Oxygen Utilization and Nutrient Remineralization Rates in the Pacific Ocean (Supplement to Continuation of Models of the Pacific Basin Circulation Based on WOCE-era Observations)
太平洋的氧气利用率和营养物再矿化率(基于 WOCE 时代观测的太平洋盆地环流模型的补充)
基本信息
- 批准号:0326162
- 负责人:
- 金额:$ 11.5万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Standard Grant
- 财政年份:2003
- 资助国家:美国
- 起止时间:2003-09-01 至 2005-08-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
ABSTRACTOCE-0326162Biogeochemical cycling will be studied in a multi-box inverse model of the Pacific Ocean with focus on oxygen utilization and nutrient remineralization rates. The inverse model was developed under previous grants incorporating for the first time all the main WOCE hydrographic sections collected in the Pacific Ocean to determine zonal and meridional transports within density layers as well as diapycnal fluxes and air-sea exchange fluxes. Biogeochemical fluxes will be added in the model to investigate, on basin-scale, the depth-dependent rates at which oxygen is consumed and nitrate, phosphate, silicate, and total alkalinity (TA) are produced below the euphotic zone. The formulation of this inverse model differs from previous models in that the biogeochemical source/sink terms are explicitly included as unknowns. Through the incorporation of these terms, it is possible to put constraints on the biogeochemical rates. We propose to perform a set of model experiments to explore this approach including coupling of oxygen utilization and phosphate and nitrate remineralization rates through Redfield ratios, introducing non-zero initial guesses for the biogeochemical rates, and imposing positivity/negativity constraints. In addition, experiments will be conducted with varying the weights of the model equations, predefining the vertical diffusivities, and evoking top-to-bottom nutrient conservation. The best estimates of oxygen utilization and nutrient/TA. remineralization rates, from which organic matter, opal, and calcium carbonate (CaCO3) export rates can be inferred, will be compared to results from tracer age based approaches and other studies in the literature. Broader Impacts: This work forms an interdisciplinary component of the ongoing synthesis of the data collected during the international WOCE program. It also represents a novel application of inverse methods (widely used in physical oceanography) to the inference of biogeochemical rates. The resulting estimates of organic carbon and CaCO3 remineralization rates will benefit the study of the oceanic component of the global carbon cycle. The funds will support a postdoctoral investigator who is in the process of establishing herself in interdisciplinary research and is interested in further combining physical and biogeochemical approaches.
摘要/ abstract摘要:研究太平洋生物地球化学循环,重点关注氧利用和养分再矿化速率。逆模型是在以前的资助下开发的,首次纳入了在太平洋收集的所有主要WOCE水文剖面,以确定密度层内的纬向和经向输送,以及潜流通量和海气交换通量。生物地球化学通量将被添加到模型中,以在盆地尺度上研究氧气消耗以及在光带以下产生硝酸盐、磷酸盐、硅酸盐和总碱度(TA)的深度依赖率。该逆模型的公式不同于以前的模型,因为生物地球化学源/汇项被明确地包括为未知数。通过合并这些术语,可以对生物地球化学速率加以限制。我们建议进行一系列模型实验来探索这一方法,包括通过Redfield比率耦合氧利用与磷酸盐和硝酸盐再矿化率,引入非零生物地球化学速率的初始猜测,以及施加正/负约束。此外,实验将通过改变模型方程的权重,预先定义垂直扩散系数,并唤起自上而下的营养守恒来进行。氧利用和养分/TA的最佳估计。再矿化率可以推断有机质、蛋白石和碳酸钙(CaCO3)的输出率,将与基于示踪剂年龄的方法和文献中其他研究的结果进行比较。更广泛的影响:这项工作构成了国际WOCE项目收集的数据正在进行的综合的跨学科组成部分。它还代表了逆方法(在物理海洋学中广泛使用)在生物地球化学速率推断中的新应用。由此得出的有机碳和CaCO3再矿化率的估计将有利于研究全球碳循环的海洋成分。该基金将资助一名博士后研究人员,该博士后研究人员正在建立自己的跨学科研究,并对进一步结合物理和生物地球化学方法感兴趣。
项目成果
期刊论文数量(0)
专著数量(0)
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会议论文数量(0)
专利数量(0)
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John Toole其他文献
Observations of the Upper Ocean from Autonomous Platforms During the Passage of Extratropical Cyclone Epsilon (2020)
温带气旋 Epsilon 通过期间自主平台对上层海洋的观测(2020)
- DOI:
10.5670/oceanog.2024.303 - 发表时间:
2024 - 期刊:
- 影响因子:2.8
- 作者:
Michael T. Zimmerman;Steven Jayne;Luc Rainville;Craig M. Lee;John Toole;James Edson;Carol Anne Clayon;Alexander Ekholm;Casey Densmore - 通讯作者:
Casey Densmore
John Toole的其他文献
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{{ truncateString('John Toole', 18)}}的其他基金
AON: Sustained observation and study of the rapidly evolving Arctic Ocean environment
AON:对快速变化的北冰洋环境的持续观测和研究
- 批准号:
2314360 - 财政年份:2023
- 资助金额:
$ 11.5万 - 项目类别:
Continuing Grant
Quantifying internal wave and mesoscale variability using Ocean Observatory Initiative data
使用海洋观测计划数据量化内波和中尺度变化
- 批准号:
1850762 - 财政年份:2019
- 资助金额:
$ 11.5万 - 项目类别:
Standard Grant
Collaborative Research: Tidal internal waves that propagate along the coast: Determining how they are generated and how far they travel
合作研究:沿着海岸传播的潮汐内波:确定它们是如何产生的以及它们传播的距离
- 批准号:
1756781 - 财政年份:2018
- 资助金额:
$ 11.5万 - 项目类别:
Standard Grant
AON: Sustained observation and analysis of the Arctic upper ocean thermohaline stratification
AON:北极上层海洋温盐层结的持续观测和分析
- 批准号:
1756100 - 财政年份:2018
- 资助金额:
$ 11.5万 - 项目类别:
Continuing Grant
Development and Field Testing of a Lift-Assisted Moored Profiler: LAMP
提升辅助系泊剖面仪的开发和现场测试:LAMP
- 批准号:
1634736 - 财政年份:2016
- 资助金额:
$ 11.5万 - 项目类别:
Standard Grant
Collaborative Research: Understanding Arctic System Change Through Synthesis of Hydrographic and Sea Ice Observations from the early 21st Century
合作研究:通过综合 21 世纪初的水文和海冰观测了解北极系统的变化
- 批准号:
1603660 - 财政年份:2016
- 资助金额:
$ 11.5万 - 项目类别:
Standard Grant
Woods Hole Oceanographic Institution - Oceanographic Instrumentation (Moored Instrumentation to Support Present and Future Field Programs)
伍兹霍尔海洋研究所 - 海洋仪器(支持当前和未来实地计划的系泊仪器)
- 批准号:
1623048 - 财政年份:2016
- 资助金额:
$ 11.5万 - 项目类别:
Continuing Grant
Collaborative Research: Completing a 10-Year Record of Deep Western Boundary Current Observations at Line W: A Contribution to the Atlantic Meridional Overturning Circulation Study
合作研究:完成W线西部深边界流观测10年记录:对大西洋经向翻转环流研究的贡献
- 批准号:
1332667 - 财政年份:2014
- 资助金额:
$ 11.5万 - 项目类别:
Standard Grant
AON: Observing the Evolving Central Arctic Ocean with Ice-Tethered Profilers
AON:用冰系剖面仪观察不断变化的北冰洋中部
- 批准号:
1303644 - 财政年份:2014
- 资助金额:
$ 11.5万 - 项目类别:
Continuing Grant
Collaborative Research: An Arctic Ocean Sea Surface pCO2 and pH Observing Network
合作研究:北冰洋海面 pCO2 和 pH 观测网络
- 批准号:
1107386 - 财政年份:2011
- 资助金额:
$ 11.5万 - 项目类别:
Standard Grant
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