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

合作研究：解决以 IODP 339 号探险为核心的伊比利亚边缘沉积物漂移带来的百年规模的环境变化和地磁场变化

• 批准号: 1335233
• 负责人: Gary Acton
• 金额: $ 10万
• 依托单位: University of California-Davis
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-11-01 至 2014-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1335233&HistoricalAwards=false
• 关键词: Collaborative; Research; Resolving; Centennial; Scale

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.

该提案试图将连续的U通道和离散的古磁数据与颜色分析和船上数据结合使用，以在IODP EXP期间核心的第四纪分配部分开发时间顺序和气候数据。 339.磁数据将使Quomagnary地质场变异性的详细区域类型段的开发，对地球体学和有关磁场和Geodynamo性质的更大问题的影响。 Exp期间有五个站点。将检查339，并初步数据表明磁性特性可以从孔到孔相关。第四纪记录的厚度和整体高沉积速率可能使这些核心特别适合这种详细分析。这项研究结合了同位素，天文学和地层分析，可以构建一个非常详细的年表，然后可以将其与气候模型相关联，尤其是与热盐循环有关的模型。这与EXP的主要目标直接相关。 339是将盐水地中海流出与气候变化和事件相关的模型的开发和约束。在现代大西洋，这种流出的深海循环具有重要影响。对这些循环模式的理解是预测全球气候变化的重要因素。