Participation in IODP Expedition 397 (Iberian Paleoclimate)

IODP第397次考察将于今年晚些时候（2022年10月6日至12月6日）在葡萄牙附近的伊比利亚西南边缘进行，那里迅速积累的沉积物保存了过去气候变化的高保真记录。该提案要求为D. Hodell将作为联合首席科学家参加IODP 397号考察（伊比利亚古气候），并在考察后的样品暂停期间进行巡航后研究。将通过岩心扫描X射线荧光（XRF）以1 cm空间分辨率分析两个拟定地点（SHACK-04 C和-11B）所有钻孔的岩心。这是一种非破坏性的方法，半定量地估计从分裂岩心表面沉积物成分的元素比。这些数据将用于准确地进行井间对比，并构建确保完整地层剖面所需的复合拼接剖面。我们还将制作一个低分辨率的氧同位素记录，并构建和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框架。拟议的研究将进一步推进397号考察队的总体目标，即为当代和后代的古海洋学家提供以高时间分辨率重建过去500万年北大西洋气候所需的原材料。

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.