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symmetry instability
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  对称不稳定
     (2) The first kind of rainstorm is related to symmetry instability(SI), the second to convective stability(CI), and there was heavier rainfall in these two kinds of rainstorm.
     (2)第一类暴雨与对称不稳定有关,第二类暴雨与对流不稳定有关,这两类暴雨雨量较大;
短句来源
     The Symmetry Instability of the Thermal Wind Non-Equilibrium Basic Flow and its Dynamical Diagnosis in the Vortex Atmosphere
     非热成风平衡基流的对称不稳定及在涡旋大气中的动力诊断
短句来源
     Then, the symmetry instability of a hurricane with this criterion is diagnosed, and the results show that the symmetry instability may serve as the mechanism for the development of the slantwise updraft in the eyewall.
     同时根据推导出的判据 ,利用高分辨率的模式输出资料 ,对一次飓风过程作了对称不稳定的动力诊断 ,发现对称不稳定是飓风眼壁中深厚倾斜上升运动产生的可能机制。
短句来源
     (2)In this rain process, the instability stratification in South is higher than that in North, and there are symmetry instability and convection instability simultaneously.
     (2)此次降雨的不稳定层结有南高北低现象,同时有对称不稳定和对流不稳定存在;
短句来源
     By using symmetry instability criterion,an unusual storm smow appeared on January 6 to 7,2001 in Shandong Province is analysed,the results show that the storm snow occurred in the symmetry instability atmosphere,low-level jet caused warm and humid air converging and ascending in lower troposphere and stimulated the symmetry instability energy releasing and then the event of storm snowfall occurred.
     采用对称不稳定判据 ,对发生在 2 0 0 1年 1月 6~ 7日的一次罕见的山东暴雪天气过程进行了分析 ,结果表明 :暴雪产生在对称不稳定大气中 ,低空急流促使对流层低层暖湿气流辐合上升 ,触发对称不稳定能量释放 ,产生暴雪天气。
短句来源
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  “symmetry instability”译为未确定词的双语例句
     Study of the symmetry instability in an autumn Rainstorm Process
     一次秋季特大暴雨过程对称不稳定性的研究
     3) Thunderstorm and negative symmetry instability area are coincided. The symmetry instability induced tilting convection. 4) The thunderstorm area is located not only between upper jet stream(300hPa) and low level jet(850hPa), but between easterly jet stream and westerly jet stream in 850hPa.
     雷暴区位于300hPa高空急流与850hPa低空急流轴之间,在850hPa上又位于偏东风急流与西南风急流之间;
短句来源
     The establishment of convective instability and conditional symmetry instability,and the centralized release of convective available potential energy(CAPE) are important conditions of the occurrence and development in this rainstorm.
     对流不稳定和条件对称不稳定的建立以及对流有效位能的集中释放是此次特大暴雨产生和持续发展的重要条件。
短句来源
     MPV < 0is abundant essential condition that the atmosphere exists symmetry instability.
     湿位涡MPV<0是大气发生条件性对称不稳定的充分必要条件。
  相似匹配句对
     Study of the symmetry instability in an autumn Rainstorm Process
     一次秋季特大暴雨过程对称不稳定性的研究
     Methods: The Symmetry(?)
     方法:Symmetry(?)
短句来源
     Symmetry and Group
     对称与群
短句来源
     Interfacial Instability
     界面不稳定现象
短句来源
     Conditional symmetry instability and convective instability play important role on the rainstorm.
     条件性对称不稳定以及对流不稳定对此次暴雨过程也起了关键的作用。
短句来源
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In this paper, the relations between the richardson number and the stability of meso and, small-scale perturbations in the atmosphere are discussed by small parameter methods with non-static equilibrium. The criterions of the symmetry instability under the conditions of zero order and first order are

本文采用非静力平衡模式,使用摄动方法研究了里查逊数与中小尺度扰动的稳定性的关系。在零级近似和一级近似下,对称不稳定判据依次为RiF;在零级近似下斜压不稳定判据为Ri<-_(k2)~8

Using and filtering the routine meteorological data, the features of convective storm rainfall occurred in a Jiang-Huai cyclonic during 24, June 1980 are analysed. The results showed that there are many conditions for development of the rainstorm:1) The coincidences of the low level jet stream axis and the moisture tongue are adventageous to continuously transporting of the vapour.2) There are long time convective instability between 850 and 700hPa.3) Thunderstorm and negative symmetry instability area...

Using and filtering the routine meteorological data, the features of convective storm rainfall occurred in a Jiang-Huai cyclonic during 24, June 1980 are analysed. The results showed that there are many conditions for development of the rainstorm:1) The coincidences of the low level jet stream axis and the moisture tongue are adventageous to continuously transporting of the vapour.2) There are long time convective instability between 850 and 700hPa.3) Thunderstorm and negative symmetry instability area are coincided. The symmetry instability induced tilting convection.4) The thunderstorm area is located not only between upper jet stream(300hPa) and low level jet(850hPa), but between easterly jet stream and westerly jet stream in 850hPa.5)There are mesoscale low level convergence and high level divergence in the thunderstorm area.In short, the larger and mesoscale, ascending motion and vapour transport as well as instability are favourable for thunderstorm development.

本文利用常规观测资料,并采用滤波方法,仔细地分析了1980年6月24目一次江淮气旋中发生的强对流性质的暴雨天气.分析表明,强对流性质的暴雨天气之所以发生,是由于低层的西南风急流轴与Td的湿舌轴重合,极有利于水汽的不断输送,850-700hPa之间较长时间有对流不稳定层存在,雷暴区又正好与S<0的对称不稳定区重合,对称不稳定产生了倾斜对流,使雷暴天气得以维持;雷暴区位于300hPa高空急流与850hPa低空急流轴之间,在850hPa上又位于偏东风急流与西南风急流之间;同时又存在明显的低层辐合高层辐散的中尺度流场。总之,大、中尺度的上升运动、水汽输送、稳定度方面都十分有利于雷暴的产生。

In this paper, a modified symmetry instability criterion for thermal wind non equilibrium basic flow is deduced by using two dimensional liner equations with Boussinesq approximation of moist air. It is found that the thermal wind non equilibrium of the basic flow is favourable for the development of symmetry instability under certain conditions. Then, the symmetry instability of a hurricane with this criterion is diagnosed, and the results show that the symmetry instability may serve...

In this paper, a modified symmetry instability criterion for thermal wind non equilibrium basic flow is deduced by using two dimensional liner equations with Boussinesq approximation of moist air. It is found that the thermal wind non equilibrium of the basic flow is favourable for the development of symmetry instability under certain conditions. Then, the symmetry instability of a hurricane with this criterion is diagnosed, and the results show that the symmetry instability may serve as the mechanism for the development of the slantwise updraft in the eyewall.

从湿大气的绝热、无粘、包辛内斯克近似的二维线性化方程组出发 ,考虑基本气流热成风不平衡 ,在经典的对称不稳定理论基础上推导出修正了的对称不稳定判据 ,发现基流热成风不平衡在一定条件下有利于对称不稳定发展。同时根据推导出的判据 ,利用高分辨率的模式输出资料 ,对一次飓风过程作了对称不稳定的动力诊断 ,发现对称不稳定是飓风眼壁中深厚倾斜上升运动产生的可能机制。

 
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