convection rainfall 中文意思是什麼
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This pattern of ssta distribution is related to summer rainfall anomaly of north china by means of the tropical convection activity and general circulation in the middle and high latitude
這種海溫異常分佈型可通過夏季熱帶對流活動和中高緯大氣環流與華北夏季降水異常產生聯系。 -
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
作為對比，本文還對2002年6月24 - 25日發生在北京地區的強地形雨進行了分析，並討論陜南、北京地區兩地暴雨的異同點以及地形作用的共性和個性，為兩地暴雨預報提供有益的參考，得出了一些很有意義的結果： 1大尺度環流背景分析表明： （ 1 ） 「 02 . 6 」強降水與6月上旬越赤道氣流和季風爆發密切相關，攜帶大量水汽的偏南氣流與冷空氣於6月8日交匯在西北地區東部，導致了這次強降水的發生； （ 2 ） 200hpa的副熱帶西風急流、 500hpa副高以及850hpa的低空急流的配置非常有利於本文分析之陜西強降水的發展與維持。大尺度形勢分析表明，東高西低形勢場、低空急流的建立和高低空形勢的配置決定了這場降雨出現在西北地區東部。與暴雨區相聯系，存在一支橫越低空急流的經向垂直環流，暴雨區處于該垂直環流的上升支； （ 3 ）偏南和偏東氣流水汽通道在西北地區東部交匯，水汽的輻合積聚主要在對流層低層和行星邊界層內完成； （ 4 ）整層的視熱源< q _ 1 >高值區在暴雨區附近呈東北-西南向分佈，與切變線走向非常一致，降水產生的凝結潛熱釋放是強降水區大氣的主要熱源。 -
And such zones act as an important dynamic condition for low - level water transfer and also a favorable environmental condition for " seeding - water supply ". there stronger echoes are detected, meaning that bubble convection develops in the precipitating fields of the clouds that are homogeneous in the main, causing centers of > 10 mm / hr surface rainfall to occur and migrate
這些不穩定區是低層水汽輸送摘要重要的動力條件，也是「播撒一供應」機制發生的有利的濕熱力環境條件，雲系較強降水回波在這里得到發展，使整體均勻的冷鋒層狀雲系降水場有較強回波帶和對流泡發展，帶來地面有> 10mmlh較強降雨中心產生和移動。 -
The first diagnostic analyses show that the heavy rainfalls are produced together by vortex, shear line and upper and lower jets, meiyu front. the condition of high energy, saturation, potential instability is propitious to the form and maintenance of heavy rainfall. the result of numerical simulation by mm5 model shows that heavy. rainfall has close relation with meso - scale vortex pole and strong convection
採用ncep全球譜模式和常規觀測資料對「 03 . 7 」江淮地區的兩次暴雨過程的影響系統及其可能機制進行了初步診斷分析，發現梅雨暴雨是受低槽、低渦、切變線、高、低空急流和梅雨鋒區共同影響造成的，該地區維持高能、飽和、潛在不穩定的環境，有利於暴雨的產生中尺度數值模式（ mm5 ）模擬結果表明梅雨暴雨與中尺度渦柱、強對流運動密切相關。 -
It has been found that ( 1 ) the first rainfall is mainly caused by the cold air from west ; ( 2 ) the convection systems over the qinghai - xizang plateau have direct impact on the rainfall ； ( 3 ) the moisture transport from the indochina peninsula through the south - western china provides a necessary condition for the first rainfall
其特點：以西路冷空氣影響為主；與高原的對流系統有直接聯系；從中南半島向東北，經我國西南的低層暖濕空氣輸送帶是春季強降水的必要條件。 -
In this paper, the results of simulating two rainfall cases show that lasg - rem adjoint model has good power of predicting rainfall. the adjoint coding technique is employed for projecting the adjoint programs of betts - miller cumulus convection scheme of lasg - rem model and their correctness is verified, indicating that the adjoint program and its nonlinear program are converse in theory
本文利用伴隨碼方法編制了lasg - rem模式的betts對流參數化方案及大尺度降水方案的同化模塊，並對其正確性進行了檢驗，結果表明構造的伴隨模塊與原模式非線性模塊具有理論和實際上的可逆性。
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