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| Statistic and analysis on the data of short-time strong precipitation of single weather station in Yichun |
| Su Limin1,Ma Zhongyuan2,Qian Huanrong1,Liao Hong1 |
1.Yichun Meteorological Bureau of Jiangxi,Yichun 336000;
2.Jiangxi MeteorologicalScience Institute,Nanchang 330046 |
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Abstract By using the data of single weather station in Yichun from 2005 to 2012,40 samples of short-time strong precipitation are statistical analyzed in every 5 minutes.That the concept of exceed short-time strong precipitation with 10 minutes amount of precipitation≥10mm is summarized.Exceed short-time strong precipitation with 10 minutes amount of precipitation≥10 mm not only hold on to the highest frequency of occurrence in the past eight years,but also occur in short-time strong precipitation with 1 hour amount of precipitation≥30mm and 2 hours amount of precipitation≥50 mm.When short-time strong precipitation began,there are some obvious changes of air pressure rising,air temperature dropping,humidityascending,rainfall suddenly going up and leading wind increasing.It appears increasing trend of short-time strong precipitation year after year in Yichun weather station.Occurrence time of precipitation is central from April to Augustevery year and during the two periods of 4:00-5:00 BT and 14:00-20:00 BT every day.
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Received: 25 December 2012
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2013, Vol. 30 
