广东中部地区雷电和CINRAD雷达回波的统计关系
THE STUDY OF THE RELATION BETWEEN LIGHTNING FLASH AND CINRAD DOPPLER RADAR’S ECHO IN THE CENTRAL AREA OF GUANGDONG
-
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。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
-
[1] 张敏锋,刘欣生,张义军,等.广东中部地区雷电活动的气候分布特征[J].热带气象学报,2000,16(1):46-53. [2] 吴恒强.广西雷暴活动特点分析[J].热带地理,2004,24(2):123-126. [3] 覃卫坚.广西雷电活动时间分布规律[J].广西气象,2000,21(4):32-35. [4] 易燕明,杨兆礼,万齐林,等.近50年广东省雷暴、闪电时空变化特征的研究[J].热带气象学报,2006,22(6):539-546. [5] 林爱兰,吴尚森.近40年华南汛期旱涝变化及趋势预测[J].热带气象学报,1996,12(2):160-166. [6] 吴尚森,梁建茵.华南前汛期旱涝时空分布特征[J].热带气象学报,1992,8(1):87-92. [7] 吴尚森,黄成昌,薛惠娴.华南后汛期的年际变化[J].热带气象学报,1990,6(4):348-355. [8] 余功梅.华南地区近40年降水的气候特征[J].热带气象学报,1996,2(3):252-256. -
点击查看大图
计量
- 文章访问数: 864
- HTML全文浏览量: 4
- PDF下载量: 1366
- 被引次数: 0
下载:
粤公网安备 4401069904700003号