白令海及西北冰洋典型持久性有机污染物的生物泵输出

以中国北极科学考察（2008-2018）为研究平台，系统获取白令海及西北冰洋上层水体中溶解态及颗粒态典型POPs（OCPs和PAHs等）的空间分布、相态分配及年际变化特征，利用Po-210/Pb-210、Th-234/U-238不平衡方法等天然放射性同位素示踪技术，全面估算并绘制北冰洋-太平洋扇区上层水体中典型POPs物质的生物泵输出通量及其变化图景，探讨水体相关碳参数（POC、DOC、BC）与理化参数变化对其输出过程的影响，进而评估在北极快速变化背景下海洋生物泵在北极POPs传输与循环过程中的相对重要性。

Based on the platform of Chinese Arctic Research Expedition (CHINARE 2008-2018), we systematically study the spatial distribution, the phase partition and the inter-annual variation of typical persistent organic pollutants (POPs) (OCPs and PAHs etc.) in the upper water of the Bering Sea and the western Artic Ocean. This study uses Po-210/Pb-210 and Th-234/U-238 disequilibria method to estimate the output fluxes of the selected POPs in the upper layer of the Pacific Sector of Arctic Ocean, which is generated by the biological pump processes, and to map its change scenarios. In order to investigate and discuss the impact of relevant factors on the output process, relevant carbon factors (e.g. POC, BC and DOC) and physical and chemical parameters were given simultaneously. Thus the relative importance of ocean biological pump to POPs transport and cycling in the Arctic Ocean under the current background of rapid change was estimated.