| Project/Area Number |
22310015
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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 | 一般 |
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| Research Field |
Environmental dynamic analysis
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| Research Institution | Japan, Meteorological Research Institute |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
YAMAZAKI Akihiro 気象庁気象研究所, 気候研究部, 主任研究官 (40278106)
NAKAYAMA Tomoki 名古屋大学, 太陽地球環境研究所, 助教 (40377784)
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| Co-Investigator(Renkei-kenkyūsha) |
MATSUMI Yutaka 名古屋大学, 太陽地球環境研究所, 教授 (30209605)
KUDO Rei 気象庁気象研究所, 気候研究部, 研究官 (00414508)
SAKAMI Tomonori 気象庁気象研究所, 気候研究部, 研究官 (00391227)
NAGAI Tomohiro 気象庁気象研究所, 気象衛星・観測システム研究部, 主任研究官 (30343891)
SAKAI Tetsu 気象庁気象研究所, 気象衛星・観測システム研究部, 主任研究官 (00377988)
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| Project Period (FY) |
2010 – 2012
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| Project Status |
Completed (Fiscal Year 2012)
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| Budget Amount *help |
¥17,030,000 (Direct Cost: ¥13,100,000、Indirect Cost: ¥3,930,000)
Fiscal Year 2012: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Fiscal Year 2011: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2010: ¥11,440,000 (Direct Cost: ¥8,800,000、Indirect Cost: ¥2,640,000)
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| Keywords | 環境計測 / エアロゾル / 地球温暖化 / ネフェロメーター / キャビティリングダウン分光 |
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| Research Abstract |
In order to measure aerosol optical properties accurately, an instrument to measure angular distribution of scattered light by aerosol (polar-nephelometer) and an instrument to measure extinction coefficients using the technique of cavity ring-down spectroscopy (CRDS) were developed.
The CRDS instrument developed by this study can measure extinction coefficients at 355 and 532nm. The instrument was evaluated using monodisperse laboratory-generated polystyrene latex (PSL) particles. The measured values and the values calculated by Mie theory were coincident within 0.4%(mean value) (max. 3%) at wavelength 532nm and 1.2% (mean value) (max. 3%) at wavelength 355nm.
The polar-nephelometer can measure the scattered light from the scattering angle 4o to 176o at every 4o or 10o at wavelength of 532nm. After the calibration using CO2 and aerosol free air, the instrument was evaluated using PSL particles and the real atmospheric sample air. The results showed that the polar-nephelometer can measure scattering coefficients by itself without the light source correction.
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