Theoretical and numerical study on Jovian atmospheres:their dynamics, matetialtrensport, and energetics.

木星大气的理论和数值研究：它们的动力学、物质运动和能量学。

基本信息

批准号：
16204036
负责人：
HAYASHI Yoshi-yuki
金额：
$ 29.37万
依托单位：
Kobe University (2007)Hokkaido University (2004-2006)
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A)
财政年份：
2004
资助国家：
日本
起止时间：
2004 至 2007
项目状态：
已结题

项目摘要

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 … More 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

为了解释Jovian行星的动态，热和组成结构，他的当前状态，发展了分层建模系统，并与这些层次进行了数值实验。：1。我们开发了一个垂直的一维平衡云式模型，涵盖了可能的大气组成粒子行星。 2。 H_2O抑制作用的羽毛，在H_2O当代水平的完整深度上重新占用。3。稳定层有助于赤道喷气机的发展。 “ RDOC”的“数值”模型代码也组织了fortran90编程的标准样式，并构建了用于基本数学操作的fortran90功能