potential vorticity 中文意思是什麼
potential vorticity
解釋
位勢渦度-
One of factors which activize the explosive development of cyclone exists strong convective instability in lower layers from the analysis of the barotropic potential vorticity
由正壓位渦分析得出，氣旋爆發性發展的啟動因子之一為低層存在強對流性不穩定。 -
In a word, convective instability strong baxoclinicity barotropic advection of potential vorticity and latent heat release are factors which activize this explosive development of cyclone
總之，對流不穩定、強斜壓性和正壓位渦平流、潛熱釋放是本次氣旋發展的啟動因子。 -
Inertial instability barotropic advection of potential vorticity the subsidence of the large value of potential vorticity above cyclone and geostrophic adjustment process is dynamical factors which make the cyclone developed violently
慣性不穩定，正壓位渦平流以及正壓位渦大值下沉至氣旋上空和地轉適應過程是氣旋強烈發展的動力因子。 -
The result indicates that, in the course of the rainstorm in huoshan, there are obvious low - level jet of great intensity, infection of mesoscale shear line, enhancement of plus vorticity which increases intensity of convergence, improves ascending velocity and brings on precipitation, and quick enhancement of helicity which provides the basis to forecast, in addition, convergence of moisture flux and analyzed potential vorticity which reflects baroclinic convective instability sufficiently indicate the characteristics of the rainstorm
結果表明：此次霍山暴雨發生前後，存在明顯的大強度低空急流，並受到中尺度切變線的影響，而且正渦度的加強引起了輻合加劇，提高了上升速度從而引起降水，同時暴雨發生前螺旋度的迅速增強，也為預報提供了根據，另外水汽通量的輻合以及分析位渦反映出的斜壓對流不穩定都充分體現了這次降水的特點。 -
The variation of the negative / positive value of the baroclinc potential vorticity under 850hpa has a very good corres pondence with the development of the cyclone
850hpa以下的斜壓位渦的正負值的變化與氣旋的發展有很好的對應關系。 -
Strongly strengthening of the low level jet and releasing of the latent heat of condensation have effect on the occurrance of the disturbance of the moist potential vorticity in low lever, which is important conditions to the genesis and development of mesoscale vortex
低空急流的加強以及凝結潛熱的釋放均可以影響到低層濕位渦擾動的產生，從而有利於中尺度低渦的生成和發展。減弱低空急流的對比實驗證明了低空急流在對流層中低層中尺度低渦的生成和發展過程中起著關鍵性作用。 -
Through the thermodynamic analysis for the sandstorm weather according to the simulated potential temperature, potential vorticity field, it is found that this sandstorm weather occurred in the condition of the atmospheric stratification stability, the area of the high potential temperature value and the potential temperature gradient have a good corresponding relationship with the surface cold air and cold front, so are the strength of potential vorticity and the different developing stage of sandstorm
利用輸出的位溫、位勢渦度場，對沙塵暴天氣進行熱動力條件分析，發現本次沙塵暴天氣發生在大氣層結穩定狀態下，位溫大值區及位溫梯度與地面暖低壓的強弱和移動有著很好的對應關系，位渦的水平分佈特徵和強弱變化對沙塵暴的出現時間和落區有一定的指示意義。 -
With the simulated results of the high resolution of space - time, from the aspects of thermodynamic, dynamical, moist available energy and moist potential vorticity, the direct effect mesoscale system was analyzed to this weather process, including mesoscale low level jet, mesoscale vortex etc. meanwhile, its features and physical mechanism of the formation and development are further discussed to seek for some basis for deeper research and storm rainfall forecast
運用高時空解析度的模式結果，從熱力、動力結構、濕有效能量和濕位渦等多個角度，著重分析討論了對這次天氣過程有直接影響的低空急流、中尺度低渦等中尺度系統，探討了影響這次天氣過程的中尺度系統的發生、發展特徵和物理機制，試圖為更進一步的研究和暴雨預報提供一些依據。 -
Through analysis of potential vorticity in isobaric surface field, in low - troposphere a positive potential vorticity disturbance exist and form incline disturbance column northward before rainstorm generation, at the same time have also reflected positive potential vorticity disturbance for severe convection weather trigger role in lower - troposphere ; soon positive potential vorticity disturbance in high - troposphere downward, form one vertical disturbance column, now corresponding precipitation develop stage ; in the prosperous stage of rainstorm that maintains isolines of horizontal distribution and still have straight positive potential vorticity disturbance in 600 - 700 hpa isobaric surface field ; when near ground arises negative potential vorticity disturbance, precipitation also weaken
通過對等壓面的位渦分析，發現了在暴雨發生前，在對流層低層有正位渦擾動存在並向北形成傾斜的擾動柱，同時也反映了對流層低層正位渦擾動對強對流天氣的觸發作用；隨后高層正位渦向下擾動，形成一個垂直擾動柱，這時對應降水的發展階段：在暴雨的鼎盛階段， 600 700hpa上空維持水平分佈的等值線，在其上還有正的位渦擾動；當近地面出現負的位渦擾動時，降水隨之也減弱。 -
The potential vorticity ( pv ) on isobaric and isentropic surface was studied. furthermore, the pv structure of another rainstorm caused by the 9711 typhoon was compared with it and the difference of the two rainstorm was discussed
另外又與1997年第11號臺風登陸北上造成山東全省大到暴雨過程的位渦場結構進行了對比分析，討論了兩次暴雨過程位渦場結構的異同。 -
Through analysis of potential vorticity in equity - entropy surface field, a relatively high potential vorticity center in cyclone top in low - troposphere have discovered, and make cyclone develop in a more deep cyclone circulation by this ; and an anticyclone circulation zone with more severe low potential vorticity in high - troposphere
通過對等熵面的位渦分析，發現了對流層中低層的位渦場，在氣旋上方有一個相對高位渦中心，由此使得氣旋在一個比較深厚的氣旋性環流中發展；而對流層高層則是一個伴有較強位渦低值的反氣旋環流區。 -
We make a diagnostic analysis about the evolution and distribution of the wet potential vorticity of the integral result of the model simulation at each time. we find that the explosive of the cyclone has a closely relationship with the advection of the potential vorticity
從氣旋發展過程中的位渦著手，對模式積分結果的各個時次的濕位渦的空間分佈和隨時間的演變進形了診斷分析，得出：氣旋的爆發與位渦的平流關系密切。 -
The mcc develops mechanism is analyzed based on moist thermal wind theory, relatively mesoscale convectively generated vortex, potential vorticity thinking, inertial instability theory and so on
用濕熱成風、相對中層渦旋、等熵位渦、慣性穩定度等討論了mcc的發生發展機理。 -
Generally under 300hpa the subsidence zone of the potential vorticity lies above cyclone at the violent stage of the development of the cyclone, however, the center of cyclone still lies near the potential vorticity of large value above 300hpa
氣旋強烈發展期，一般300hpa以下，位渦的下沉區在氣旋的上空， 300hpa以上氣旋中心仍位於大值位渦後部。 -
It contributes to the development of the cyclone when the center of the potential vorticity is behind the cyclone at initial stages of the development of the cyclone and there is a manifest inverted conical subsidence zone under the 200hpa, which lies in the rear of cyclone
氣旋的發展初期，位渦中心位於氣旋的後部， 200hpa以下有明顯的倒圓錐形下沉區，該下沉區位於氣旋的後部。這種形勢有利於氣旋上空的位渦增長。 -
The article point out that the downward transport of the high moist potential vorticity from high level causes the development of low level cyclone. the rainfall may occur near the south area of positive center of mpv1 and negative region of mpv2 at 500hpa
在整個降水過程中，副熱帶高壓穩定少動，其西北側的暖濕氣流為強降水提供了充沛的水汽條件，地面冷鋒和高原低渦是其抬升機制。 -
In the first part of paper, we introduce the appliance of doppler weather radar in meteorological work in the near future, and simply enumerate all kinds of adjoint methods to retrieve data of radar. in the second part of paper, we choice some methods that are usually used domestically and overseas, compare excellence and flaw of the methods by using data of simulate wind field, analyze synthetically the precision of simulate result, the length of retrieval time and the structure of data distributing, lastly decide to regard ameliorated quasi - 4d adjoint method as retrieval technology in the paper. in the third part of paper, we retrieve the data of single doppler weather radar in hefei, anhui province, then calculate 3d wind field, streamline field, divergence, vorticity, helicity, moisture flux, divergence of moisture flux and potential vorticity from the result of retrieval
文中第一部分對近年來多普勒天氣雷達在氣象工作中的應用作了介紹，同時簡單的羅列了反演雷達資料的各種變分方法；接下來在第二部分選取了幾種國內外常用的反演方法，利用模擬的風場資料比較各種方法的優缺點，從模擬結果的精度、反演時間的長短、資料的分佈結構上綜合分析，最後決定將已做改進的準四維變分分析方法作為本文的反演工具；第三部分就是反演安徽合肥多普勒天氣雷達資料，然後由反演得出的風場計算了各個時間各個層次的三維風速、流場、散度、渦度、螺旋度、水汽通量、水汽通量散度和位渦。 -
By the analysis of the relationship among convective instability, symmetric instability and snowstorm, we found that the convective instability level is under 800hpa. snow belt is located in the negative value region of moist potential vorticity and verified the theory of symmetric instability
最後分析了這場暴雪中西北和東北地區的對流和對稱穩定度，個例分析表明，暴雪產生在低層對流不穩定的情況下。 -
Application of potential vorticity diagnosis in forecasting strong rain and hail storms over loess plateau
位渦診斷在黃土高原強對流風暴預報中的應用 -
The effect of horizontal component in moisture potential vorticity is larger than that of vertical component. that is a big difference between torrential rain in summer and snowstorm in winter. the instability in the middle and lower layer of troposphere is one of the triggers in snowstorm
進一步分析表明，條件性對稱不穩定判據濕位渦的兩個分量中，水平分量在暴雪產生過程中所起作用要大於垂直分量，這是與夏季暴雨過程中得到的結論截然不同的。
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