2007 Fiscal Year Final Research Report Summary
Studies on Size Distribution and Mixing State of Black Carbon Aerosols in China
| Project/Area Number |
18310007
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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 | The University of Tokyo |
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Principal Investigator |
KOIKE Makoto The University of Tokyo, Graduate School of Science, Associate Professor (00225343)
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| Co-Investigator(Kenkyū-buntansha) |
TAKEGAWA Nobuyki The University of Tokyo, Research Center for Advanced Science and Technology, Associate Professor (00324369)
MIYAZAKI Yuzo The University of Tokyo, Research Center for Advanced Science and Technology, Research Associate (60376655)
KITA Kazuyuki Ibaraki University, Faculty of Science, Associate Professor (30221914)
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| Project Period (FY) |
2006 – 2007
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| Keywords | aerosol / black carbon / soot / China / Beijing / PRD / radiative forcing / climate change |
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| Research Abstract |
Recent rapid growth of industrial activities in East Asia has been causing large increase in aerosols in this area. Atmospheric aerosols modify the radiation budget through scattering and absorption. Because black carbon (BC) aerosols (e.g., soot) efficiently absorb the solar radiation, they have been recognized one of the most important aerosol compounds the solar radiation, they have been recognized one of the mot important aerosol compounds for climate change.
In the physical year of 2006, measurements of BC mass concentrations, size distribution, and mixing sate were in the Beijing region and Peal River Delta (PRD) region in China with Peking University Research Groups and some other international research groups. Aerosol chemical composition and some other parameters were also simultaneously measured.
In the physical year of 2007, these data were precisely analyzed and interpreted from the viewpoint of emission sources, chemical production, transport processes, and removal processes using three-dimensional chemistry transport model. Observations show that BC concentrations in Beijing have a clear diurnal variation with a maximum during night. This feature was well reproduced by model calculations through diurnal variations, such as that in the boundary layer height. Although large day-to-day variations were found for secondary aerosols, such as inorganic aerosols, they were small for BC. Model calculations showed that BC concentrations were generally controlled by BC emissions within 100 km around Beijing within previous 24 hours. On the centrally, emissions as far as 500 km within previous 3 days were found to affect concentrations of secondary aerosols, such as sulfate through accumulations under stable synoptic-scale meteorological conditions.
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Research Products
(28 results)
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[Journal Article] Urban photochemistry in central Tokyo : 1. Observed and modeled OH and H02 radical concentrations during the winter and summer of 20042007
Author(s)
Kanaya, Y., R. Cao, H. Akimoto, M. Fukuda, Y. Komazaki, Y. Yokouchi, M. Koike, H. Tanimoto, N. Takegawa, Y. Kondo
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Journal Title
J. Geophys. Res doi : 10. 1029/2007JD008670 112
Pages: D21312
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Seasonal variation of atmospheric C2-C7 nonmethane hydrocarbons in Tokyo2007
Author(s)
Shirai, T., Y. Yokouchi, D. R. Blake, K. Kita, K. Izumi, M. Koike, Y. Komazaki, Y. Miyazaki, M. Fukuda, Y. Kondo
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Journal Title
I Geophys. Res doi : 10.1029/2006JD008163 112
Pages: D24305
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Measurements of Reactive Nitrogen Produced by Tropical Thunderstorms during BIBLE-C2007
Author(s)
Koike, M., Y. Kondo, K. Kita, N. Takegawa, N. Nishi, B. Liley, T. Kashihara, S. Kudoh, S. Kawakami, D. Blake, T. Shirai, M. Ko, Y. Miyazaki, Z. Kawasaki, T. Ogawa
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Journal Title
I Geophys. Res. doi : 10.1029/2006JD008193 112
Pages: D18304
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Evolution of mixing state of black carbon particles : Aircraft asurements over the western Pacific in March 20042007
Author(s)
Moteki, N., Y. Kondo, Y. Miyazaki, N. Takegawa, T. Miyakawa, Y. Komazaki, G. Kurata, T. Shirai, D. R. Blake, M. Koik
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Journal Title
Geophys. Res. Lett. 10.1029/2006GL028943 34
Pages: L11803
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Nitric acid condensation on ice : 2. Kinetic limitations, a possible "cloud clock" for determining cloud parcel lifetime2007
Author(s)
Gamblin, B., O. B. Toon, M.A. Tolbert, Y. Kondo, N. Takegawa, H. Irie, M. Koike, P. K. Hudson, J.0. Ballenthin, D. E. Hunton, T. M. Miller, A.A. Viggiano, B. E. Anderson, M. Avery, G. W. Sachse, K. Guenther, C. Sorenson, M. J. Mahoney
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Journal Title
J. Geophys. Res. doi : 10.1029/2005JD006049 112
Pages: D12209
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Nitric acid condensation on ice : 1. Non-HN03 constituent of NOY condensing cirrus particles on upper tropospheric2006
Author(s)
Gamblin, B., O. B. Toon, M.A. Tolbert, Y. Kondo, N. Takegawa, H. Irie, M. Koike, J. O. Ballenthin, D. E. Hunton, T. M. Miller, A.A. Viggiano, B. E. Anderson, M. Avery, G. W. Sachse, J. R. Podolske, K. Guenther, C. Sorenson, M. J. Mahoney
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Journal Title
I Geophys. Res. doi : 10.1029/2005JD006048 111
Pages: D21203
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Temporal variations of elemental carbon in Tokyo2006
Author(s)
Kondo, Y., Y. Komazaki, Y. Miyazaki, N. Moteki, N. Takegawa, M. Nogami, S. Deguchi, M. Fukuda, T. Miyakawa, Y. Morino, D. Kodama, M. Koike
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Journal Title
J. Geophys. Res. doi : 10.1029/2005JD006257 111
Pages: D12205
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Evolution of submicron organic aerosol in polluted air exported from Tokyo2006
Author(s)
Takegawa, N., T. Miyakawa, Y. Kondo, D. R. Blake, Y. Kanaya, M. Koike, M. Fukuda, Y. Komazaki, Y. Miyazaki, A. Shimono, T. Takeuchi
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Journal Title
Geophys. Res. Lett. doi : 10.1029/2006GL025815 33
Pages: L15814
Description
「研究成果報告書概要(欧文)」より
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