Participation in IODP Expedition 397 (Iberian Paleoclimate)

参加IODP第397次探险（伊比利亚古气候）

• 批准号: NE/X002101/1
• 负责人: David Hodell
• 金额: $ 10.44万
• 依托单位: University of Cambridge
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2022
• 资助国家: 英国
• 起止时间: 2022 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=NE%2FX002101%2F1
• 关键词: Participation; IODP; Expedition; 397; Iberian

IODP Expedition 397 will take place on the SW Iberian margin off Portugal later this year (06 Oct - 06 Dec 2022) where rapidly accumulating sediments preserve a high-fidelity record of past climate change. This proposal requests funding (travel and salary) for Prof. D. Hodell to participate in IODP Expedition 397 (Iberian Paleoclimate) as co-chief scientist and for postcruise research during the sample moratorium period following the expedition. Cores from all holes at two of the proposed sites (SHACK-04C and -11B) will be analyzed by core scanning X-ray fluorescence (XRF) at 1 cm spatial resolution. This is a non-destructive method that semi-quantitatively estimates elemental ratios of sediment composition from the split core surface. These data will be used to accurately correlate from hole-to-hole and construct a composite spliced section that is needed to ensure a complete stratigraphic section. We will also produce a low-resolution oxygen isotope record and construct and orbitally-tuned age model so scientists working on these sites can place their data into a robust stratigraphic and chronologic framework. The proposed research will further the overall objective of Expedition 397 which is to provide present and future generations of paleoceanographers with the raw material needed to reconstruct the North Atlantic climate at high temporal resolution for the last 5 million years.

今年晚些时候（2022年10月6日至12月6日），IODP 397探险队将在葡萄牙西南部伊比利亚边缘进行考察，那里快速积累的沉积物保存了过去气候变化的高保真记录。本提案要求资助D. Hodell教授作为联合首席科学家参加IODP远征397（伊比利亚古气候），并在远征后的样品暂停期间进行巡航后研究。在两个提议的地点（SHACK-04C和-11B）的所有孔的岩心将通过岩心扫描x射线荧光（XRF）以1厘米的空间分辨率进行分析。这是一种非破坏性的方法，可以半定量地估计从裂心表面沉积物组成的元素比例。这些数据将用于精确地关联井眼与井眼，并构建复合拼接剖面，以确保完整的地层剖面。我们还将制作一个低分辨率的氧同位素记录，并构建一个轨道调整的年龄模型，以便在这些地点工作的科学家可以将他们的数据放入一个强大的地层和年代学框架中。拟议的研究将进一步推动397考察队的总体目标，即为现在和未来的古海洋学家提供所需的原材料，以高时间分辨率重建过去500万年的北大西洋气候。

项目成果

Expedition 397 Preliminary Report: Iberian Margin Paleoclimate

• DOI: 10.14379/iodp.pr.397.2023
• 发表时间: 2023-02
• 期刊: International Ocean Discovery Program Preliminary Report
• 作者: D. Hodell;F. Abrantes;C.A. Alvarez Zarikian

A 1.5-Million-Year Record of Orbital and Millennial Climate Variability in the North Atlantic

北大西洋 150 万年的轨道和千年气候变化记录

• DOI: 10.5194/cp-2022-61
• 发表时间: 2022
• 作者: Hodell D