This paper focuses on the background of rapid change in the west Arctic,investigates the marine ecological environmental responses to the Arctic rapid change on the aspects of the variation of nutrients,chlorophyll, phytoplankton community and sedimentary carbon buried in the western Arctic Ocean.Due to its special geographical location,the Arctic Ocean has become the most sensitive area for the regional response of climate change.In the last two decades,as the consequences of Arctic sea water temperature rises,rapid sea ice melting,light limitation disappearing,the upper layer of nutrients are fully utilized,chlorophyll increasing and chlorophyll maximum layer moves down and expands to the north,and the marine biological pump is running more efficiently.In addition to the ice algae,which once played an important role in the Arctic ecosystem,organic carbon from photosynthesis such as diatom has aslo gradually increased in the water column and buried in sediments.The increase in primary productivity in the western Arctic not only increases carbon sink in the sediment,but also provides more food sources for marine ecosystems.