Holocene Variations in Upper North Atlantic Deep Water(Labrador Sea Water) Properties

总结：该项目将重建全新世千年尺度的变化，在上NADW属性的三个核心劳伦特斜坡，形成一个横断面之间的1035和1854米的水深。 将对底栖有孔虫进行氧同位素、Mg/Ca、Cd/Ca和Zn/Ca测量，以确定深水特性，包括温度和盐度估计值。 年表将受AMS 14 C日期的限制。 初步数据表明，岩芯的累积速率为20- 50厘米/千年。 取样间隔将为40-60年。 南极有孔虫G.在拉布拉多海口附近的一个岩芯的全新世部分的bulloides，涉及到深水的变化，地表水的变化。

Summary: The project will reconstruct Holocene millennial-scale changes in upper NADW properties in three cores on the Laurentian Slope that form a transect between 1035 and 1854m water depth. Oxygen isotope, Mg/Ca, Cd/Ca and Zn/Ca measurements will be done on benthic foraminifers to characterize deep water properties including temperature and salinity estimates. Chronology will be constrained by AMS 14C dates. Preliminary data indicate the cores have accumulation rates of 20-50cm/kyr. Sampling intervals will range from 40-60 years. Oxygen isotope and Mg/Ca measurements of the planktic foraminifer G. bulloides in the Holocene section of a core near the mouth of the Labrador sea to relate the deep water changes to surface water changes.