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| 广东中部地区雷电和CINRAD雷达回波的统计关系 |
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彭丽英1, 万齐林2, 王谦谦3, 易燕明2
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1.茂名市气象局, 广东 茂名 525000;2.中国气象局广州热带海洋气象研究所, 广东, 广州, 510080;3.南京信息工程大学KLME, 江苏 南京 210044
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| 摘要: |
| 应用2004年4～8月广州雷达资料和广东省电力部门闪电资料,采用闪电位置资料与雷达回波强度相叠加的方法进行统计。结果表明,负闪频次的值偏多时,既不在低层的弱回波上,也不在高层的强回波上,而是在中间层4～16层(2～14 km)的12～45 dBz较强回波上。在6～14层(3～11 km)10～35 dBz回波上,广东中部地区负闪面积偏大。在第1～10层(0.5～7 km)44～51 dBz强回波上,出现负闪雷电的概率是0.4～0.7。 |
| 关键词: 广东中部地区 雷达回波 负闪 叠加方法 |
| DOI： |
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| 基金项目:广东省自然科学基金项目(编号200423–E0011);国家自然科学基金项目(编号2005DIB3J110)共同资助 |
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| THE STUDY OF THE RELATION BETWEEN LIGHTNING FLASH AND CINRAD DOPPLER RADAR’S ECHO IN THE CENTRAL AREA OF GUANGDONG |
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PENG Li-ying1, WAN Qi-lin2, WANG Qian-qian3, YI Yan-ming2
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1.Weather Bureau of Maoming, Guangdong 525000, China;2.Guangzhou Institute of Tropical and Marine Meteorology, CMA, Guangzhou 510080, China;3.KLME, NUIST, Nanjing, Jiangsu 210044, China
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| Abstract: |
| Based on the CINRAD Doppler radar data in Guangzhou and the lightning flash data in 2004 bypower suppliers of Guangdong, statistical study is done by overlaying lightning's position on radar's echo.The result shows the followings. The concentrated period in which there was more negative lightningfrequency occurred at the middle levels (2~14 km), where radar echo was moderate (12~45 dBz), rather thanat the low levels with the weakest echoes or at high levels with strongest echoes. At levels 3~11 km, wherethe radar echo was between 10 dBz and 35 dBz, the area of negative lightning was much larger in centralGuangdong than the rest of province. At levels 0.5~7 km where there the radar echo was between 44 dBz and51 dBz, the probability for a point to have negative lightning flash varies from 0.4 to 0.7. |
| Key words: central Guangdong radar echo negative cloud-to-ground lightning overlaying analysis |