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项目侧重于始新世气候的表面特征，特别强调海洋表面温度，大气二氧化碳水平，并模拟始新世早期气候最佳（EECO）的气候。由于所用模型的复杂性和分辨率，UKESM禁止进行长时间的模拟，深海在很大程度上被忽略。在这个联合助学金，我们探讨深海环流在EECO使用组合模型数据的方法。学生将使用钕同位素代用品在EECO（52-50 Ma）的全球范围内重建深海指纹。随后将使用HadCM 3L模式对重建的深海环流一阶图进行敏感性研究。该模型的分辨率低于更复杂的UKESM，但仍高于以前的研究。学生将完全融入SWEET，并将受益于DeepMIP社区的国际合作。与主要项目的UKESM建模结果进行比较也将为SWEET带来附加值，特别是对1000年后UKESM模型中海洋状态的相对平衡进行评估。

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

• DOI: 10.1029/2021pa004329
• 发表时间: 2022
• 期刊: Paleoceanography and Paleoclimatology
• 影响因子: 3.5
• 作者: Zhang, Yurui;Boer, Agatha M.;Lunt, Daniel J.;Hutchinson, David K.;Ross, Phoebe;Flierdt, Tina;Sexton, Philip;Coxall, Helen K.;Steinig, Sebastian;Ladant, Jean‐Baptiste
• 通讯作者: Ladant, Jean‐Baptiste