价值(1.68 2.68，一般水准 2.27 ) 在 50100 的深度间隔， m 可以被低咸度水影响，相对重的 18O 价值在融化在表面层的海冰期间形成了。

英文摘要：

The Arctic region, with magnificent ice cover on the surface of the Arctic Ocean and adjacent seas, is not only extremely sensitive to but also has strong amplifica- tion effects on climate change. Observations during the past decades have documented substantial retreat and thinning of the Arctic sea-ice cover, a process that is accelerating. Its feedback and impact on the global climate has become an important subject of current climate change research. Calcite tests of planktonic foraminifers are major constituents in pelagic sediments, and they provide valu- able materials for the reconstruction of past oceanographic conditions. However, research is still sparse in the Arctic sea area because of limited availability of the materials for investigation. Here, we present a study of modem fora- minifers from the plankton tow samples taken in the Makarov Basin of the Arctic Ocean during the fourth Arctic expedition of China. We have analyzed ecological information stored in the modem planktonic foraminifers and in their stable isotope signals, and established a rela- tionship between the distribution of the main taxa and theenvironment. Our main observations are as follows： （1） in the Makarov Basin, the polar species Neogloboquadrina pachyderma （sinistral coiling） dominates the 〉150 μm planktonic foraminiferal assemblages. （2） The planktonic foraminifers live mainly in the upper halocline at a water depth of 50-100 m and less in the depth interval of 100-200 m. （3） Temperature change in the halocline can affect the absolute abundance of planktonic foraminifers and their distribution in the water column. The warmer halocline is more favorable to the development of plank- tonic foraminifers. （4） A lighter 6180 value （2.11‰） of N. pachyderma （sin.） is recorded in the depth interval of 100-200 m, which is likely related to the isotopically light brines separated out during sea ice freezing. The relatively heavy δ18O value （1.68 ‰-2.68‰, average 2.27‰） in the depth interval