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汇。了解北太平洋对大气二氧化碳的贡献对于未来的气候预测至关重要。我们建议利用最后一次冰期-间冰期转变作为评估海洋环流、养分可用性/利用和海洋生物生产力变化对大气二氧化碳影响的手段。这项研究将深入了解北太平洋在冰川储存和间冰期碳释放到大气中的作用。我们的科学目标将通过使用副极地-副热带过渡区内东北太平洋大陆边缘的五个现有海洋沉积岩芯的多代理深度样线方法来实现，该方法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）通风上次冰消期东北太平洋水柱的历史。2）营养物在冰期-间冰期生产力信号中的作用。与使用更传统的单站点或单一代理方法相比，这种综合方法可确保更全面地了解上次冰消期的全球生物地球化学循环。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二氧化碳的作用。