Reconstruction of the Atlantic paleocirculation back to the Last Interglacial by a combined proxy approach from ODP Leg 172 Site 1063 sediments.

通过 ODP Leg 172 Site 1063 沉积物的组合代理方法重建大西洋古循环至末次间冰期。

• 批准号: 180267307
• 负责人: Professor Dr. Augusto Mangini
• 金额: --
• 依托单位: Institut für Umweltphysik
• 依托单位国家: 德国
• 项目类别: Infrastructure Priority Programmes
• 财政年份: 2010
• 资助国家: 德国
• 起止时间: 2009-12-31 至 2014-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/180267307?language=en
• 关键词: Reconstruction; Atlantic; paleocirculation; back; Last

The Atlantic Meridional Overturning Circulation holds a key role in the climatic system of our planet, due to the transport of global heat and carbon. It is crucial to reconstruct the past distribution of water masses in order to estimate or model the future evolution. 231Pa/230Th and εNd from deep sea sediments are promising proxies to derive the past paleoceanography, however, both are subject to specific limitations. In preceding projects the high accumulating sediment core ODP Leg 172 Site 1063 has been proved as an appropriate location for the application of both proxies. Therefore, by a combination of 231Pa/230Th and εNd the past strength of ocean circulation will be examined in high temporal resolution back to the last Interglacial (Eemian). It is assumed, that temperatures during the Eemian were partly higher than during the Holocene. Thus, in regard to a recent global warming, the reconstruction of the past Ocean circulation may serve to anticipate future developments.

大西洋经向翻转环流在我们星球的气候系统中起着关键作用，因为它输送了全球的热量和碳。为了估计或模拟未来的演变，重建过去水团的分布是至关重要的。深海沉积物中的231Pa/230Th和ε Nd是研究古海洋学的有用指标，但都有其局限性。在之前的项目中，ODP 172航次1063站点的高积累沉积物岩心已被证明是应用这两种替代物的合适位置。因此，结合231Pa/230Th和ε Nd，可以在高时间分辨率下研究末次间冰期（Eemian）以前的海洋环流强度。据推测，Eemian期间的温度部分高于全新世。因此，对于最近的全球变暖，过去的海洋环流的重建可能有助于预测未来的发展。

项目成果

Rekonstruktion der Atlantischen Zirkulation innerhalb des letzten Glazialen Zyklus

末次冰期期间大西洋环流的重建

• DOI: 10.11588/heidok.00016524
• 发表时间: 2014

Strong and deep Atlantic meridional overturning circulation during the last glacial cycle

• DOI: 10.1038/nature14059
• 发表时间: 2015-01-01
• 期刊: NATURE
• 影响因子: 64.8
• 作者: Boehm, E.;Lippold, J.;Deininger, M.
• 通讯作者: Deininger, M.