| Project/Area Number |
21500995
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Geography
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| Research Institution | Tokyo University of Information Sciences |
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Principal Investigator |
HARADA Ippei 東京情報大学, 総合情報学部, 博士研究員 (80451748)
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| Co-Investigator(Renkei-kenkyūsha) |
KUZE Hiroaki 千葉大学, 環境リモートセンシング研究センター, 教授 (00169997)
MACHIDA Isao 独立行政法人産業技術総合研究所, 地質調査総合センター, 研究員 (80435768)
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| Project Period (FY) |
2009 – 2011
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| Project Status |
Completed (Fiscal Year 2011)
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| Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2011: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2010: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2009: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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| Keywords | 自然現象観測・予測 / 計測工学 / 火山噴出物 / 火山ガス / DOAS / 三宅島 / 植生の変遷 / リモートセンシング / 地下水水質 |
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| Research Abstract |
Since the volcanic eruption in the year 2000, continuous monitoring of sulfur dioxide(SO_2) gas has been conducted in Miyakejima, a volcano island around 180 km south of Tokyo. Since the sampling measurements are carried out at 14 observation posts, all located along the seashore road, it is difficult to monitor exact pollution levels inside the areas where high concentration of SO_2 often takes place. In this paper we report on our differential optical absorption spectroscopy(DOAS) measurements carried out inside the highly-polluted, restricted areas in Miyakejima in December 2009 and September 2010.The DOAS method enables the monitoring of SO_2 concentration averaged over a light path of several hundred meters with high temporal resolution of around 5 min. The comparison of DOAS data and ground sampling posts nearby the light path has exhibited similar temporal behavior, indicating that highly concentrated SO_2 gas is in fact distributed in a range of several hundred meters. The combinatory measurements with two DOAS paths perpendicular to each other have revealed that the distribution of volcanic gas near the ground level is determined by both geographical features and wind fields.
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