Understanding Atmospheric Sulfur Cycle using Triple Isotopes of Oxygen and Sulfur (ASCTIOS)
Understanding Atmospheric Sulfur Cycle using Triple Isotopes of Oxygen and Sulfur (ASCTIOS)
批准号:
0960594
负责人:
Mark Thiemens
金额:
$36.8万
依托单位国家:
美国
项目类别:
Standard Grant
财政年份:
2010
资助国家:
美国
项目状态:
已结题
起止时间:
2010-05-01 至 2013-04-30
中文摘要
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英文摘要
Sulfate is a significant chemical component of atmospheric aerosols; however, the chemistry governing its formation over a large portion of the globe, particularly the high latitudes and southern hemisphere remains unconstrained. At present there are sparse measurements of sulfur dioxide fluxes from anthropogenic and natural sources, particularly in the southern hemisphere. Sulfate aerosols interact strongly with incoming solar and outgoing terrestrial radiations by scattering and absorption, therefore size distribution is of high significance to understand the mode of interaction of sulfate aerosols with radiation. The primary objective of this study is to develop an isotopic probe of atmospheric sulfate chemistry in a pristine marine environment at Cape Grim Baseline Air Pollution Station, Australia to identify the role of sea salt alkalinity on the oxidation of sulfur. Oxygen and sulfur isotope measurements will be used to better constrain the sources and chemistry controlling the formation and transport of sulfate aerosol in the atmosphere. These results will be used to interpret paleo-sulfate aerosol data obtained from Antarctic ice cores and to identify the contribution of anthropogenic sulfur to the natural sulfur cycle.This research will help to elucidate the impact of sulfur chemistry on climate in a clean oceanic background at Cape Grim Station, Australia. This will establish a baseline for evaluating temporal and spatial variations in sulfate aerosols and will provide a basis for the future interpretation of ice core data. In view of the inherent problems associated with global chemistry models used to reproduce the sulfate levels, this new analytical tool has the potential to improve global chemistry models and in turn this may enable a better diagnosis of potential changes that result from anthropogenic sulfate sources. This project also has the broader goal of furthering the development of human resources in the field by training a postdoctoral scientist and graduate and undergraduate students.
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批准号:2204474
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项目类别:Standard Grant
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资助金额:$26.39万
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财政年份:2022
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依托单位:
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批准号:2009959
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依托单位:
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批准号:1259305
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资助金额:$43.73万
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财政年份:2013
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依托单位:
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批准号:0819977
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项目类别:Standard Grant
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资助金额:$27.5万
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财政年份:2008
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负责人:Mark Thiemens
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依托单位:
Collaborative Research: An Isotope MIF Study of Volcanic Events in Greenland Ice Cores
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批准号:0612422
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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:2006
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负责人:Mark Thiemens
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依托单位:
Scholarships for Quantitative and Interdisciplinary Science Majors
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批准号:0630922
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项目类别:Standard Grant
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资助金额:$49.91万
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财政年份:2006
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负责人:Mark Thiemens
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依托单位:
Collaborative Research: Multiple-isotope Analysis of Nitrate and Sulfate in the West Antarctic Ice Sheet Divide Ice Core
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批准号:0538520
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项目类别:Continuing Grant
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资助金额:$19.2万
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财政年份:2006
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负责人:Mark Thiemens
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依托单位:
Complete Isotopic Analysis of Aerosol Sulfate and Nitrate in Long-Term Samplings from the Tropical Atlantic
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批准号:0431483
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项目类别:Continuing Grant
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资助金额:$41.59万
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财政年份:2004
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负责人:Mark Thiemens
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依托单位:
Collaborative Research: Investigation Atomospheric Chemisty and Dynamics Through Oxygen and Sulfur Isotopes in Volcanic Sulfate from South Pole Ice Cores
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批准号:0338363
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项目类别:Standard Grant
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资助金额:$8.69万
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财政年份:2004
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负责人:Mark Thiemens
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依托单位:
U.S.-France Dissertation Enhancement: Variations in Dissociation Energies and Rates for Multiple NO2
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批准号:0129286
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项目类别:Standard Grant
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资助金额:$1.5万
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财政年份:2002
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负责人:Mark Thiemens
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依托单位:
U.S.-France Cooperative Research: Nitrogen and Sulfur Cycles in Antarctica Inferred from Concentration and Isotopic Measurements
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批准号:0128971
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项目类别:Standard Grant
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资助金额:$1.91万
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财政年份:2002
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负责人:Mark Thiemens
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依托单位:
South Pole Atmospheric Nitrate Isotopic Analysis (SPANIA)
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批准号:0125761
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项目类别:Standard Grant
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资助金额:$33.83万
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财政年份:2002
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负责人:Mark Thiemens
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依托单位:
Sulfur and Oxygen Isotopic Signatures for Sulfur Dioxide Oxidation Mechanisms
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批准号:0111714
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项目类别:Standard Grant
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资助金额:$30.0万
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财政年份:2001
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负责人:Mark Thiemens
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依托单位:
The Use of Oxygen Isotopes to Resolve the Tropospheric Ozone Budget
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批准号:9820999
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项目类别:Continuing Grant
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资助金额:$28.0万
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财政年份:1999
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负责人:Mark Thiemens
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依托单位:
The Measurement of Mass Independent Isotopic Compositions in Atmospheric Species as a New Index of Global Processes
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批准号:9711203
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项目类别:Continuing Grant
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资助金额:$35.0万
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财政年份:1997
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负责人:Mark Thiemens
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依托单位:
Development of a New Multi-Isotope Technique for Atmospheric Carbon Monoxide Studies
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批准号:9510665
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项目类别:Continuing Grant
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资助金额:$16.61万
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财政年份:1995
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负责人:Mark Thiemens
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依托单位:
The Measurement of Mass Independent Isotopic Compositions in Atmospheric Species as a New Indice of Global Processes
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批准号:9321202
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项目类别:Standard Grant
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资助金额:$33.0万
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财政年份:1994
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负责人:Mark Thiemens
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依托单位:
High Precision Oxygen Isotope Ratio Measurements in Atmospherically Important Reactions and in Air Species
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批准号:9020462
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项目类别:Continuing Grant
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资助金额:$47.47万
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财政年份:1991
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负责人:Mark Thiemens
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依托单位:
The Study of Oxygen Isotopic Fractionation Mechanisms in Ozone Formation and Measurement of these ratios in air O2 at ultrahigh precision.
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批准号:8721051
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项目类别:Continuing Grant
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资助金额:$30.98万
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财政年份:1988
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负责人:Mark Thiemens
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依托单位:
The Study of Isotopic Fractionation Processes in Atmos- pherically Relevant Reactions and the Measurement of these Ratios in High Altitude Samples
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批准号:8515648
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项目类别:Continuing Grant
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资助金额:$17.6万
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财政年份:1986
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负责人:Mark Thiemens
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依托单位:
海外基金