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气象:1997,23(10):3-7
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一维积云模式计算降雹最大尺度
(1.北京大学地球物理系,100871;2.中国气象局人工影响天气研究所,北京 100081)
Forecasting Maximum Hail Size with a Numerical Model of Cumulus
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中文摘要: 采用一维积云模式计算积云的发展和冰雹的增长,根据当天07时的探空资料,用模式计算积云的发展,给出云顶高度,云顶温度,云底高度,云中0℃层高度,云内、外温度分布,以及云内上升气流速度和含水量的分布;再由设定的模式计算冰雹的增长,求出雹云中生成的最大冰雹尺度,考虑0℃层以下冰雹的融化,计算出降到地面上的最大冰雹尺度。与实际观测的最大降雹尺度比较,发现计算结果较好。由此得出结论,用此模式预报最大冰雹尺度是可行的。这为冰雹预报提供了一种方法。
Abstract:The one dimensional time independent cumulus model is used to compute the hail size.By means of the sounding data at 07 o'clock as input,the altitude and temperature of the cumulus top,the altitude of the cumulus base,the altitude of 0℃ level in cumulus,the distributions of temperature and vertical velocity of upward current and the water content in cumulus can be given.We calculate the growing and melting of hail and forecast the maximum hail size as it falling on the ground.Comparison of forecast and measurement of the maximum hail size make us satisfied.It indicates that using this model to forecast the maximum hailstone size is feasible.This provides a method of hail forecasting.
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引用文本:
吴保民,盛裴轩,王雨曾,1997.一维积云模式计算降雹最大尺度[J].气象,23(10):3-7.
,1997.Forecasting Maximum Hail Size with a Numerical Model of Cumulus[J].Meteor Mon,23(10):3-7.