2007 Fiscal Year Final Research Report Summary
Clarification of the impact of regional air pollution and trans-boundary air pollution to Japan caused by forest fire in east Siberia
| Project/Area Number |
16404007
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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 |
Analytical chemistry
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| Research Institution | National Institute for Environmental Studies |
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Principal Investigator |
MUKAI Hitoshi National Institute for Environmental Studies, 地球環境研究センター, 室長 (30157713)
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| Project Period (FY) |
2004 – 2007
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| Keywords | East Siberia / Forest fire / Air pollutants / Trans-boundary air pollution / Global warming |
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| Research Abstract |
In order to clarify the impact of regional air pollution in Siberia and trans-boundary air pollution to Japan caused by forest fire in Siberia, we observed the air pollutants utilizing high time resolution (daily) sampler. We conducted cooperative research with Linmological Institute, Russian Academy of Science, Siberian Branch. We made on site visit in every year to discuss how to proceed the detail of cooperative research.
The peak concentration of ionic species in aerosol was observed in 2nd August in 2005. Sulfate level exceeded 4μg/m^3. The high concentration of potassium ion is indicative of forest fire, however, the high concentration is restricted only one day, so small forest fire is expected. The possibility of trans-boundary air pollution to Japan is excluded for the larger than 10μg/m^3 of sulfate was not observed.
We analysed EANET continuous monitoring data of sulfur dioxide in Rishiri island, Tappi as well as Sado-seki. These sampling sites are all located onshore line of
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Sea of Japan, so they are susceptible to trans-boundary air pollution from Siberia. From April, to June, the concentration is extremely low except for April (6ppbv) in Sado-seki. From July to September, the concentrations of sulfur dioxide are low in 3 sampling sites. From December the high concentrations are observed in 3 sampling sites concurrently. From January to March, larger than 5ppbv of sulfur dioxide were observed three times. The backward trajectory analysis with NOAA in U.S., indicated the transport of air mass over Russia in 22nd and 23rd December, however, it was not clear that it was caused by forest fire or not. Unfortunately, we could not clarify the apparent effect of forest fire in the atmosphere from observation, however, we could make capacity building to monitor the air pollutants caused with forest fire in Siberia area. It is great contribution that we can establish air pollutants monitoring system in Siberia, where is considered the risk of forest fire by accelerated global warming. Less
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Research Products
(18 results)
