【作者】 黄彦彬；

【机构】 海南省气象与生态研究所；

【摘要】 利用2005年4～7月海口雷达站观测的713数字化天气雷达资料,对海南省北部地区境内的对流云降水回波进行了统计分析。统计结果发现:该地区4～7月对流云初始回波多在午后12～18时出现,其中自西南向东北移动的回波占主导地位,移动速度一般在10～30km/h;平显上块状回波占主导地位,所占比例为47.6%,其次是带状、涡旋状,对流云的生命史多在60～120min左右。高显上没有观测到回波顶高在0℃层以下的降水回波,回波最大顶高平均为14.3km,平均冷暖区厚度之比为2.3,说明琼岛北部地区春夏季热带对流云中暖云的降水几率很小,大部分为发展旺盛、负温区比较深厚的对流云,这种云非常适合冷云催化。更多还原

【Abstract】 Using the 713 type digital weather radar data in 2005,the echo of convective cloud precipitation that showed higher from April to July around The north of Hainan province was analysed. We found that in this area,The great majority of early echo began in afternoon from 12h to 18h ,and generally moving route is toward northeast from the southwest and the moving speed about in the 10-30 km/h. About 47.6 percent of the echo was isolated in the plane vision, other zonary and swirl. The lifetime of convection cloud precipitation was almost 30～120min. The echo peak under the 0℃ layer was not founded in the height vision. The average echo peak was about 14.3 kilometer;The thickness radio in the cold cloud and warm clod was 2.3.We can draw a conclusion that the precipitation probability of warm cloud in the convective cloud was very small,and the convective cloud with big negative temperature was favourable condition of artificial precipitation stimulation.更多还原