| 鄂西北对流云及其人工催化的三维数值模拟个例研究 |
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| 引用本文： | 何观芳,胡志晋,李淑日.鄂西北对流云及其人工催化的三维数值模拟个例研究[J].应用气象学报,2001,12(Z1):96-106. |
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| 作者姓名： | 何观芳 胡志晋 李淑日 |
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| 作者单位： | 中国气象科学研究院, |
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| 基金项目： | 本文得到国家自然科学基金49675247项目和国家科技攻关（96-020-01-05）课题的资助 |
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| 摘 要： | 该文把三维对流云模式应用于湖北省西北部地区的对流云降水研究和人工增雨试验设计，并和张家口冰雹云个例的模拟进行了比较。模拟结果表明该地区给定季节的对流云主要特征有云底温度（约26℃)。云中上升气流速度中等（最大约18m/s)，初始回波在较暖区1～-2.5℃)形成，云的回波顶高约13km。前期的暖支降水对地面雨量贡献很大。播云的数值模拟结果显示了初始回波出现后约10min回波项高到达-22℃处时，在温度为-2～-6℃层的支的中心部位引进5×105～107个/kg碘化银冰核，使地面降雨只有身长弱增加。湖北西北部对流云中过冷云水偏少，最大仅5g/kg和3.8g/kg,面且过冷云水大值区温度偏高（-2.5℃).催化后云中最大上升气流和地面格点最大雨量值变化不大，有时减少，后期降雨量增加，下风方雨量增加，分布更加均匀，但总雨量增加不多。
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| 关 键 词： | 对流云碘化银冰核催化增雨 |
| 修稿时间： | 2000年7月25日 |
NUMERICAL SIMULATION
OF RAIN ENHANCEMENT EXPERIMENT IN
NORTHWESTERN HUBEI PROVINCE OF CHINA |
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| He Guanfang,He Zhijin,Wang Guanghe.NUMERICAL SIMULATION
OF RAIN ENHANCEMENT EXPERIMENT IN
NORTHWESTERN HUBEI PROVINCE OF CHINA[J].Quarterly Journal of Applied Meteorology,2001,12(Z1):96-106. |
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| Authors: | He Guanfang He Zhijin Wang Guanghe |
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| Abstract: | In order to design the rain enhancement experiment in Shiyan of China a series of numerical simulation was conducted by using a 3D convective cloud model. In agreement with observations the model results show that the convective clouds, as the major contributor to rainfall in the given region, and season, had a warm base temperature （about 25℃）and moderate updraft （maximum value is about 18 m/s). The first echo formed in the warm region and the maximum height of cloud top was about 13 km. The numerical simulation of ice nucleus seeding shows when the cloud top temperature reached －22℃, i.e, about 10 min after the appearance of first echo, seeding with artificial AgI nucleus in concentration of 5×105 to 107 /m3 in the central part of cloud with a temperature of －2℃ to －6℃ might lead to a slight increase of total rainfall. Maximum cloud height and updraft did not change significantly. The simulation also shows that changes of the seeding time, location and dosage within certain limits have a more or less stable effect on seeding. |
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| Keywords: | Convective cloud AgI Nucleus Precipitation enhancement |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
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