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Impact of eddy parameterisations on the simulated response of Southern Ocean air-sea CO2 fluxes to wind stress changes in IPCC-type ocean models

涡流参数化对 IPCC 型海洋模型中南大洋海气 CO2 通量对风应力变化的模拟响应的影响

基本信息

批准号：
166390958
负责人：
Professor Dr. Andreas Oschlies, since 11/2013
金额：
--
依托单位：
Institut für Meereskunde (IMee)
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2010
资助国家：
德国
起止时间：
2009-12-31 至 2013-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/166390958?language=en
关键词：
Impact eddy parameterisations simulated response

项目摘要

The main aim of the proposed research is a systematic assessment of recently developed new parameterisations for meso-scale eddies in coarse-resolution ocean-climate models with embedded marine biogeochemistry. The focus is on the simulated relation between Southern Ocean winds and air-sea carbon fluxes as a function of the underlying eddy parameterisation. There is strong evidence that, to date, coupled climate biogeochemical models overestimate the upwelling associated with strengthening winds in the Southern Ocean because of a deficient parameterisation of the unresolved mesoscale activity. This, in turn, implies that state-of-the-art (model based) projections of oceanic uptake of anthropogenic carbon are significantly flawed as the projected increase in upwelling brings too much deep water with high dissolved inorganic carbon concentrations to the surface where it is subject to air-sea exchange. On the other hand, recent advances in the parameterisation of meso-scale eddies in the ocean have not been transferred yet to coupled ocean biogeochemical models. Here, we propose to implement the recently developed new eddy parameterisations into a global coupled ocean biogeochemical model. In a suite of model experiments we strife to explore the uncertainty of model projections of air-sea carbon fluxes in the Southern Ocean associated with the underlying meso-scale eddy parameterisations.

拟议的研究的主要目的是系统地评估最近开发的新参数化的中尺度涡旋的粗分辨率海洋气候模型与嵌入式海洋地球化学。重点是模拟南大洋风和海气碳通量之间的关系作为底层涡参数化的函数。有强有力的证据表明，到目前为止，耦合气候地球化学模型高估了上升流与加强风在南大洋，因为一个未解决的中尺度活动的参数化不足。这反过来又意味着，最先进的（基于模型的）海洋吸收人为碳的预测存在重大缺陷，因为上升流的预测增加将过多的具有高溶解无机碳浓度的深水带到表面，在那里进行海气交换。另一方面，在海洋中尺度涡旋参数化的最新进展尚未转移到耦合海洋地球化学模式。在这里，我们建议实施最近开发的新的涡参数化到全球耦合海洋地球化学模式。在一套模型实验中，我们努力探索南大洋海气碳通量模型预测的不确定性与底层中尺度涡参数化。