What Are the Sources and Significance of Dissolved Organic Carbon and Nutrient Signals Within the Arctic Basin?

拟议的研究将调查北冰洋溶解营养物和有机物的来源、转化和归宿的各个方面。 1997年至1999年期间，美国海军潜艇在北冰洋巡航期间将收集海水样本（共约1,200个），用于分析营养物质（NH 4、NO3、NO2）。PO 4、SiO 4）和总有机碳（TOC）、氮（TON）和磷（TOP）。 还将测量溶解在海水中的木质素衍生酚的浓度，以估计北极盆地陆地衍生有机碳对TOC的贡献。 将对营养物和有机物的浓度和分布进行评估，以确定：1）如果白令海峡/楚科奇海是北极盆地碳和营养物的重要来源，2）北极河流是否是盆地碳预算的重要有机物来源，3）如果北极的有机物是大气二氧化碳的汇，4）北冰洋内的生物过程是否是TOC浓度升高的原因。

The proposed studies would investigate various aspects of the sources, transformations, and fates of dissolved nutrients and organic matter in the Arctic Ocean. Seawater samples (~1,200 total) would be collected during U.S. Navy submarine cruises in the Arctic Ocean during 1997-1999 for the analysis of nutrients (NH4, NO3, NO2. PO4, SiO4) and total organic carbon (TOC), nitrogen (TON) and phosphorous (TOP). The concentrations of lignin-derived phenols dissolved in seawater would also be measured to provide an estimate of the contribution of terrestrially-derived organic carbon to TOC in Arctic Basins. The concentrations and distributions of nutrients and organic matter will be evaluated to determine: 1) if the Bering Strait/Chukchi Sea is a significant source of carbon and nutrients to the Arctic basins, 2) whether Arctic rivers are significant sources of organic matter to basin carbon budgets, 3) if organic matter in the Arctic is a sink for atmospheric carbon dioxide, 4) if biological processes within the Arctic Ocean are responsible for elevated concentrations of TOC.