垂直环流 meaning in English
vertical circulation
Examples
- The convergence of air at the lower levels and divergence aloft imply a vertical circulation which is schematically shown in the following cross - sectional diagram
下面是热带气旋的垂直环流示意图，图中可看到低层的空气辐合及高层的空气辐散。 - Using the mm5 model to conduct investigation of numerical simulation for this case , it was basically possessed of a capability to reproduce the genesis , development and evolution of the large - scale and mesoscale weather systems
本文以mm5模式模拟分析“雅安天漏”为代表，着重研究了不同边界层参数化方案对雨量中心强度、雨区分布的影响以及雅安暴雨时的纬向垂直环流结构。 - It provided not only continuously vapor but also the heat energy and momentum , and induced several meso - scale vertical circulations , in the meantime , it was helpful to maintains the strong upward motion in the rain area
通过诊断分析发现：低空急流提供了源源不断的水汽，同时也向雨区提供了主要的热量和动量，还激发出多个中尺度的垂直环流，使降水具有一定的中尺度特征。 - Special analysis is made to see the impact of different boundary layer parameterization schemes on some factors which affect the heavy rainfall such as vertical velocity , divergence , vorticity , divergence of water vapor flux , se field and so on
结果表明：复杂地形条件下，特别是降水有明显日变化的地区，边界层的作用是十分重要的，这在暴雨时的纬向垂直环流结构中表现地非常明显。 - The analysis of the large - scale synoptic situation shows that strong precipitation is closely related to the explosion of monsoon and the intensification of cross - equatorial flow which bring a lot of vapor and meet with cold masses at the eastern of northwest district on 8th , june causing extremely heavy rainfall ; that subtropical high - level jet at 200hpa , subtropical high at 500hpa and low - level jet at 850hpa are the weather backgrounds favorable to strong precipitation ; that the pattern of eastern highs and western lows and the establishment of a low - level jet and the coupling between upper - and low - level patterns that determine that the rain occurred in the east of the northwest china ( on average , this is the rainy season for the south of china , but not for the northwest china ) ; that water vapor comes from southerly and easterly flow which converge at the eastern of northwest district with convergence mainly in lower levels and pbl ; that the high value of the whole - level apparent heat source < q1 > is near the area of large rainfall in the direction of northeasterly - southwesterly agreeable to shear line very well and the condensation latent heat releasing is main heat source with vertical advection item playing key role in q1 and q2 ; that there is a vertical secondary circulation crossing low - lever jet whose ascending branch is at the area of large rainfall ; that the construction of convection instability and conditional symmetry instability results that there is not only deep thermal instability , but also moisture influx and triggering mechanism of thermal instability causing strong torrential rain
作为对比，本文还对2002年6月24 - 25日发生在北京地区的强地形雨进行了分析，并讨论陕南、北京地区两地暴雨的异同点以及地形作用的共性和个性，为两地暴雨预报提供有益的参考，得出了一些很有意义的结果： 1大尺度环流背景分析表明： ( 1 ) “ 02 . 6 ”强降水与6月上旬越赤道气流和季风爆发密切相关，携带大量水汽的偏南气流与冷空气于6月8日交汇在西北地区东部，导致了这次强降水的发生； ( 2 ) 200hpa的副热带西风急流、 500hpa副高以及850hpa的低空急流的配置非常有利于本文分析之陕西强降水的发展与维持。大尺度形势分析表明，东高西低形势场、低空急流的建立和高低空形势的配置决定了这场降雨出现在西北地区东部。与暴雨区相联系，存在一支横越低空急流的经向垂直环流，暴雨区处于该垂直环流的上升支； ( 3 )偏南和偏东气流水汽通道在西北地区东部交汇，水汽的辐合积聚主要在对流层低层和行星边界层内完成； ( 4 )整层的视热源< q _ 1 >高值区在暴雨区附近呈东北-西南向分布，与切变线走向非常一致，降水产生的凝结潜热释放是强降水区大气的主要热源。