北京一次大暴雨的水汽收支和微物理過(guò)程數(shù)值分析

doi:10.3969/2013jms.0079

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北京一次大暴雨的水汽收支和微物理過(guò)程數(shù)值分析
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                        10.3969/2013jms.0079
                    
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基金項(xiàng)目:國(guó)家自然科學(xué)基金資助項(xiàng)目(41275113)

Numerical simulation on water vapor budget and microphysical process of Beijing torrential rain on 21 July 2012

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利用NCEP1°×1°再分析資料和常規(guī)氣象觀測(cè)資料,使用WRF模式對(duì)2012年7月21日發(fā)生在北京地區(qū)的一次特大暴雨天氣過(guò)程進(jìn)行數(shù)值模擬.在模擬結(jié)果的基礎(chǔ)上,分析了此次暴雨過(guò)程的形勢(shì)演變和水汽條件,并分別計(jì)算了暴雨發(fā)生過(guò)程中北京全市范圍內(nèi)的水汽輸送、水汽收支、大氣可降水量和空中各相態(tài)水物質(zhì)的量值大小、空間分布情況及其相互轉(zhuǎn)化關(guān)系.結(jié)果發(fā)現(xiàn):這次降水主要受高空槽、低渦和地面切變線的影響.有東南、西南兩條水汽輸送通道,計(jì)算區(qū)域上空水汽收支變化與地面雨強(qiáng)的演變對(duì)應(yīng)很好.中低層持續(xù)而強(qiáng)烈的水汽凈輸入,為暴雨的發(fā)生發(fā)展提供了很好的水汽條件.北京各站點(diǎn)大氣可降水量普遍超過(guò)歷史極值,反映了降水的極端性.降水發(fā)展不同階段,云內(nèi)微物理過(guò)程存在差異,降水量初期以暖雨為主,降雨量不大,之后冷雨過(guò)程增強(qiáng),降水量迅速增大.

Abstract:

Using NCEP 1°×1° reanalysis data and conventional observation data, a numerical simulation and analysis on a rainstorm on July 21, 2012 in Beijing were studied with the WRF model. Moreover, the large-scale weather situation and water vapor conditions were analyzed, and then the water vapor transportation, budget, atmospheric precipitable water, the concentration, distribution and transformation of water at each phase during the rainfall were calculated. The results indicated that the upper-level trough, low-level vortex and surface wind shear were the main influencing systems to the rainfall. There are two water vapor transportation channels: southeast and southwest. The water vapor budget in mid-low level corresponded well with rainfall intensity. The sustaining and strong net input of southeast and southwest warm wet air was an important water condition for the heavy rainfall. Atmospheric precipitable water at all meteorological stations in Beijing were higher than those in history. In the early period, precipitation was mainly warm rain process with moderate amount, then the cold rain process enhances quickly and the rain amount rapidly increases.

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岳甫璐,王春明,王慧鵬.北京一次大暴雨的水汽收支和微物理過(guò)程數(shù)值分析.氣象科學(xué),2014,34(6):692-699 YUE Fulu, WANG Chunming, WANG Huipeng. Numerical simulation on water vapor budget and microphysical process of Beijing torrential rain on 21 July 2012. Journal of the Meteorological Sciences,2014,34(6):692-699

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收稿日期:2013-03-18
最后修改日期:2013-08-19
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抽查舔水白紧大视频,冲喜娘子超甜哒激情五月,亚洲黄色图片偷拍网站,亚洲三级黄片免费播放,91在线观看喷潮红桃,日韩精品在线观看一区二区,久久久久久久久久久久黄色片子,日产精品99久久久久久久久,欧洲亚洲另类图片小说