Nitrification Rates and Controls: The Deep Oligotropic Nitrogen Cycle
Nitrification Rates and Controls: The Deep Oligotropic Nitrogen Cycle
批准号:
9000217
负责人:
Oliver Zafiriou
金额:
$62.2万
依托单位国家:
美国
项目类别:
Continuing Grant
财政年份:
1990
资助国家:
美国
项目状态:
已结题
起止时间:
1990-12-15 至 1995-11-30
中文摘要
硝化速率与控制:深寡向氮循环水。塔式硝化(nh3 .…N0.2和N0..2 . .N0>0.3)是重要的生物地球化学PON/DON汇和N0.3的来源。直接测量这些速率需要(1)测量底物水平,(2)检测孵育过程中的微小变化,以及(3)原位>孵育技术。地下矿化区第一次实际硝化速率将采用新的1.5 n ~ 1.80.2倍。labellingisotope技术。N0.2氧化的自然速率将通过示踪剂的转化来确定。水平 . 1.5 n.1.80 . .2 to.1.5N . . 1.80.3;同位素稀释0.1…5N.1.8.0.2和ıN0.2!池大小的变化会使nh3的氧化速率变为nh2。时间。>原位孵育将使用改良的泰勒/多尔蒂潜水孵育装置(SID)…
英文摘要
Nitrification Rates and Controls: The Deep Oligotropic NitrogenCycle Water.column nitrification (NH.3 .. N0.2 and N0..2 .. N0>0.3) is thecrucial biogeochemical PON/DON sink and source of N0.3 for newprimary production. Measuring these rates directly will requireadvances in (1) measuring substrate levels, (2) detecting smallchanges in incubations, and (3) >in situ> incubation technology. The first real nitrification rates in the subsurface Nremineralization region will use new .1.5N..1.80.2 double.labellingisotope techniques. Natural rates of N0.2 oxidation will bedetermined from transformation of tracer.level .1.5N.1.80..2 to.1.5N..1.80.3; isotope dilution of .1..5N.1.8.0.2 and ıN0.2! pool size changeswill give rates of oxidation of NH.3 to NO.2. Time.course >in situ>incubations will utilize a modified Taylor/Doherty SubmersibleIncubation Device (SID)...
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Photochemical Formation of Carbon Dioxide from Dissolved Organic Matter: A New Approach to Constraining a Major Term in Marine Carbon Cycling
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批准号:0223200
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项目类别:Standard Grant
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资助金额:$0.0万
-
财政年份:2002
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负责人:Oliver Zafiriou
-
依托单位:
Sunlight-Induced Electron Ejection in Natural Waters
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批准号:0099027
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项目类别:Standard Grant
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资助金额:$15.95万
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财政年份:2001
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负责人:Oliver Zafiriou
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依托单位:
Collaborative Research: The Effects of Aquatic Photochemistry on the Proton and Metal Binding Properties of Dissolved Organic Matter in Freshwater Systems
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批准号:0087695
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项目类别:Standard Grant
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资助金额:$8.51万
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财政年份:2001
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负责人:Oliver Zafiriou
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依托单位:
Collaborative Research: Diel Biogeochemical Cycling of CO, OCS, and HOOH in the Sargasso Sea: Measuring and Modeling Distributions, Fluxes, and Processes
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批准号:9811208
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项目类别:Continuing Grant
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资助金额:$39.34万
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财政年份:1998
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负责人:Oliver Zafiriou
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依托单位:
Effect of Superoxide on Copper and Iron Speciation in Marine Systems
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批准号:9529448
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项目类别:Continuing Grant
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资助金额:$11.55万
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财政年份:1996
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负责人:Oliver Zafiriou
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依托单位:
Chemical Remineralization and the Oceanic Oxygen and Carbon Cycles
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批准号:9417214
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项目类别:Continuing Grant
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资助金额:$54.58万
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财政年份:1994
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负责人:Oliver Zafiriou
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依托单位:
Photochemical Oxygen Consumption in Marine Waters
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批准号:9115608
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项目类别:Continuing Grant
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资助金额:$30.14万
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财政年份:1992
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负责人:Oliver Zafiriou
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依托单位:
Marine Photochemistry: Free Radicals and Reactions
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批准号:8700576
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项目类别:Continuing Grant
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资助金额:$24.01万
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财政年份:1987
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负责人:Oliver Zafiriou
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依托单位:
Biogeochemistry of Nitric Oxide and Other Trace Species in the Nitrogen Cycle
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批准号:8601618
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项目类别:Continuing Grant
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资助金额:$39.75万
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财政年份:1986
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负责人:Oliver Zafiriou
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依托单位:
Marine Photochemistry: Free Radical Sources and Reactions
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批准号:8417770
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项目类别:Continuing Grant
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资助金额:$24.48万
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财政年份:1985
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负责人:Oliver Zafiriou
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依托单位:
Marine Photochemistry: Free Radical Sources and Reactions
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批准号:8215614
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项目类别:Continuing Grant
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资助金额:$18.17万
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财政年份:1983
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负责人:Oliver Zafiriou
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依托单位:
Biogeochemistry of Nitric Oxide
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批准号:8300022
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项目类别:Continuing Grant
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资助金额:$38.11万
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财政年份:1983
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负责人:Oliver Zafiriou
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依托单位:
Chemical Effects of Light in the Sea
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批准号:8110160
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项目类别:Continuing Grant
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资助金额:$12.45万
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财政年份:1981
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负责人:Oliver Zafiriou
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依托单位:
Chemical Effects of Light in the Sea
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批准号:7909381
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项目类别:Continuing Grant
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资助金额:$18.75万
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财政年份:1979
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负责人:Oliver Zafiriou
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依托单位:
Atmospheric and Air-Sea Interactive Chemistry in the Central Equatorial Pacific
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批准号:7800997
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项目类别:Standard Grant
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资助金额:$0.94万
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财政年份:1978
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负责人:Oliver Zafiriou
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依托单位:
Chemical Effects of Light in the Sea
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批准号:7708696
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项目类别:Continuing Grant
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资助金额:$12.91万
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财政年份:1977
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负责人:Oliver Zafiriou
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依托单位:
Instructional Scientific Equipment Program
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批准号:7416159
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项目类别:Standard Grant
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资助金额:$0.2万
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财政年份:1974
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负责人:Oliver Zafiriou
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依托单位:
Organic Chemistry of the Sea: Complexity of Composition and Of Chemical Processes
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批准号:7422781
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项目类别:Continuing Grant
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资助金额:$16.83万
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财政年份:1974
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负责人:Oliver Zafiriou
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依托单位:
Chemical Effects of Light in the Sea
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批准号:7201553
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项目类别:Standard Grant
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资助金额:$14.2万
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财政年份:1972
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负责人:Oliver Zafiriou
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依托单位:
海外基金