Suborbital climate variability in the Southern Ocean (SUBCLIMATE): Comparision and potential forcing using high-resolution sediment physical, geochemical, and micropaleotological

南大洋亚轨道气候变率（SUBCLIMATE）：利用高分辨率沉积物物理、地球化学和微古生物学进行比较和潜在强迫

• 批准号: 29589599
• 负责人: Dr. Gerhard Kuhn
• 金额: --
• 依托单位: Alfred-Wegener-Institut (AWI) Helmholtz-Zentrum für Polar- und Meeresforschung
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2007
• 资助国家: 德国
• 起止时间: 2006-12-31 至 2013-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/29589599?language=en
• 关键词: Suborbital; climate; variability; Southern; Ocean

The project SUBCLIMATE intends to study suborbital climate cycles of the Weddell Sea and the Scotia Sea as part of the Southern Ocean Initiative of the International Marine Past Global Change Study (IMAGES) program. Scientific goals of our study are (i) a high-resolution insight into ice-sheet dynamics. Through a combination of bottom water and surface water climate signals, we will investigate internal and external forcing factors that influence, for instance, (ii) Antarctic Bottom Water production and the associated development of the Southern Ocean and the global thermohaline circulation. In addition, our aim is to data the retreat of the Antarctic ice masses (iii) at the end of the last glacial, and to conduct (iiii) a bi-polar comparison of suborbital climate change. To achieve this goal, we will create ultrahigh-resolution paleoclimate proxy records through a combination of traditional analytical means (e.g., ¿18O, ¿13C, ICP/MS, , diatoms, carbonate, Corg) and state-of-the-art core logging techniques (Multi-Sensor Core Logger, Geoscan color logger, XRF-scanner). Those proxy records will be dated by AMS14C, ¿18O, and geomagnetic paleointensity, and investigated, together with globally distributed records of suborbital climate variability, for spectral and cross-spectral behavior, to provide clues about underlying mechanisms and forcing factors of suborbital climate change.

SUBCLIMATE项目旨在研究威德尔海和斯科舍海的亚轨道气候周期，作为国际海洋过去全球变化研究（IMAGES）计划的南大洋倡议的一部分。我们研究的科学目标是：(1)对冰盖动力学的高分辨率洞察。通过结合底层水和地表水气候信号，我们将调查影响以下方面的内部和外部强迫因素：例如，（二）南极底层水的产生以及南大洋和全球温盐环流的相关发展。此外，我们的目标是获得末次冰期结束时南极冰盖（iii）退缩的数据，并进行（iii）亚轨道气候变化的双极比较。为了实现这一目标，我们将通过结合传统的分析手段（例如：¿18O、¿13C、ICP/MS、硅藻、碳酸盐、Corg）和最先进的岩心测井技术（多传感器岩心记录仪、Geoscan彩色记录仪、xrf扫描仪）来创建超高分辨率的古气候代理记录。这些代用记录将通过AMS14C、¿18O和地磁古强度进行定年，并与全球分布的亚轨道气候变率记录一起进行光谱和交叉光谱行为的研究，以提供亚轨道气候变化的潜在机制和强迫因子的线索。