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

本提案试图利用连续u形通道和离散古磁学数据，结合颜色分析和船上数据，对IODP exp. 339期间取心的第四纪等高岩剖面进行年代学和气候数据的开发。磁数据将有助于编制第四纪地磁场变化的详细区域剖面，对地质年代学和有关磁场和地球动力学性质的更大问题都有影响。试验339期间取芯的5个地点将被检查，初步数据表明，磁性能可以从孔到孔之间相互关联。第四纪记录的厚度和总体的高沉积速率使这些岩心特别适合这种详细的分析。这项研究与同位素、天文和地层分析相结合，将能够建立一个非常详细的年表，然后将其与气候模式，特别是与热盐环流有关的气候模式联系起来。这直接关系到经验339的主要目标，即发展和限制地中海含盐流出与气候变化和事件有关的模式。在现代大西洋，这种流出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.