A Mechanistic Study of Bio-Physical Interaction and Air-Sea Carbon Transfer in the Southern Ocean

南大洋生物物理相互作用和气海碳转移的机制研究

• 批准号: 1744755
• 负责人: Takamitsu Ito
• 金额: $ 30.84万
• 依托单位: Georgia Tech Research Corporation
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2018
• 资助国家: 美国
• 起止时间: 2018-05-01 至 2022-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1744755&HistoricalAwards=false
• 关键词: Mechanistic; Study; Bio; Physical; Interaction

The Southern Ocean serves as the planet's major uptake region for the oceanic uptake of increasing levels of atmospheric carbon dioxide (CO2). The current generation of coupled climate models (atmosphere-ocean-land) are used to make future climate projections, but are known to exhibit significant biases in observed ocean carbon uptake. These numerical models are known to lack the resolution (space and time) to adequately represent many of the mesoscale processes and features known to effect important roles in air-sea exchange. To account for the ocean mesoscale (10km - 100km) phenomena, such as jets, fronts, meanders and eddies known to be crucial for bio-physical interactions of CO2 fluxes, this project will progressively increase model resolution from coarse to finer grid spacing, furthering our understanding of mesoscale processes.The study will focus on regions of interest, the austral South Pacific, and the Drake Passage. Both regions are to some extent well observed. These two regions are topographically constrained pathways constituent pathways of the Atlantic Circumpolar Current, and exhibit enhanced eddy activity. The numerical output will be compared with observations and a suite of bio-geochemical tracers will be used to examine biophysical interaction processes, occurring at fronts and eddies.The results from the study can provide process and specific metrics and diagnostics to assess and calibrate the global climate carbon models. A Ph.D. and an undergraduate intern will be trained and gain research insight.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

南部海洋是地球上大气二氧化碳（CO2）的海洋吸收的主要吸收区域。当前一代的耦合气候模型（大气 - 海界）用于进行未来的气候投影，但已知在观察到的海洋碳吸收中表现出明显的偏见。已知这些数值模型缺乏分辨率（空间和时间），以充分代表许多中尺度过程和已知在空气交换中有效作用的特征。 To account for the ocean mesoscale (10km - 100km) phenomena, such as jets, fronts, meanders and eddies known to be crucial for bio-physical interactions of CO2 fluxes, this project will progressively increase model resolution from coarse to finer grid spacing, furthering our understanding of mesoscale processes.The study will focus on regions of interest, the austral South Pacific, and the Drake Passage.这两个区域在某种程度上都被很好地观察到。这两个区域是大西洋圆极电流的地形约束途径组成的途径，并表现出增强的涡流活性。数值输出将与观测值进行比较，并且将使用一组生物地球化学示踪剂来检查生物物理交互过程，该过程发生在正面和涡流中。研究的结果可以提供过程，特定的指标和诊断，以评估和校准全球气候碳模型。博士本科实习生将接受培训并获得研究洞察。该奖项反映了NSF的法定任务，并被认为是值得通过基金会的知识分子优点和更广泛影响的评论标准来评估值得支持的。

项目成果

Physical and Biological Controls of the Drake Passage pCO 2 Variability

Drake 通道 pCO 2 变异性的物理和生物控制

• DOI: 10.1029/2020gb006644
• 发表时间: 2020
• 期刊: Global Biogeochemical Cycles
• 影响因子: 5.2
• 作者: Jersild, Annika;Ito, Takamitsu
• 通讯作者: Ito, Takamitsu

Development of the Regional Carbon Cycle Model in the Central Pacific Sector of the Southern Ocean

南大洋中太平洋区域区域碳循环模型的开发

• DOI: 10.1029/2021ms002757
• 发表时间: 2022
• 期刊: Journal of Advances in Modeling Earth Systems
• 影响因子: 6.8
• 作者: Ito, Takamitsu

Mesoscale Eddies Regulate Seasonal Iron Supply and Carbon Drawdown in the Drake Passage

中尺度涡流调节德雷克海峡的季节性铁供应和碳减少

• DOI: 10.1029/2021gl096020
• 发表时间: 2021
• 期刊: Geophysical Research Letters
• 影响因子: 5.2
• 作者: Jersild, Annika;Delawalla, Sara;Ito, Takamitsu
• 通讯作者: Ito, Takamitsu

Ligand Binding Strength Explains the Distribution of Iron in the North Atlantic Ocean

配体结合强度解释了北大西洋中铁的分布

• DOI: 10.1029/2019gl083319
• 发表时间: 2019
• 期刊: Geophysical Research Letters
• 影响因子: 5.2
• 作者: Pham, Anh L. D.;Ito, Takamitsu
• 通讯作者: Ito, Takamitsu