Variability of the oceanic warm water route during marine isotope stage 3 - Investigations with a comprehensive coupled climate model

海洋同位素阶段 3 期间海洋暖水路线的变化 - 使用综合耦合气候模型进行调查

• 批准号: 21541002
• 负责人: Professor Dr. Michael Schulz
• 金额: --
• 依托单位: Fachgebiet Geosystem-Modellierung
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2006
• 资助国家: 德国
• 起止时间: 2005-12-31 至 2009-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/21541002?language=en
• 关键词: Variability; oceanic; warm; water; route

Paleoceanographic evidence suggests that the ocean s thermohaline circulation played a crucial role in triggering - or at least amplifying - millennia!-scale climate variability during Marine-Isotope Stage 3 (MIS3). The role of the conveyor s warm water route during this glacial interval is enigmatic. The Indonesian Throughflow (ITF) and Agulhas leakage may be considered key components for the warm water route. Disturbances of these bottlenecks may affect the climate system in several ways, influencing large-scale oceanic heat transports as well as monsoon and ENSO (El Nido/Southern Oscillation) dynamics. Using a new comprehensive global climate model, we will assess the effects of cold stadial/ warm interstadial successions on the climate of MIS3 with a particular eye towards the variability of the warm water path. We will analyze teleconnections between the ITF, Agulhas leakage and North Atlantic deep-water formation, the position of subtropical fronts, salinity balances of ocean basins as well as atmospheric and oceanic heat transports. Moreover, monsoon and ENSO dynamics as well as the Indian Dipole Mode will be examined for MISS stadial and interstadial climate states. The project will benefit from a close cooperation with marine geologists from Kiel-based working groups who will provide data-based estimates of the ITF on centennial timescale for MIS3.

古海洋学证据表明，海洋的温盐环流在触发-或至少放大-千年中发挥了至关重要的作用！海洋同位素第三阶段（MIS 3）的气候变化。在这个冰川期，传送带的温水路线的作用是神秘的。印度尼西亚通流（ITF）和阿古拉斯泄漏可能被认为是温水路线的关键组成部分。这些瓶颈的扰动可能会以几种方式影响气候系统，影响大规模海洋热量输送以及季风和ENSO（埃尔尼多/南方涛动）动态。利用一个新的综合性全球气候模式，我们将评估冷stadial/温暖stadial的继承对MIS 3气候的影响，特别是着眼于暖水路径的变化，我们将分析ITF，Agulhas泄漏和北大西洋深水形成，副热带锋的位置，海洋盆地的盐度平衡以及大气和海洋热量输送之间的遥相关。此外，季风和ENSO动力学以及印度偶极子模式将被检查的MISS stadial和interstadial气候状态。该项目将受益于与来自基尔工作组的海洋地质学家的密切合作，这些工作组将为MIS 3提供基于数据的ITF百年时标估计。