2007 Fiscal Year Final Research Report Summary
Theoretical and numerical study on Jovian atmospheres:their dynamics, matetialtrensport, and energetics.
| Project/Area Number |
16204036
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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 |
Meteorology/Physical oceanography/Hydrology
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| Research Institution | Kobe University (2007)
Hokkaido University (2004-2006) |
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Principal Investigator |
HAYASHI Yoshi-yuki Kobe University, Faculty of Science, Professor (20180979)
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| Co-Investigator(Kenkyū-buntansha) |
WATANABE Shigeto Hokkaido University, Faculty of Science, Professor (90271577)
KURAMOTO Kiyoshi Hokkaido University, Faculty of Science, Professor (50311519)
ISHIWATARI Masaki Hokkaido University, Faculty of Science, Associate Professor (90271692)
ODAKA Masatsugu Hokkaido University, Faculty of Science, Assistant Professor (60344462)
NAKAJIMA Kensuke Kyushu University, Faculty of Sciences, Assistant Professor (10192668)
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| Project Period (FY) |
2004 – 2007
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| Keywords | Jupiter / moist convection / structure of cloud / non-hydrostatic convection model / spherical shell convection model / equatorial zonal flow / turbulence / atmospheric general circulation model |
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| Research Abstract |
For the purpose of investigating the interplay among dynamical, thermal, and compositional structures of the atmospheres of Jovian planets, we compiled the current status of corresponding knowledge, developed a hierarchical modeling system, and conducted numerical experiments with those hierardical modeling systems. The main findings of our investigations are summarized as follows:
1. We developed a vertical one-dimensional equilibrium cloud condensation model, which enable us to cover possible atmospheric compositional varieties of the Jovian planets. We found that the contributions to the intensity of stability by the cloud layers associated with the condensation of NH_3 and formation of NH_4SH are not negligible compared with that of H_2O.
2. We developed a two-dimensional cloud convection model incorporating the condensation of NH_3 and H_2O and formation of NH_4SH. We conducted a series of numerical experiments, and found that the H_2O condensation level acts as a distinct dynamical
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boundary that separates the convective motions above and below it. The stable layers due to NH_3 and NH_4SH clouds cannot suppress the cloudy plumes driven by H_2O condensation healing, resulting in the mixing over the full depth of the atmosphere above the H_2O condensation level.
3. With the application to the Jovian atmosphere in mind, we performed a series of numerical studies on the equatorial acceleration using the three dimensional Bousinesq spherical shell convection model. We found that a strong stable layer in the outer layer helps the development of equatorial retrograde jet. This result may raise a question about the theory where rotating spherical thermal convection explains the cause of the equatorial westerly jets of Jupiter and Saturn.
4. A common software infrastructure, over which those numerical models were constructed, was developed. It contains "gt4f90io" which is a library for I/O of numerical data, and "Rdoc" which is an automatic documentation generator for numerical model codes. We also organized a standard style of Fortran90 programming and constructed a library of Fortran90 functions for basic mathematical manipulations, with which we developed 'Spmodel" which is a set of spectral models. All of the softwares mentioned are open to public on our web site. Less
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Research Products
(40 results)
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[Journal Article] Rossby waves and jets in a two-dimensional decaying turbulence on arotating sphere.2007
Author(s)
Hayashi, Y. -Y., Nishizawa, S., Takehiro, S., Yamada, M., Ishioka, K., Yoden, S.
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Journal Title
J. Atmos. Sci. 64
Pages: 4246-4269
Description
「研究成果報告書概要(和文)」より
Peer Reviewed
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[Journal Article] Rossby waves and jets in a two-dimensional decaying turbulence on a rotating sphere2007
Author(s)
Hayashi, Y.-Y, Nishizawa, S., Takehiro, S., Yamada, M., Ishioka, K., Yoden, S
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Journal Title
J. Atmos. Sci 64
Pages: 4246-4269
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] SPMODEL: A Series of hierarchical spectral models for geophyiscal fluid dynamics2006
Author(s)
Takehiro, S., Odaka, M., Ishioka, K., Ishiwatari, M., Hayashi, Y. -Y., SPMODEL Development Group
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Journal Title
Nagare Multimedia
Pages: Web
Description
「研究成果報告書概要(和文)」より
Peer Reviewed
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[Journal Article] SPMODEL Development Group, "SPMODEL: A series of hierarchical Spectral models for geophysical fluid dynamics"2006
Author(s)
Takehiro, S., Odaka, M., Ishioka, K., Ishiwatari, M., Hayashi, Y.-Y
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Journal Title
Description
「研究成果報告書概要(欧文)」より
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[Presentation] A numerical experiment of a moist planet as an idealization of Jovian atmosphere with a general circulation model2007
Author(s)
Morikawa, Y., Sugiyama, K., Takahashi, Y.-O., Odaka, M., Ishiwatari, M., Nakajima,K., Hayashi, Y.-Y
Organizer
2007 Fall meeting of the Japanese Society for Planetary Sciences
Place of Presentation
Kochi, Japan
Year and Date
2007-09-27
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Monitoring of Atmospheric Dynamics by Jupiter Orbiter2007
Author(s)
Takahashi, Y., Nakajima, K., Sakanoi, T., Sugiyama, K., Takeuchi, S., Imamura, T., Satoh, T.
Organizer
Asia Oceania Geosciences Society(AOGS)
Place of Presentation
Bangkok, Thailand
Year and Date
2007-08-04
Description
「研究成果報告書概要(和文)」より
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[Presentation] Monitoring of atmospheric dynamics by Jupiter Orbiter2007
Author(s)
Takahashi, Y., Nakajima, K., Sakanoi, T., Sugiyama, K., Takeuchi, S., Imamma, T., Satoh, T
Organizer
2007 Meeting of Asia Oceania Geosciences Society(AOGS)
Place of Presentation
Bankok, Thailand
Year and Date
2007-08-04
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Design and implementation test of a general circulation model with flexible and readable code: design of physical process module2007
Author(s)
Morikawa,Y., Ishiwatari,M, Takahashi, Y.-O-, Odaka, M., Hayashi, Y.-Y
Organizer
Japan Geoscience Union Meeting 2007
Place of Presentation
Chiba, Japan
Year and Date
2007-05-20
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Numerical modeling of moist convection in Jupiter's atmosphere with H2O, NH3, and NH4SH clouds2006
Author(s)
Sugiyama, K., Odaka, M., Nakajima, K., Hayashi, Y.-Y.
Organizer
38th Meeting of the AAS Division for Planetary Sciences
Place of Presentation
Pasadena, California, USA
Year and Date
2006-10-09
Description
「研究成果報告書概要(和文)」より
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[Presentation] Numerical modeling of moist convection in Jupiter's atmosphere with H2O, NH3, and NH4SH clouds2006
Author(s)
Sugiyama, K., Odaka, M., Nakajima, K., Hayashi, Y.-Y
Organizer
38th Meeting of the Division of Planetary Sciences, American Astronomical Society
Place of Presentation
Pasadena California, USA
Year and Date
2006-10-09
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Rossby waves and acceleration-deceleration of jets on a sphere or in a spherical shell2006
Author(s)
Hayashi, Y.-Y, Yamada, M., Takehiro, S., Yoden, S., Ishioka, K
Organizer
Chapman Conference on Jets and Annular Structures in Geophysical Fluid
Place of Presentation
Savannah, Georgia, USA
Year and Date
2006-06-10
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Rossby waves and acceleration-deceleration of jets on a sphere or in asphelrical shell2006
Author(s)
Hayashi, Y.-Y., Yamada, M., Takehiro, S., Yoden, S., Ishioka, K.
Organizer
Chapman Conference on Jets and Annular Strucutres in Geophysical Fluid
Place of Presentation
Savannah, Georgia, USA
Year and Date
2006-01-12
Description
「研究成果報告書概要(和文)」より
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