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自由大气层
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  “自由大气层”译为未确定词的双语例句
     With the evolution of rain season, the range in which wind direction is complicated expends from boundary layer to free atmosphere.
     随着雨季进程,风向的复杂程度由近地层向大气边界层以上的自由大气层扩展。
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     In this paper,basic concepts of atmospheric optical turbulence,model of surface layer,boundary layer and free atmosphere,methods for profiling,and domestic and foreign research results in this field are introduced.
     本文介绍了大气光学湍流的描述方法,近地面层、边界层和自由大气层光学湍流模式,大气光学湍流廓线的测量方法,以及国内外在该领域研究的重要成果.
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     The outer scale is estimated by Tatarski formula.
     运用Tatarskii公式计算了高空湍流外尺度,分析了边界层湍流和自由大气层湍流特征。
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  相似匹配句对
     Freedom
     自由
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     freedom;
     自由 ;
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     Atmosphere and Climate
     大气层和气候
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The characteristic wind fields of shear--line can occur not only along the thermal frontal zones, but also along the narrow and deep zones with intensively convective heating in the background of weak large--scale wind field in summer subtropics. The structure of the latter is equivalentbarotropical (abbreviated as EBtSL in this paper). The extraordinarily strong release of latent heat (and precipitation) can be continuously tolerated in EBtSL. The development equation and the secondary circulation equation...

The characteristic wind fields of shear--line can occur not only along the thermal frontal zones, but also along the narrow and deep zones with intensively convective heating in the background of weak large--scale wind field in summer subtropics. The structure of the latter is equivalentbarotropical (abbreviated as EBtSL in this paper). The extraordinarily strong release of latent heat (and precipitation) can be continuously tolerated in EBtSL. The development equation and the secondary circulation equation are given in this paper, and the basic dynamical characters of EBtSL are discussed.Having the aid of these results, a number of observational facts relevant to the typical EBtSL can be stringed logically together and explained theoretically. It is indicated that EBtSL, as a kind of dynamic structure, is especially favourable to the continuous unusual intense precipitation.

切变线风场除伴随温度锋区出现以外,也可以在夏季副热带大尺度弱环境风场中伴随狭窄、深厚的强对流加热带而出现。后者的结构是相当正压的(本文称为EBtSL)。除ROssby数R0=0(du/dt)/f0U以外,决定带状准二维运动系统性质的另一个重要参数是H=(CZ/f0l)2,EBtSL的特点是在跨带水平尺度l收缩的同时,铅直尺度Z(无量纲)并不随之收缩,因而H~10(斜压锋面,H≤1)。在这种情况下,即使非绝热加热率比温度平流大一个量级,且R0=10-1/2;O(|dva/dt|)=10-1/20(|dvg/dt|)已不符合经典的地转动量近似,但仍旧能够成为排除重力一惯性波的准平衡运动系统。变化的欧拉时间尺度仍取决于平流,即EBtSL能持续地容纳特大的潜热释放(和降水)。本文给出EBtSL的发展方程和次级环流方程,讨论了EBtSL的基本动力学性质。这些结果把关于典型EBtSL的一系列观测事实逻辑地联系起来,并给予理论解释,表明EBtSL是一种特别有利于持续大暴雨的动力学结构。典型的EBtSL是长江流域梅雨晚期自由大气层的切变线。其初生机制是低层干一湿气团界带紧南侧2θe/y2负值最大轴附近的带状CIS...

切变线风场除伴随温度锋区出现以外,也可以在夏季副热带大尺度弱环境风场中伴随狭窄、深厚的强对流加热带而出现。后者的结构是相当正压的(本文称为EBtSL)。除ROssby数R0=0(du/dt)/f0U以外,决定带状准二维运动系统性质的另一个重要参数是H=(CZ/f0l)2,EBtSL的特点是在跨带水平尺度l收缩的同时,铅直尺度Z(无量纲)并不随之收缩,因而H~10(斜压锋面,H≤1)。在这种情况下,即使非绝热加热率比温度平流大一个量级,且R0=10-1/2;O(|dva/dt|)=10-1/20(|dvg/dt|)已不符合经典的地转动量近似,但仍旧能够成为排除重力一惯性波的准平衡运动系统。变化的欧拉时间尺度仍取决于平流,即EBtSL能持续地容纳特大的潜热释放(和降水)。本文给出EBtSL的发展方程和次级环流方程,讨论了EBtSL的基本动力学性质。这些结果把关于典型EBtSL的一系列观测事实逻辑地联系起来,并给予理论解释,表明EBtSL是一种特别有利于持续大暴雨的动力学结构。典型的EBtSL是长江流域梅雨晚期自由大气层的切变线。其初生机制是低层干一湿气团界带紧南侧2θe/y2负值最大轴附近的带状CISK。自由大?

A ten-day continued extremely heaVy rain process with the especially steady Meiyu drculation patterns in early July 1991 is studied by both compositive analysis and representative daily casestudy. The synoptic model of warm shear-line type Meiyu front is further discussed. Anequivalentbarotropic shear line of upright structure and a banded quasitwo-dimensional motion field,which is different from the geostrophic momentum approximation one in free atmosphere are found. Ashallow slant-wise frontogenetic circulation...

A ten-day continued extremely heaVy rain process with the especially steady Meiyu drculation patterns in early July 1991 is studied by both compositive analysis and representative daily casestudy. The synoptic model of warm shear-line type Meiyu front is further discussed. Anequivalentbarotropic shear line of upright structure and a banded quasitwo-dimensional motion field,which is different from the geostrophic momentum approximation one in free atmosphere are found. Ashallow slant-wise frontogenetic circulation and the Ekman pumping to the south of the shear line inthe boundary layer are coupled with and interacting with the cumulus convective heating-driven upright circulation in the free atmosphere and result in the continuous heavy rain, The mechanism of genesis and recovery after the break of such a system is probably a kind of banded CISK,which is triggeredto the south of the low-level "moisture front" by the upper east travelling short-wave disturbance ofvery weak baroclinity in subtropics.

对在1991年7月上旬特别稳定的梅雨形势下持续10天的特大暴雨期作了合成和典型过程研究,并进一步探讨了暖切变型江淮梅雨锋天气系统模型。它在自由大气层表现为结构竖立的相当正压切变线和一种不同于经典地转动量近似的带状准二维运动场.边界层的浅层锋生倾斜环流以及偏于切变线轴以南的Ekman抽吸与自由大气层中基本上由积云对流加热驱动的竖直环流相互依存和耦合,造成持续的大暴雨。这种系统的初生和中断后复苏的机制可能是由斜压性极弱的副热带高空东移的短波扰动在低层“湿度锋”带紧南侧触发导致的一种带状CISK。

The spatial and temporal distributions and change characteristics of O_3 are studied by analysing the ozone concentration at 3 monitor stations in Guangzhou.The results show that:①Ozone formation is affected by weather condition with the largest average ozone concentration in clear days then in cloud days.The average ozone concentration in rain days is the smallest.② Ozone concentration also changes with season; ③ Further away from downtown,the ozone concentration becomes larger.This indicates that the center...

The spatial and temporal distributions and change characteristics of O_3 are studied by analysing the ozone concentration at 3 monitor stations in Guangzhou.The results show that:①Ozone formation is affected by weather condition with the largest average ozone concentration in clear days then in cloud days.The average ozone concentration in rain days is the smallest.② Ozone concentration also changes with season; ③ Further away from downtown,the ozone concentration becomes larger.This indicates that the center of the second pollutants is not the same as that of the first pollutants. The second pollutants are centred in the down wind of the first pollutants. With a high resolution chemical model,a simulation is carried out for the ozone concentration profile.The simulation reveals that ozone in low troposphere has large diurnal change and ozone in free atmosphere has small diurnal change.

通过对 1999年广州市 3个监测点 (市监测中心站 ,麓湖公园和龙归 )地面O3浓度的分析 ,研究广州地区地面O3浓度的时空分布及其变化特征 ,结果表明 :①天气条件的变化对O3形成具有明显的作用 ,即 :晴天O3平均浓度都大于多云天和阴雨天的值 ,阴雨天的值最小 ;②O3浓度具有明显的季节变化 ,其大小次序排列为冬季、秋季、夏季和春季 ;③远郊区的龙归测点O3的值均大于市监测中心站 ,麓湖公园测点也大于市监测中心站 ,这表明二次污染物的高浓度中心与一次污染物的中心不相重合 ,二次污染物在一次污染物的下风方形成。同时利用高分辨化学模式模拟了市监测中心站测点O3浓度廓线随时间的变化 ,结果表明 :对流层低层的O3浓度日变化幅度较大 ,尤其是白天变化非常明显 ;自由大气层内的O3浓度日变化较小。

 
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