2016 Fiscal Year Final Research Report
Frost flowers and sea-salt aerosols over seasonal sea-ice areas in north-western Greenland during winter-spring
| Project/Area Number |
25550018
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Environmental dynamic analysis
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| Research Institution | Fukuoka University |
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Principal Investigator |
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| Research Collaborator |
HIRABAYSHI Motohiro 国立極地研究所, 特任助手
YAMSAKI Tetsuhide Avangnaq
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| Project Period (FY) |
2013-04-01 – 2017-03-31
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| Keywords | 海塩粒子 / フロストフラワー / ハロゲン / 極域 |
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| Outline of Final Research Achievements |
Simultaneous observations of frost flowers, brine, and aerosol particles were conducted around Siorapaluk in northwestern Greenland. Water-soluble frost flower and brine constituents are sea salt constituents. Concentration factors of sea-salts of frost flowers and brine relative to seawater were 1.14 - 3.67. Sea-salt enrichment of Mg2+, K+, Ca2+, and halogens in frost flowers related to associated with sea-salt fractionation. High aerosol number concentrations correspond to higher abundance of sea-salt particles in both coarse and fine modes, and blowing snow and strong winds. Coarse and fine sea-salt particles were found to be rich in Mg. Strong Mg enrichment might be more likely to proceed in fine sea-salt particles. Mg-rich sea-salt particles might be released from the surface of snow and slush layer on sea-ice and frost flowers. Mirabilite-like and ikaite-like particles were identified only near new sea-ice areas. We propose and describe sea-salt cycles in seasonal sea-ice areas.
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| Free Research Field |
大気化学
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