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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CO2的来源，尽管海洋是人为CO2排放的净汇。了解北太平洋对大气CO2的贡献对未来的气候预测至关重要。我们建议使用末次冰期-间冰期过渡作为评估海洋环流变化、营养物质可用性/利用率和海洋生物生产力对大气CO2影响的手段。这项研究将提供洞察力和北太平洋在冰川储存和间冰期释放碳到大气中的作用。我们的科学目标将通过一个多代理深度样带方法来实现，该方法使用了来自亚极地-亚热带过渡带内东北太平洋大陆边缘的五个现有海洋沉积物岩心，这将整合新的和已建立的地球化学技术，并使我们能够确定：1）东北太平洋水柱在末次冰消期的通风历史。2）营养物质在冰川-间冰期生产力信号中的作用。这种综合的方法确保了一个更完整的了解全球地球化学循环在最后一次冰消期比可能使用一个更传统的单一网站或单一代理的方法。这项研究的结果将阐明北太平洋在重大气候转变期间调节大气CO2的作用。