| 闽西北地区降水回波特征和人工增雨作业条件分析 |
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| 引用本文： | 林长城,陈彬彬,隋平,王宏,夏辉,陈敏艳.闽西北地区降水回波特征和人工增雨作业条件分析[J].气象科技,2011,39(6):697-702. |
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| 作者姓名： | 林长城 陈彬彬 隋平 王宏 夏辉 陈敏艳 |
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| 作者单位： | 1. 福建省气象科学研究所,福州,350001
2. 福建省气象局,福州,350001 |
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| 基金项目： | 福建省科技厅重点项目(2009Y006)、2005年福建省气象局科研课题(200502)和2008年福建省气象科学研究所科研课题共同资助 |
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| 摘 要： | 利用新一代天气雷达回波资料、850 hPa天气图和地面降水资料对闽西北地区的云雨资源、有利人工增雨作业的天气系统、降水回波特征及人工增雨作业指标进行分析.结果表明:福建闽西北地区有利于开展人工增雨作业的主要天气系统可分为9类:大陆高压、副高外围、暖区辐合、热带辐合带、低槽、台风(低压)、低涡、低涡切变和其他类.积层混合...
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| 关 键 词： | 回波特征 作业指标 人工增雨 |
| 收稿时间： | 2010/6/10 0:00:00 |
| 修稿时间： | 2011/6/30 0:00:00 |
Characteristics of Precipitation Echoes and Conditions for Rocket Precipitation Enhancement Operations in Northwest Fujian |
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| Lin Changcheng,Chen Binbin,Sui Ping,Wang Hong,Xia Hui and Chen Minyan.Characteristics of Precipitation Echoes and Conditions for Rocket Precipitation Enhancement Operations in Northwest Fujian[J].Meteorological Science and Technology,2011,39(6):697-702. |
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| Authors: | Lin Changcheng Chen Binbin Sui Ping Wang Hong Xia Hui and Chen Minyan |
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| Institution: | Fujian Institute of Meteorological Science;Fujian Institute of Meteorological Science;Fujian Institute of Meteorological Science;Fujian Institute of Meteorological Science;Fujian Meteorological Service, Fuzhou 350001;Fujian Meteorological Service, Fuzhou 350001 |
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| Abstract: | The cloud and precipitation resources, weather systems propitious to precipitation enhancement operations, precipitation echo characteristics, and indexes of precipitation enhancement operations in Northwest Fujian are analyzed, based on the CINRAD radar echo images, 850 hPa synoptic charts and surface precipitation data from 299 weather processes from May 2005 to July 2007. The results show that the chief weather systems propitious to precipitation enhancement operations include continental high, subtropical anticyclone, warm sector convergence, tropical convergence, the other, trough, typhoon （low pressure）, low vortex, and low vortex shear, respectively. Stratus cumulus mixed clouds were the primary objects of local precipitation enhancement operation. For cumuliform clouds and stratus cumulus mixed clouds, the larger the echo height and area were, the higher the corresponding precipitation grade was. The echo intensity and the depth of negative temperature layer of stratus cumulus mixed clouds had great effects on precipitation grade. The indexes of rocket precipitation enhancement operations in Northwest Fujian were： the echo intensity of cumuliform clouds and stratus cumulus mixed clouds should be larger than 30 and 25 dBz, the echo top should be higher than 5500 and 5000 meters, the depth of negative temperature layer should be larger than 1500 and 2000 meters, the echo area should be larger than 1000 and 2500 square kilometers, the vertically integrated liquid water should be more than 1 kg·m^-2 , and the cloud top temperature of nephsystem should range from -28 ℃ to -12 ℃, respectively. |
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| Keywords: | echo characteristic operation index precipitation enhancement |
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