A Role for the North Pacific Ocean in Deglacial Atmopsheric CO2 Rise?

北太平洋在冰消期大气二氧化碳上升中的作用？

基本信息

批准号：
NE/I013377/1
负责人：
Amelia Shevenell
金额：
$ 49.13万
依托单位：
University College London
依托单位国家：
英国
项目类别：
Research Grant
财政年份：
2011
资助国家：
英国
起止时间：
2011 至无数据
项目状态：
已结题

来源：
https://gtr.ukri.org/projects?ref=NE%2FI013377%2F1
关键词：
Role North Pacific Ocean Deglacial

项目摘要

At present the North Pacific Ocean is a source of atmospheric CO2, despite the ocean being a net sink of anthropogenic CO2 emissions. It is essential to future climate predictions to understand the North Pacific's contribution to atmospheric CO2. We propose to use the last glacial-interglacial transition as means of assessing the effects of changing ocean circulation, nutrient availability/utilization, and marine biologic productivity on atmospheric CO2. This research will provide insight and the role of the N Pacific in the glacial storage and interglacial release of carbon to the atmosphere. Our scientific aims will be achieved through a mutiproxy depth transect approach using five existing marine sediment cores from the NE Pacific continental margin within the subpolar-subtropical transition zone, which will integrate new and established geochemical techniques and allow us to determine: 1) the ventilation history of the NE Pacific water column over the last deglaciation., and 2) the role of nutrients in the glacial-interglacial productivity signal. This integrative approach ensures a more complete understanding of global biogeochemical cycling over the last deglaciation than is possible using a more traditional single site or single proxy approach. The outcomes of this research will illuminate the role of the North Pacific in regulating atmospheric CO2 during major climate transitions.

目前，北太平洋是大气二氧化碳的来源，尽管海洋是人为二氧化碳排放的净水槽。了解未来的气候预测至关重要，以了解北太平洋对大气二氧化碳的贡献。我们建议将最后的冰川间 - 冰河过渡作为评估改变海洋循环，养分可用性/利用率以及海洋生物学生产力对大气CO2的影响的手段。这项研究将提供洞察力以及N太平洋在碳间释放和冰川间释放到大气中的作用。我们的科学目的将通过使用浓度的深度横切方法来实现，使用五个现有的海洋沉积物核心，来自NE Pacific Contental Earmin in the Suplolar-Troubtropapical Trustrition Tore区域内的NE Pacific Continental边缘，这将整合新的地球化学技术，并允许我们确定：1）在最后的Pacification Point of the Nut nutial of the Glalacial and gllacial and 2）和2）和2）and and 2）and and 2）。生产力信号。这种综合方法可确保对最后一次脱气的全球生物地球化学循环的更全面了解，而不是使用传统的单个站点或单个代理方法的可能性。这项研究的结果将阐明北太平洋在主要气候过渡期间调节大气二氧化碳中的作用。