Collaborative Research: Resolving Centennial-Scale Environmental Change and Geomagnetic Field Variability From Iberian Margin Sediment Drifts Cored on IODP Expedition 339

这项建议寻求利用连续的U沟和离散的古地磁数据，结合颜色分析和船上数据，开发IODP Exp期间取心的第四纪等深线剖面的年代学和气候数据。339.磁性数据将有助于编制第四纪地磁场变异性的详细区域类型剖面，涉及地质年代学和有关磁场和地球发电机性质的更大问题。在试验期间取了五个地点的芯。339将被检查，初步数据表明，磁性可以从一个洞到另一个洞关联。第四纪记录的厚度和总体较高的沉积速率可能使这些岩心特别适合进行这种类型的详细分析。这项研究与同位素、天文和地层分析相结合，将能够建立异常详细的年代学，然后可以与气候模型联系起来，特别是那些与温盐环流有关的模型。这与EXP的主要目标直接相关。339这是关于地中海咸水外流与气候变化和事件之间关系的模型的发展和制约。在现代大西洋中，这种外流对深海水的循环有重要影响。对这些环流模式的了解是预测全球气候变化的一个重要因素。

This proposal seeks to use continuous u-channel and discrete paleomagnetic data in combination with color analysis and shipboard data to develop chronological and climate data on the Quaternary contourite section cored during IODP exp. 339.The magnetic data will enable development of a detailed regional type section of Quaternary geomagnetic field variability with implications for both geochronology and larger questions concerning the nature of the magnetic field and geodynamo. Five sites cored during exp. 339 will be examined and preliminary data suggests that magnetic properties can be correlated from hole-to-hole. The thickness of the Quaternary record and overall high sedimentation rates could make these cores particularly amenable to this type of detailed analysis. This study, in combination with isotopic, astronomic, and stratigraphic analysis will enable construction of an exceptionally detailed chronology which can then be tied to climate models, especially those related to thermohaline circulation. This is directly related to the primary objective of exp. 339 which is the development and constraint of models relating saline Mediterranean outflow to climate variations and events. In the modern Atlantic, this outflow has important effects of the circulation of deep ocean water. The understanding of these circulation patterns is one important element of predicting global climate variations.