POC Production and Export in the Indian Ocean Sector of the Southern Ocean: A US-China Collaborative Research Program

本文研究的是极地锋区中深水团通气对生物物质产生和输出通量的影响。这是缅因大学和中国南极科考队（CHINARE）的合作项目。船上的工作是为中国南极补给船在印度洋地区的普里兹湾。在南部春季，该地区经历了浮游植物的大量繁殖，这被认为是中深水团通过通风输送营养物质的结果。在每年的基础上，人们相信这样的水华是颗粒有机碳和生物硅流到海底的主要来源。然而，目前没有关于通过水柱下沉的颗粒物有机物质数量的数据，使得该地区生产和出口之间的数量关系在很大程度上不确定。工作的初始阶段包括在南纬64度和东经73度左右设置一个时间序列沉积物捕集器系泊，以利用中国海洋资源研究中心过去十年在该地区获得的历史数据集。将对每两周一至每月一次的捕集器样本进行有机成分分析，并结合初级生产力观察，提供可从中得出出口值的基本数据。这项工作将与中华人民共和国国家海洋局和中国南极科考队合作进行。除了在南极补给船上提供时间外，国家海洋局还将赞助船上初级生产力实验和配套的水文测量。参与合作的美国科学家将根据“全球海洋通量联合研究”制定的标准为这些观测提供指导，并为系泊沉积物捕集器提供硬件。中美两国调查人员将共同分享所有样本和数据集，并共同进行数据分析。＊＊＊

*** 9726186 Pilskaln This proposed work is a study of the biological production and export flux of biogenic matter in response to ventilation of intermediate and deep water masses within the Polar Front zone. It is a collaborative work between the University of Maine and the Chinese Antarctic Research Expedition (CHINARE). The shipboard work is proposed for the Chinese antarctic resupply vessel off Prydz Bay in the Indian Ocean sector. In the austral Spring, this region experiences phytoplankton blooms that are thought to be the result of nutrient transport by the ventilation of intermediate and deep water masses. On an annual basis, it is believed that such blooms are the primary source of particulate organic carbon and biogenic silica flux to the ocean bottom. At this time however no data exists on the amount of particulate organic matter that sinks through the water column, leaving the quantitative relationships between production and export largely undefined in this region. The initial phase of the work consists of setting out a time-series sediment trap mooring at approximately 64 deg S latitude and 73 deg E longitude to take advantage of the historical data set that CHINARE has obtained in this area over the past decade. The biweekly to monthly trap samples will be analyzed for their organic constituents, and in conjunction with primary productivity observations will provide the basic data from which export values can be derived. This work will be carried out in collaboration with the State Oceanic Administration of the People's Republic of China, and the Chinese Antarctic Research Expedition. In addition to providing time on the antarctic resupply vessel, the SOA will sponsor the shipboard primary productivity experiments and the supporting hydrographic measurements. The collaborating American scientists will provide guidance in making these observations to standards developed for the Joint Global Ocean Flux Study, and provide the hardware for the moored sediment trap. There will be a mutual sharing between the U.S. and Chinese investigators of all samples and data sets, and the data analysis will be carried out jointly. ***