| 项目编号: | 1406219
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| 项目名称: | Collaborative Research: Reconstruction of Carbon Monoxide in the Pre-Industrial Arctic Atmosphere from Ice Cores at Summit, Greenland |
| 作者: | Joseph McConnell
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| 承担单位: | Nevada System of Higher Education, Desert Research Institute
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| 批准年: | 2014
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| 开始日期: | 2015-01-01
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| 结束日期: | 2018-08-31
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| 资助金额: | USD138043
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| 资助来源: | US-NSF
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| 项目类别: | Standard Grant
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| 国家: | US
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| 语种: | 英语
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| 特色学科分类: | Geosciences - Polar
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| 英文关键词: | carbon monoxide concentration
; ice
; entire ice core
; pre-industrial carbon monoxide budget
; carbon monoxide
; ice layer
; ice core chronology
; pre-industrial carbon monoxide
; arctic atmosphere
; blue ice drill
; carbon monoxide isotope measurement
; novel ice drilling
; carbon monoxide production
; ice core
; firn-ice gas transport
; new large diameter ice core
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| 英文摘要: | The main goal of the proposed work is to provide the first reliable record of pre-industrial carbon monoxide (CO) concentration and stable isotope composition in the Arctic atmosphere, which would also be representative of a large part of the Northern Hemisphere. Carbon monoxide concentrations are a crucial component of any complete modern or past atmospheric data set because CO plays a key role in global atmospheric chemistry by being the largest single sink of hydroxyl radicals in the lower atmosphere. Carbon monoxide concentration in combination with stable isotopes is also a powerful tracer for large-scale biomass burning variations. Pre-industrial carbon monoxide concentration in the northern hemisphere (where anthropogenic impacts have been by far the strongest) is poorly characterized, with prior measurements made using an older technique in the 1990s on only a few samples from one ice core. No published carbon monoxide isotope measurements from northern hemisphere ice cores are currently available.
The investigators propose to collect a new large diameter ice core near Summit, Greenland using the Blue Ice Drill (BID), providing ice from 80 to 170 meters depth (air age from about 1960 to about 1600 AD). Continuous measurements of carbon monoxide concentration would provide a high-resolution record over the entire ice core and identify ice layers where carbon monoxide is well preserved. High-precision discrete analyses of carbon monoxide concentration and isotopic composition would then target ice from these layers. Continuous analyses of trace chemistry and discrete analyses of trace organics would also be conducted to establish the ice core chronology and improve understanding of mechanisms of in situ carbon monoxide production in ice. Atmospheric histories for carbon monoxide concentration and isotopic composition would be derived using a combination of firn-ice gas transport and inverse models, and the implications for pre-industrial carbon monoxide budget would be investigated with the use of a climate-chemistry model. The proposed approach maximizes the chance of obtaining a reliable history of carbon monoxide concentration and isotopic composition through careful site selection and the application of novel ice drilling and analytical techniques. Results from the study will be made available to the scientific community and the general public through the NSIDC and NOAA Paleoclimatology data centers. The work will contribute to the training of two graduate and 2 undergraduate students, support an early career investigator, and establish several new collaborations among the investigators. The investigators have a strong history of and commitment to scientific outreach in the forms of media interviews, participation in educational films, as well as speaking to schools and the public about their research, and will continue these activities as part of the proposed work. |
| 资源类型: | 项目
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/95245
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| Appears in Collections: | 影响、适应和脆弱性
气候减缓与适应
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| Recommended Citation: | |
Joseph McConnell. Collaborative Research: Reconstruction of Carbon Monoxide in the Pre-Industrial Arctic Atmosphere from Ice Cores at Summit, Greenland. 2014-01-01.
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