Impact of Photochemistry on Carbon Cycling in the Sea

光化学对海洋碳循环的影响

基本信息

项目摘要

ABSTRACTOCE-0096426Photo-remineralization of (DOM) in seawater can occur both directly through the photoproduction of dissolved inorganic carbon (DIC) as CO2 and CO, and secondarily through coupled photochemical and biological pathways acting on other photoproducts. Based on their observed CO and CO2 (DIC) photoproduction rates, the PIs currently estimate that some 0.2-1.5% of DOM (measured as DOC) may be directly remineralized daily, yielding a photochemical half-life for DOC in surface seawater of between 46-347 days. Half-life estimates of DOM are further reduced when photochemically enhanced microbial respiration of photoxidation product substrates is considered. The research to be undertaken in the current proposal is directed at better constraining these estimates and evaluating their biogeochemical significance compared to levels of primary production and microbial activity. Research cruises to a range of coastal and open ocean environments are to be undertaken to better estimate the photochemical carbon flux.
海水中DOM (DOM)的光再矿化既可以直接通过溶解无机碳(DIC)作为CO2和CO的光产物进行,也可以通过作用于其他光产物的耦合光化学和生物途径进行。根据观察到的CO和CO2 (DIC)光产生速率,pi目前估计每天约有0.2-1.5%的DOM(以DOC测量)可以直接再矿化,使DOC在表层海水中的光化学半衰期在46-347天之间。当考虑光化学增强的光氧化产物底物的微生物呼吸作用时,DOM的半衰期估计进一步降低。目前提案中将要进行的研究旨在更好地限制这些估计,并与初级产量和微生物活动水平相比,评估其生物地球化学意义。为了更好地估计光化学碳通量,将对一系列沿海和开放海洋环境进行研究巡航。

项目成果

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Kenneth Mopper其他文献

Kenneth Mopper的其他文献

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{{ truncateString('Kenneth Mopper', 18)}}的其他基金

Collaborative Research: A dual-dye approach to measuring in situ light fields: development and preliminary field testing
合作研究:测量原位光场的双染料方法:开发和初步现场测试
  • 批准号:
    1235005
  • 财政年份:
    2012
  • 资助金额:
    $ 25.78万
  • 项目类别:
    Standard Grant
Development of a High-Precision TOC/DOC Analyzer With a nM Detection Limit
开发具有 nM 检测限的高精度 TOC/DOC 分析仪
  • 批准号:
    0850635
  • 财政年份:
    2009
  • 资助金额:
    $ 25.78万
  • 项目类别:
    Standard Grant
Collaborative Research: Comprehensive Chemical Characterization of Marine Dissolved Organic Matter using Efficient Isolation Coupled to Advanced Analytical Techniques
合作研究:利用高效分离结合先进分析技术对海洋溶解有机物进行综合化学表征
  • 批准号:
    0728634
  • 财政年份:
    2007
  • 资助金额:
    $ 25.78万
  • 项目类别:
    Standard Grant
COLLABORATIVE RESEARCH: IMPACT OF DOM SOURCE AND PHOTOOXIDATION ON CARBON CYCLING IN ESTUARIES
合作研究:DOM 源和光氧化对河口碳循环的影响
  • 批准号:
    0327446
  • 财政年份:
    2004
  • 资助金额:
    $ 25.78万
  • 项目类别:
    Standard Grant
U.S.-Brazil Cooperative Research: The Production and Fate of Algal Extracellular Polysaccharides in a Eutrophic Reservoir Near Sao Paulo, Brazil
美国-巴西合作研究:巴西圣保罗附近富营养化水库中藻类胞外多糖的产生和归宿
  • 批准号:
    0196218
  • 财政年份:
    2001
  • 资助金额:
    $ 25.78万
  • 项目类别:
    Standard Grant
Impact of Photochemistry on Carbon Cycling in the Sea
光化学对海洋碳循环的影响
  • 批准号:
    0196220
  • 财政年份:
    2001
  • 资助金额:
    $ 25.78万
  • 项目类别:
    Continuing Grant
U.S.-Brazil Cooperative Research: The Production and Fate of Algal Extracellular Polysaccharides in a Eutrophic Reservoir Near Sao Paulo, Brazil
美国-巴西合作研究:巴西圣保罗附近富营养化水库中藻类胞外多糖的产生和归宿
  • 批准号:
    0000657
  • 财政年份:
    2000
  • 资助金额:
    $ 25.78万
  • 项目类别:
    Standard Grant
Impact of Photochemistry on Carbon Cycling in the Sea
光化学对海洋碳循环的影响
  • 批准号:
    9711206
  • 财政年份:
    1998
  • 资助金额:
    $ 25.78万
  • 项目类别:
    Continuing grant
Collaborative Research: Photochemical and Optical Properties of Antarctic Waters in Response to Changing UV-B Fluxes
合作研究:南极水域的光化学和光学特性对 UV-B 通量变化的响应
  • 批准号:
    9527255
  • 财政年份:
    1996
  • 资助金额:
    $ 25.78万
  • 项目类别:
    Standard Grant
Low Molecular Weight Carbonyls in Seawater: Formation Via Photochemical Processes and Role in the Chemistry of Humic Substances
海水中的低分子量羰基:通过光化学过程形成及其在腐殖质化学中的作用
  • 批准号:
    9315821
  • 财政年份:
    1993
  • 资助金额:
    $ 25.78万
  • 项目类别:
    Continuing grant

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Tailoring Single-Walled Carbon Nanotubes with Structure-Selective Photochemistry
利用结构选择性光化学定制单壁碳纳米管
  • 批准号:
    1803066
  • 财政年份:
    2018
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The impact of dissolved organic matter photochemistry on the carbon and nutrient cycling in arctic and subarctic marine ecosystems
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  • 批准号:
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The impact of dissolved organic matter photochemistry on the carbon and nutrient cycling in arctic and subarctic marine ecosystems
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  • 批准号:
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  • 财政年份:
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Biogenic Volatile Organic Carbon (VOC) Emission and Organic Aerosol Composition During the Biosphere Effects on Aerosol and Photochemistry Experiment (BEARPEX)
生物圈对气溶胶影响和光化学实验(BEARPEX)期间生物挥发性有机碳(VOC)排放和有机气溶胶成分
  • 批准号:
    0922562
  • 财政年份:
    2009
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    $ 25.78万
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The impact of dissolved organic matter photochemistry on the carbon and nutrient cycling in arctic and subarctic marine ecosystems
溶解有机物光化学对北极和亚北极海洋生态系统碳和养分循环的影响
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The impact of dissolved organic matter photochemistry on the carbon and nutrient cycling in arctic and subarctic marine ecosystems
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海洋光化学:对碳和微量金属循环的意义
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    170324-1995
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线性和环状碳簇的光化学
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