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气象:1998,24(10):14-19
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9608台风低压外围暴雨中尺度分析
(河北省气象台,石家庄 050021)
Mesoscale Analysis on the Heavy Torrential Rain within the Outside Lane of the Typhoon Low 9608
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中文摘要: 1996年8月3~5日河北特大暴雨是在台风低压外围停滞的中-α云团产生的。中-α云团在三支气流汇合和共同作用下发生发展:①低层偏东风干冷气流,②中低层南风暖湿急流,③副热带高空急流。中-α云团内的中尺度扰动现象明显。其中有中-β东风切变线扰动先后出现3次以上;中-β低压先后出现2个以上。中-β系统均伴随强雨团活动。雨团在石家庄西部山区停滞长达14小时,36小时雨量达到670mm。暴雨中心出现在海拔500m左右的迎风坡和喇叭口处。
Abstract:The heavy torrential rain which happened in Northern China during August 3~5 in 1996 was the result of the stationary meso α cloud cluster within the typhoon low outside lane. The generation and development of the meso α cloud cluster were interacted by three air flows:1) low level easterly dry cold airflow, 2) low and medium level southerly wet warm jet stream, and 3) sub tropical upper jet stream. The mesoscale disturbances within the meso α cloud cluster were frequent. The disturbance caused by the meso β easterly wind shearline occurred three times or more while the disturbance caused by the mesa β low pressure occurred two times or more. The heavy rain cluster was accompained by meso β low pressure motion. The rain cluster stagnated more than 14 hours at the western mountain area of Shijiazhuang, where it brought 670mm rainfall in 36 hours. The heavy rain was centered at the windward slope and bell terrain near 500m sea level elevation.
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基金项目:北京大学暴雨监测与预测国家重点实验室资助
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引用文本:
游景炎,胡欣,杜青文,1998.9608台风低压外围暴雨中尺度分析[J].气象,24(10):14-19.
,1998.Mesoscale Analysis on the Heavy Torrential Rain within the Outside Lane of the Typhoon Low 9608[J].Meteor Mon,24(10):14-19.