华南暴雨试验期间香港风廓线雷达资料的评估

REVIEW OF WIND PROFILER DATA OF HONGKONG DURING IOP OF HUAMEX AND SCSMEX

关键词:  风廓线雷达  有效率

Key words:  wind profiler  availability

摘要:

风廓线雷达资料无论对暴雨等中尺度现象还是对季风等大尺度现象的研究都很有科学价值。为有效地利用香港天文台提供的1998年华南暴雨和南海季风科学试验期间的风廓线资料,简要介绍了资料的性质和数据结构,并对资料的有效性进行了初步评估。给出了风廓线资料有效率随高度的分布及不同天气状况对资料有效率的影响。指出每10分钟一次的资料的有效率在相邻时次之间存在很大的差别,应使用多时次平均以增强其代表性。另外,通过了一致性检验的有效资料中仍可能存在少数代表性较差的资料。风廓线资料与探空资料对比发现两者所得的垂直风场精度相当。上述结果可作为应用风廓线雷达资料时的参考。

Abstract:

The wind profiler data is very valuable to the research not only on meso-scale phenomena such as storm but also on large-scale phenomena such as monsoon. The nature and format of the wind profiler data collected at Hongkong astronomical observatory during the IOPs of HUAMEX and SCSMEX experiments are introduced briefly. The available rate of the wind profiler data is evaluated in order to accurately use the data in the scientific researches. The distribution of the available rate of the wind profiler data along with the height and the effect of different weather on the available rate were discussed. Due to the great difference of available rate between data at adjacent 10-minute intervals,the average of multi-times should be done to improve the accuracy of the data. Additionally,some of the available data may stili be in doubtful representation even though they had passed the quality control. Those results could be a reference to the application of the Doppler wind profiler data.