Chaotic analyses of 3D Lagrangian motions in the rotating annulus experiments.

旋转环实验中 3D 拉格朗日运动的混沌分析。

基本信息

  • 批准号:
    11640435
  • 负责人:
  • 金额:
    $ 1.73万
  • 依托单位:
  • 依托单位国家:
    日本
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
  • 财政年份:
    1999
  • 资助国家:
    日本
  • 起止时间:
    1999 至 2000
  • 项目状态:
    已结题

项目摘要

The purpose of this project is to experimentally study the chaotic phenomena of the atmosphere by carrying out long-term tracking of 3D Lagrangian motions of an air parcel in the rotating annulus experiments. For steady baroclinic waves, we have already completed the experiments and analyses that showed good agreement to the chaotic analyses based on the numerical simulations done by Sugata and Yoden (1994)(Tajima et al, J.Meteor, Soc.Japan, 1999). Here we conveyed the experiments on Hadley flows with the tracking of more than 200 hours. As a result, we could confirm the theoretical result obtained by Robinson (1959) and the numerical analyses done by Williams (1967)(Tajima et al, J.Atmos.Sci., 2000). The subjects for whose studies a Lagrangian view plays an especially important role have been known to be the motions of the air in the stratosphere that transports stratospheric substances such as ozone from the equator to poles and around the polar vortex. In the rotating annulus fluid … More experiments, so far a radial temperature difference has been imposed on the whole depth of the water in the tank to produce Rossby waves which simulate mid-latitude tropospheric waves. Here we succeeded in producing the wave flows in an unstable lower later and axisymmetric flows in a stable stratified upper layer by imposing only near the bottom of the tank and heating the water surface. At first we tried to simulate the upward propagation of the drifting waves that correspond to the tropospheric ones seen in the Southern Hemisphere. Then we introduced the conical bottom to model the beta effect and conducted the experiments on wavenumbers 5, 4 and 3. As a result, only the smaller wavenumber-3 flows were found to distinctively propagate. In the summer hemisphere, all the tropospheric waves are known to be prohibited from propagating. Furthermore, we could confirm the experimental evidence that simulates this fact. In the experiments to simulate the upward propagation of standing waves that corresponds the tropospheric ones produced by the large-scale topographies in the Northern Hemisphere, we found the upward propagation only in wavenumber 2. But we observed some symptom to tell that the waves were not steady so that we would need to carry out these experiments again to confirm the result. We have submitted the paper that describes the results of this project to Journal of Atmospheric Sciences. Less
该项目的目的是通过在旋转环带实验中对气团的 3D 拉格朗日运动进行长期跟踪来实验研究大气的混沌现象。对于稳定斜斜波,我们已经完成了实验和分析,结果与基于 Sugata 和 Yoden (1994) 所做的数值模拟的混沌分析具有良好的一致性(Tajima et al, J.Meteor, Soc.Japan, 1999)。这里我们传达了哈德利流的实验,跟踪了200多个小时。结果,我们可以证实Robinson(1959)获得的理论结果和Williams(1967)所做的数值分析(Tajima et al, J.Atmos.Sci., 2000)。众所周知,拉格朗日观点在研究中发挥着特别重要作用的主题是平流层中空气的运动,这些空气将平流层物质(例如臭氧)从赤道输送到两极和极地涡旋周围。在旋转环空流体实验中,到目前为止,已经对水箱中整个水深度施加了径向温差,以产生模拟中纬度对流层波的罗斯贝波。在这里,我们通过仅在水箱底部附近施加并加热水面,成功地在不稳定的下层中产生了波浪流,并在稳定的分层上层中产生了轴对称流。首先,我们尝试模拟与南半球对流层中所见相对应的漂移波的向上传播。然后我们引入锥底来模拟贝塔效应,并对波数5、4和3进行了实验。结果,只有较小的波数3流被发现有明显的传播。在夏半球,所有对流层波都被禁止传播。此外,我们可以证实模拟这一事实的实验证据。在模拟北半球大尺度地形产生的对流层驻波向上传播的实验中,我们只发现波数为2的驻波有向上传播。但我们观察到一些现象表明驻波不稳定,因此我们需要再次进行这些实验来证实结果。我们已向《大气科学杂志》提交了描述该项目结果的论文。较少的

项目成果

期刊论文数量(2)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Toshihiko Tajima, Toshiro Nakamura: "Experimental Observations of 3-D Lagrangian Motion in Steady Baroclinic Waves-II"Journal of Meteorological Society Japan. 77. 17-29 (1999)
Toshihiko Tajima、Toshiro Nakamura:“稳定斜压波中 3-D 拉格朗日运动的实验观测 - II”日本气象学会杂志。
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    0
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  • 通讯作者:
Toshihiko Tajima: "Experimental Observations of 3-D Lagrangian Motions in steady Baroclinic Waves-ll"Journal of Meteorological Society Japan. 77・1. 17-29 (1999)
田岛俊彦:“稳定斜压波中 3-D 拉格朗日运动的实验观测”,日本气象学会杂志 77・1(1999 年)。
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  • 影响因子:
    0
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TAJIMA Toshihiko其他文献

TAJIMA Toshihiko的其他文献

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{{ truncateString('TAJIMA Toshihiko', 18)}}的其他基金

Rotating annulus experiments to study the beta-effect in atmospheric dynamics
旋转环空实验研究大气动力学中的贝塔效应
  • 批准号:
    18540435
  • 财政年份:
    2006
  • 资助金额:
    $ 1.73万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
Rotating annulus experiments to simulate the air motion in the stratified layer
旋转环空实验模拟分层层中的空气运动
  • 批准号:
    15540425
  • 财政年份:
    2003
  • 资助金额:
    $ 1.73万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
Rotating annulus experiments to simulate the air motion in the stratified layer
旋转环空实验模拟分层层中的空气运动
  • 批准号:
    13640442
  • 财政年份:
    2001
  • 资助金额:
    $ 1.73万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
Laboratory simulations of atmospheric dynamics in the rotating fluid annulus experiments.
旋转流体环空实验中大气动力学的实验室模拟。
  • 批准号:
    07640582
  • 财政年份:
    1995
  • 资助金额:
    $ 1.73万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
Multiple liquid crystal techniques of visualization for 3-D measurements in the rotating annulus experiments
旋转环实验中 3D 测量的多种液晶可视化技术
  • 批准号:
    04559012
  • 财政年份:
    1992
  • 资助金额:
    $ 1.73万
  • 项目类别:
    Grant-in-Aid for Developmental Scientific Research (B)
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