Suboxic Sediments and the Phosphate-Cadmium-Carbon Isotope Relation in the Ocean: Potential Decoupling Between Paleo-Nutrient Proxies
Suboxic Sediments and the Phosphate-Cadmium-Carbon Isotope Relation in the Ocean: Potential Decoupling Between Paleo-Nutrient Proxies
批准号:
9417038
负责人:
Alexander van Geen
金额:
$30.99万
依托单位:
依托单位国家:
美国
项目类别:
Continuing Grant
财政年份:
1995
资助国家:
美国
项目状态:
已结题
起止时间:
1995-01-15 至 1997-12-31
中文摘要
9417038 Van Geen这个项目将检验亚氧沉积物中Cd的积累增强的假设,这可能会改变全球海洋清单。Cd是用于推断深海营养物质含量的两种示踪剂之一,目前Cd的结果与另一种示踪剂13-C的结果不一致。确定差异的原因将使人们能够更准确地估计过去的海洋营养物质,这些营养物质与初级生产力有关,因此也与全球碳循环有关。***
英文摘要
9417038 van Geen This project will test the hypothesis that accumulation of Cd is enhanced in suboxic sediments, potentially altering the global oceanic inventory. Cd is one of two tracers used to infer nutrient content of the deep ocean, and at present results from Cd do not agree with those of the other tracer, 13-C. Determining the cause of the discrepancy will permit more accurate estimates of past ocean nutrients, which are related to primary production and therefore to the global carbon cycle. ***
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Collaborative Research: Informal risk-sharing and private initiative to mitigate local environmental risks
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批准号:1853289
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项目类别:Continuing Grant
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资助金额:$31.97万
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财政年份:2019
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负责人:Alexander van Geen
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依托单位:
CNH: Competing Demands and Future Vulnerability of Groundwater: Drinking Water Quality and Food Security in Arsenic-Impacted South and Southeast Asia
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批准号:1414131
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项目类别:Standard Grant
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资助金额:$145.0万
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财政年份:2014
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负责人:Alexander van Geen
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依托单位:
Development of Freeze-Shoe Sampler to Recover Aquifer Sands with In-situ Groundwater From up to 1000-ft Depth
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批准号:1160753
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项目类别:Continuing Grant
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资助金额:$57.56万
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财政年份:2013
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负责人:Alexander van Geen
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依托单位:
Workshop proposal: Recovering Uncompromised Samples of Aquifer Sands with In-Situ Groundwater from up to 300-m Depth in South and Southeast Asia
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批准号:1105148
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项目类别:Standard Grant
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资助金额:$2.0万
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财政年份:2011
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负责人:Alexander van Geen
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依托单位:
Hydrographic and sediment-trap monitoring of anoxic Soledad Basin off Baja California for enhanced climate reconstructions: An interdisciplinary planning workshop
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批准号:0927822
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项目类别:Standard Grant
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资助金额:$4.42万
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财政年份:2009
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负责人:Alexander van Geen
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依托单位:
Collaborative Research: Enhancing the sustainability of groundwater pumping from low-arsenic aquifers in southern Asia - a case-study in Vietnam south of Hanoi.
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批准号:0911557
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项目类别:Standard Grant
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资助金额:$48.93万
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财政年份:2009
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负责人:Alexander van Geen
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依托单位:
Collaborative Research: Vertical control of groundwater arsenic concentrations in shallow Bangladesh aquifers
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批准号:0345688
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项目类别:Standard Grant
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资助金额:$0.0万
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财政年份:2004
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负责人:Alexander van Geen
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依托单位:
Abiotic arsenic mobilization in Bangladesh groundwater aquifers?
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批准号:0433886
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项目类别:Standard Grant
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资助金额:$9.94万
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财政年份:2004
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负责人:Alexander van Geen
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依托单位:
Collaborative Research: A High-resolution Record of Productivity and/or Ventilation of the Northeastern Pacific from Soledad Basin, Baja California
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批准号:0214221
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项目类别:Standard Grant
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资助金额:$31.64万
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财政年份:2002
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负责人:Alexander van Geen
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依托单位:
Biocomplexity IDEA: Portable Devices To Map The Distribution of Arsenic In Bangladesh Groundwater & The Relation To Sediment Structure
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批准号:0119933
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项目类别:Standard Grant
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资助金额:$10.0万
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财政年份:2001
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负责人:Alexander van Geen
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依托单位:
Collaborative Research: Coastal Ocean Advances in Shelf Transport (COAST): Iron Input and Wind-driven Circulation along the Oregon Coast
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批准号:9907953
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项目类别:Continuing Grant
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资助金额:$26.39万
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财政年份:2000
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负责人:Alexander van Geen
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依托单位:
SGER: Calibration of a New Upwelling Proxy for the Peru/Humboldt Current
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批准号:0083506
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项目类别:Standard Grant
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资助金额:$4.68万
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财政年份:2000
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负责人:Alexander van Geen
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依托单位:
Acquisition of High-Resolution ICP-MS with Laser Ablation for Earth, Ocean, and Environmental Science Research and Training
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批准号:9977429
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项目类别:Standard Grant
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资助金额:$14.0万
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财政年份:1999
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负责人:Alexander van Geen
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依托单位:
Coring the Oxygen Minimum Zone off Baja, California to Reconstruct Holocene Climate Variability in the North Pacific
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批准号:9809026
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项目类别:Continuing Grant
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资助金额:$43.39万
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财政年份:1999
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负责人:Alexander van Geen
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依托单位:
Coastal Upwelling Along the Western Americas: Past, Presentand Future
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批准号:9633173
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项目类别:Standard Grant
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资助金额:$4.62万
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财政年份:1997
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负责人:Alexander van Geen
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依托单位:
Instrumentation to Study Aspects of Cadmium and Phosphate Geochemistry Relevant to Paleoceanography and Physical Oceanography
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批准号:9530350
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项目类别:Standard Grant
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资助金额:$9.02万
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财政年份:1996
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负责人:Alexander van Geen
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依托单位:
Insolation and Upwelling in the Northeast Pacific during the Holocene: Quantifying the Link with Cd/Ca Ratios in Estuarine Foraminifera
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批准号:9402372
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项目类别:Continuing Grant
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资助金额:$22.6万
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财政年份:1994
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负责人:Alexander van Geen
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依托单位:
海外基金