风廓线雷达资料在台风苏拉登陆过程中的应用初探  

Preliminary Analyses on Application of Wind Profiler Radar Data to the Landing Process of Typhoon Saola

作　　者：汪学渊[1] 李栋[1] 任雍[1] 陈孝腔[1] 朱会芸 

机构地区：[1]福建省大气探测技术保障中心,福州350001 [2]福建省永安市气象局,永安366000

出　　处：《气象》2013年第11期1431-1436,共6页Meteorological Monthly

摘　　要：为了研究风廓线雷达在台风天气过程预报中的作用,对2012年8月2—4日在福建秦屿镇登陆的台风苏拉天气过程统计分析,结果表明:风廓线雷达在台风苏拉登陆期间4 km以上高空有效数据获取率明显提高,确定风廓线雷达的有效探测高度为4.8 km;通过信噪比和垂直速度数据统计分析出台风登陆前后带来间歇性的降雨,而台风眼登陆主要表现为无降水天气,仅有少量的降雨,这一结论进一步在小时降雨量统计中得到验证;通过水平风速数据统计分析出台风登陆前后在有效探测高度内水平风速在25 m·s^(-1)左右,而台风眼登陆水平风速在0~3 m·s^(-1);统计结果与台风登陆物理过程相吻合。To study the role of wind profiler radar （WPR） in the forecasting of typhoon process, this paper statistically analyzed the radar detection data of typhoon Saola when it landed Qinyu Town, Fujian Province during 2-4 August 2012. The results show that there is a significant improvement in data acquisition rate in the high level above 4 km by WPR during the landing process of typhoon Saola and the effective detection height of WPR is 4.8 km. Statistical analysis of SNR （signal to noise ratio） and vertical velocity data show that the typhoon Saola brings intermittent rain before and after the landfall, and the landfall of typhoon eye produces little or no rain. This result is further verified in the hourly precipitation analysis. Statistical analysis of horizontal wind speed data shows that the horizontal wind speed in effective detection height is about 25 m·s-1 before and after the landfall of the typhoon, while the horizontal wind speed of the typhoon eye is about 0 to 3 m·s-1 over the landing period. This statistical result is consistent with the physical process of typhoon Saola landing.

关 键 词：风廓线雷达 苏拉台风 信噪比 垂直速度 水平风速 

分 类 号：P414[天文地球—大气科学及气象学]