| 项目编号: | 1602946
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| 项目名称: | Collaborative Research: Responses of atmospheric oxidants and CO2 to dramatic changes in Arctic sea ice |
| 作者: | Francisco Chavez
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| 承担单位: | Monterey Bay Aquarium Research Institute
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| 批准年: | 2016
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| 开始日期: | 2016-08-01
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| 结束日期: | 2019-07-31
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| 资助金额: | 75000
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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: | sea ice
; arctic ocean
; project
; arctic
; cold regions research
; sea water
; cutting-edge scientific research
; sea-ice property
; o-buoy
; arctic atmosphere?s chemistry
; arctic warming
; arctic atmosphere
; arctic region
; major atmospheric oxidant
; gas exchange flux
; carbon dioxide air-ice-ocean flux important cause
; sea salt
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| 英文摘要: | The Arctic region has unique atmospheric chemistry leading to both positive and negative human health impacts, such as the depletion of ground-level ozone and the deposition of mercury. Atmospheric carbon dioxide uptake into sea water, moderated by the time-varying amount of sea ice cover, causes acidification of Arctic Ocean waters with potentially important impacts on the marine ecosystem. One expects that the atmosphere and its chemistry will respond in a complex manner to sea ice change and Arctic warming, but the science community lacks the ability to make predictions with confidence given only basic mechanistic understanding of the relevant processes. The O-Buoy Chemical Network project was funded under an Arctic Observing Network grant to observe atmospheric chemicals, meteorology, and sea-ice properties that can improve our understanding of the relevant processes and thus improve predictability of scenarios of future climate. That project has deployed fifteen autonomous buoys measuring three sentinel atmospheric chemical species, each for roughly a year?s time, spread across the Arctic Ocean, providing detailed, high-time-resolution data relevant to understanding the Arctic atmosphere?s chemistry in relation to sea ice. In this project, the science team will synthesize, interpret, and generate fundamental understanding from the O-Buoy network data. In addition, GEOS-Chem modeling combined with the O-Buoy measurements will be used to develop a region wide understanding of the relationship between the Arctic atmosphere and sea ice.
This project will contribute to STEM manpower development in a number of ways. It will provide support for an early career scientist during the formative years of his career. It will support the training of three Ph.D. students and engage multiple undergraduate students. Efforts will be made to draw these latter students from groups under-represented in the STEM fields by leveraging the resources of the Dartmouth College Women in Science Program (WISP) and the Alaska Native Science and Engineering Program (ANSEP) at the University of Alaska. Outreach to the K - gray community will be enabled through leveraging of existing programs such as the NSF-funded Next Generation WeatherBlur Project, the US Army Corps of Engineers' Cold Regions Research and Engineering Laboratory's summer science camp for New Hampshire middle school students, the University of Alaska's annual Spring Science Potpourri open house, the weekly Café Scientifique in Boothbay Harbor, Maine: a summer lecture series that promotes public engagement with cutting-edge scientific research, and the extensive web presence of the Bigelow Laboratory for Ocean Sciences.
The Arctic Ocean's overlying atmosphere is characterized by production of reactive halogen oxidizers from sea salts that lead to depletion of ground-level ozone and deposition of mercury. This production is believed to be modulated by the state of the sea ice cover. This project will answer three specific science questions relevant to the overarching question "How do changes in the Arctic Ocean environment, especially sea ice, affect the atmosphere?" via statistical analysis and modeling approaches. Statistical methods will test and improve process understanding while modeling approaches will be used to improve quantification of gas exchange fluxes with the Arctic Ocean through the fractured, drifting, sea ice and to predict fluxes of reactive halogen oxidizers and their precursors from sea ice. These modeling exercises make full use of the data from the O-Buoys covering the Arctic Ocean region from 2009-2016+, a period which has had a great deal of sea ice variability and reduced sea ice compared to historical averages. The three specific questions constituting the foci for this project are:
Q1: Under what conditions are carbon dioxide air-ice-ocean fluxes important causes of atmospheric carbon dioxide variability over the Arctic Ocean and, conversely, when is long-range transport important?
Q2: How do Arctic Ocean sea ice, snow, and vertical mixing conditions affect major atmospheric oxidants (ozone and reactive halogens)?
Q3: How do interannual variability and long-term declines in sea ice affect atmospheric contaminants in the Arctic? |
| 资源类型: | 项目
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/91598
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| Appears in Collections: | 全球变化的国际研究计划
科学计划与规划
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| Recommended Citation: | |
Francisco Chavez. Collaborative Research: Responses of atmospheric oxidants and CO2 to dramatic changes in Arctic sea ice. 2016-01-01.
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