2011 Fiscal Year Final Research Report
A study on radiative and microphysical properties of mixed-phase clouds in the arctic
| Project/Area Number |
21403006
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 海外学術 |
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| Research Field |
Meteorology/Physical oceanography/Hydrology
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| Research Institution | National Institute of Polar Research |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
UCHIYAMA Akihiro 気象庁気象研究所, 気候研究部, 室長 (50354460)
KOBAYASHI Hiroshi 山梨大学, 医学工学総合研究部, 准教授 (20313786)
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| Co-Investigator(Renkei-kenkyūsha) |
YAMAZAKI Akihiro 気象庁気象研究所, 気候研究部, 主任研究官 (40278106)
SAKAMI Tomonori 気象庁気象研究所, 気候研究部, 研究官 (00391227)
YABUKI Masanori 京都大学生存圏研究所, 助教 (80390590)
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| Project Period (FY) |
2009 – 2011
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| Keywords | 北極 / 混合相雲 / 雲放射特性 / 雲微物理特性 / ニーオルスン |
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| Research Abstract |
In order to investigate the relationship between radiative and microphysical properties of mixed-phase clouds in the lower troposphere of the arctic, we have performed an intensive observation at the Norwegian Zeppelin Observatory(474 m above m. s. l.) in Ny-Alesund, Svalbard. Typical mixed-phase clouds appeared on 9 June 2011, and were measured by cloud microphysics probes installed at the observatory. In-situ measurements showed a bi-modal size distribution of cloud particles ; water droplets with radii around 15μm and ice-dominant mixed-phase particles with equivalent radii around 100μm. Thus the result has suggested that the cloud albedo effect is dominated by water droplets and the contribution of ice particles is rather important in the cloud-atmosphere heat balance process.
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