2007 Fiscal Year Final Research Report Summary
A comprehensive research on whole process of wind erosion from arid region coupling with observation, theory, and modeling.
| Project/Area Number |
17201008
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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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 |
MIKAMI Masao Japan, Meteorological Research Institute, Physical Met. Res. Division, 2nd Research Labo, Head of 2nd Research Labo. (60354510)
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| Co-Investigator(Kenkyū-buntansha) |
NAGASIMA Hideki Rissyo Univ., Dept. of Geo-Environmental Science, Part-time Instructor (10087570)
ISHIZUKA Masahide Kagawa Univ., Dept. of Engineering, Associate Professor (50324992)
YAMADA Yutaka RIKEN, Advanced Tech. Support Division, Senior technical Scientist (70392165)
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| Project Period (FY) |
2005 – 2007
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| Keywords | dust / yellow sand / wind erosion / threshold friction velocity / soil moisture |
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| Research Abstract |
For understanding wind erosion process, we have made an intensive observation (IOP) in Australia Using this data, we compared and validated a heterogeneous saltation theory and made a quantitative discussion about saltation flux, including its size distribution and vertical profile, threshold friction velocity, and relation to soil surface moisture and soil structure. We also conducted a comparison experiment with newly developed sand particle counter and Sensit.
Intensive observation was conducted on the fallow wheat field at southeastern part of Australia during period 23 Feb. to 13 march in 2006. We have monitored 12 dust event during IOP and results were summarized as follows;
1) Saltation flux and its time variation, size distribution, and vertical structure were obtained. During IOP, one big event and 11 small events occurred and one big event amount for the most part of the total saltation flux during IOP.
2) The size distribution of saltation shows 2-peaks, one is coarse mode with
… More
maximum at 200 micron meters and the other with maximum of 80 micron meters. This confirmed the presence of two phase of saltation mode that shads heterogeneous saltation theory predicted. The finer mode is due to exponential profile of fine sand particle and the coarser mode is due to logarithmic profile of coarse sand particle.
3) We can determined saltation threshold friction velocity with objective analysis of SPC data. The results show that the size dependence of threshold friction velocity is not found.
4) We have monitored the suppression of dust emission flux due to formation of weak crust at the ground surface formed by weak precipitation.
5) We have compared saltation fluxes measured by SPC and Sensit under different wind speed in the field type wind tunnel The SPC indicate good linearity with increase of wind speed. On the other hand, Sensit data shws decrease of flux with increase of wind speed when wind speed is high. This will be due to the coincident loss of collision signal when the particle number which collide with Sensit, exceed some limit value. For this, SPC will be more available for monitoring strong dust event. Less
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[Journal Article] Aeolian Dust Experiment on Climate Impact : An Overview of Japan-China Joint Project ADEC2006
Author(s)
Mikami, M., G-Y. Shi, I. Uno, S. Yabuki, Y. Iwasaka, M. Yasui, Te. Aoki, T.Y. Tanaka, Y. Kurosaki, K. Masuda, A. Uchiyama, A. Matsuki, T. Sakai. T. Takemi, M. Nakawo, N. Seino, M. Ishizuka, S. Satake, K. Fujita, Y. Hara, K. Kai, S. Kanayama, M. Hayashi, M. Du, Y. Kanai, Y. Yamada, X. -Y. Zhang, Z. Shen, H. Zhou, O. Abe, T. Nagai, Y. Tsutsumi, M. Chiba, and J. Suzuki
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Journal Title
Global Planetary Change 52, do I : 10.1016/j.gloplacha.2006.03.001
Pages: 142-172
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Observation of number size distribution of desert aerosols in the south of the Taklimakan Desert,China2005
Author(s)
Mikami,M.,Aoki,Te.,Ishizuka,M.,Yabuki,S.,Yamada,Y.,Gao,W.,and F.J.Zeng
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Journal Title
Journal of the Meteorological Society of Japan 83A
Pages: 31-43
Description
「研究成果報告書概要(和文)」より
Peer Reviewed
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[Journal Article] Measurement of saltation process over gobi and sand dunes in the Taklimakan desert,China,with newly developed sand particle counter2005
Author(s)
Mikami,M.,Yamada,Y.,Ishizuka,M.,Ishimaru,T.,Gao,W.,and F.J.Zeng
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Journal Title
Journal of Geophysical Research 110
Pages: doi:10.1029/2004JD004688
Description
「研究成果報告書概要(和文)」より
Peer Reviewed
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[Journal Article] Zeng, Measurement of saltation process over gobi and sand dunes in the Taklimakan desert, China, with newly developed sand particle counter2005
Author(s)
Mikami, M. Yamada, Y. Ishizuka, M. Ishimaru, T. Gao, W. F. J.
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Journal Title
Journal of Geophysical Research -Atmosphere s- Vol.110, D18S02, doi : 10.1029/2004JD0046, 88
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Heidenreich, Effect of weak crust on saltation mass flux after small precipitation event during JADE IOP2007
Author(s)
Ishizuka, M. Mikami, M. Leys, J. Yamada, Y., S.
Organizer
Proceedings of Iugg XXIV General Assembly, (M) -IAMAS, Mineral Dust Cycle and its Impact on Clouds and Radiation(ICCp)
Place of Presentation
(poster presentation on 9 by M. Ishizuka), University of Perugia, Italy
Year and Date
20070702-13
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Heidenreich, Multi-size Saltation Process from Fallow-Wheat-Field in Australia during JADE IOP2007
Author(s)
Mikami, M. Leys, J. Ishizuka, M. Yamada, Y., S.
Organizer
Proceedings of IUGG XXIV General Assembly, (M) -IAMAS, MS004 : Mineral Dust Cycle and its Impact on Clouds and Radiation(ICCP)
Place of Presentation
(poster presentation on 9 by M. Mikami), University of Perugia, Italy
Year and Date
20070702-13
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Effect of weak crust on saltation mass flux after small precipitation event during JADE IOP2007
Author(s)
Ishizuka,M.,Mikami,M.,Leys,J.,Yamada,Y.,and S.Heidenreich
Organizer
IUGG XXIV General Assembly,(M)-IAMAS,MS004
Place of Presentation
Perugia,Italy
Year and Date
2007-07-09
Description
「研究成果報告書概要(和文)」より
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[Presentation] Multi-size Saltation Process from Fallow-Wheat-Field in Australia during JADE IOP2007
Author(s)
Mikami,M.,Leys,J.,Ishizuka,M.,Yamada,Y.,and S.Heidenreich
Organizer
IUGG XXIV General Assembly,(M)-IAMAS,MS004
Place of Presentation
Perugia,Italy
Year and Date
2007-07-09
Description
「研究成果報告書概要(和文)」より
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[Presentation] Wind erosion process from anthropogenic source areas-a preliminary result of JADE IOP12006
Author(s)
Mikami,M.,Leys,J.,Heidenreich,S.,Shao,Y.,Ishizuka,M.,and Y.Yamada
Organizer
Sixth International Conference on Aeolian Research
Place of Presentation
Guelph,Canada
Year and Date
2006-07-27
Description
「研究成果報告書概要(和文)」より
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[Presentation] Wind erosion process observed at the Taklimakan Desert,China,during ADEC IOP1 to IOP32006
Author(s)
Mikami,M.,Shi,G.Y.,Ishizuka,M.,Yamada,Y.,and F.J.Zeng
Organizer
Sixth International Conference on Aeolian Research
Place of Presentation
Guelph,Canada
Year and Date
2006-07-27
Description
「研究成果報告書概要(和文)」より
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[Presentation] Effect of soil water on saltation process observed in China and Australia2006
Author(s)
Ishizuka,M.,Mikami,M.,Zeng,F.-J.,Leys,J.,Yamada,Y.,and S.Heidenreich
Organizer
Sixth International Conference on Aeolian Research
Place of Presentation
Guelph,Canada
Year and Date
2006-07-24
Description
「研究成果報告書概要(和文)」より
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[Presentation] Multi-size saltation for different soil moisture conditions at a gobi site in the Taklimakan Desert,China2005
Author(s)
Ishizuka,M.,Mikami,M.,Yamada,Y.,Zeng,F.,and W.Gao
Organizer
2005 AGU Fall Meeting
Place of Presentation
San Francisco,USA
Year and Date
2005-12-06
Description
「研究成果報告書概要(和文)」より
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[Presentation] An Introduction to Japanese Australian Dust Experiment-JADE2005
Author(s)
Mikami,M.,Leys,J.,Shao,Y.,McTainsh,G.,Ishizuka,M.,Yamada,Y.,and H.Nagasima
Organizer
2005 AGU Fall Meeting
Place of Presentation
San Francisco,USA
Year and Date
2005-12-06
Description
「研究成果報告書概要(和文)」より
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[Presentation] Number concentration of desert aerosols in the south of the Taklimakan Desert,China2005
Author(s)
Mikami,M.,Aoki,Te.,Ishizuka,M.,Yabuki,S.,Yamada,Y.,Gao,W.,and F.J.Zeng
Organizer
AOGS(Asia Oceania Geosciences Society)1st Annual Meeting
Place of Presentation
Singapore
Year and Date
2005-06-20
Description
「研究成果報告書概要(和文)」より
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