DOC-SWEET: Deep Ocean Circulation during Super Warm Early Eocene Temperatures and climate: understanding the response of the Earth to high CO2 throug

DOC-SWEET：始新世早期超温暖温度和气候期间的深海环流：通过了解地球对高二氧化碳的反应

• 批准号: 2498851
• 金额: --
• 依托单位: Imperial College London
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2019
• 资助国家: 英国
• 起止时间: 2019 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2498851
• 关键词: DOC; SWEET; Deep; Ocean; Circulation

The SWEET project focusses on the surface characteristics of the Eocene climate, with particular emphasis on sea surface temperature, atmospheric carbon dioxide levels, and modelling the climate of the Early Eocene Climatic Optimum (EECO). Due to the complexity and resolution of the model used, UKESM, very long simulations are prohibited and the deep ocean is largely ignored. In this Associated Studentship we explore deep ocean circulation during the EECO using a combined model-data approach. The student will use the neodymium isotope proxy to reconstruct deep ocean fingerprints across a range of global locations for the EECO (52-50 Ma). The reconstructed first order picture of deep ocean circulation will subsequently be subjected to sensitivity studies using the HadCM3L model. This model has a lower resolution than the more complex UKESM, but still a higher resolution than previous studies.The student will be fully integrated into SWEET, and will benefit from international collaborations across the DeepMIP community. Comparison with the UKESM modelling results from the main project will also bring added value to SWEET, in particular an assessment of the relative equilibrium of the ocean state in the UKESM model after 1000 years.

SWEET 项目重点研究始新世气候的表面特征，特别强调海面温度、大气二氧化碳水平，并对始新世早期气候最佳 (EECO) 的气候进行建模。由于 UKESM 所使用模型的复杂性和分辨率，禁止进行很长的模拟，并且很大程度上忽略了深海。在这个联合学生项目中，我们使用模型数据相结合的方法探索 EECO 期间的深海环流。学生将使用钕同位素代理来重建 EECO（52-50 Ma）全球范围内的深海指纹。重建的深海环流一阶图随后将使用 HadCM3L 模型进行敏感性研究。该模型的分辨率比更复杂的 UKESM 低，但仍然比以前的研究分辨率更高。学生将完全融入 SWEET，并将受益于 DeepMIP 社区的国际合作。与主项目的 UKESM 建模结果进行比较也将为 SWEET 带来附加值，特别是对 UKESM 模型中 1000 年后海洋状态相对平衡的评估。

项目成果

Early Eocene Ocean Meridional Overturning Circulation: The Roles of Atmospheric Forcing and Strait Geometry

早始新世海洋经向翻转环流：大气强迫和海峡几何的作用

• 发表时间: 2022
• 期刊: Paleoceanography and Paleoclimatology
• 影响因子: 3.5
• 作者: Zhang Y