The Biological Carbon Pump in the Subtropical North Pacific Ocean: Mechanisms of Nutrient Supply

副热带环流占据了世界海洋的很大一部分，直到最近，人们普遍认为这些广阔的营养物枯竭地区只支持少量的初级生产力。然而，这种观点正在改变，这些地区的生产似乎很重要。因此，了解向这些地区提供营养物质的机制是很重要的。为此，本项目将寻求改进对营养物向光带运输的机制的估计，并更好地限制碳泵的大小。该提案的三个主要内容是改进HOT系泊上的氧气和N2的连续测量，机会船的DOP（溶解有机磷）和DON（溶解有机氮）的测量，以及氖的测量，以阐明气泡诱导的O2预算中气体交换的机制。目的是确定磷的间歇期和地表运输的定量重要性，并改进净生物产氧量的质量平衡估计。

ABSTRACTOCE-9906922The subtropical gyres occupy a large fraction of the world ocean and until recently, the common view was that these vast nutrient-depleted regions support only a small amount of primary productivity. However, this view is changing and it appears that production in these areas is important. Thus it is important to understand the mechanism by which nutrients are supplied to these areas. To this end, this project will seek to improve estimates of the mechanisms of nutrient transport to the euphotic zone, and also better constrain the magnitude of the carbon pump. The three main elements of this proposal are improvment in the continuous measurements of oxygen and N2 on the HOT mooring, ship-of-opportunity measurements of DOP (dissolved organic phosphorus) and DON (dissolved organic nitrogen), and measurements of neon to clarify the mechanism of bubble-induced gas exchange in the O2 budget. The goal is to determine the quantitative importance of intermittment diapycnal and surface transport of phosphorus, and to improve mass balance estimates of net biological oxygen production.