摘要
利用大理国家气候观象台2008年4月至6月的风廓线雷达观测数据,分析风廓线结构在雨季进程的演变特征,发现随着雨季的进程风速逐渐减小,风速振幅逐渐变小,高空自由大气动量下传效应逐渐减弱,高层大气有明显的转变,西风减小,北风增强;大气低层风速日变化雨季前明显,随着雨季的到来逐渐减弱,雨季风速日变化不明显。通过这样的分析对研究边界层风的季节变化具有重要的意义。
Using the data from April to June in 2008, which were collected by wind profiler radar in Dali National Climate Observatory, the evolution of wind profile structure characteristics in the rainy season process are ana- lyzed. The results show that with the process of rainy season, the speed and amplitude of wind decreased gradual- ly, the momentum transfer effection of free high-altitude atmosphere weakened gradually, high-altitude atmos- phere direction had a obvious transfer, west wind were decreased while north wind were enhanced; wind in lower layer atmosphere had a obvious diurnal variation before rainy season, then decreased gradually in the beginning of rainy season and had no variation in the process of rainy season. These analysis have a great significance about the seasonal wind changes in boundary layer.
出处
《云南地理环境研究》
2012年第1期17-24,共8页
Yunnan Geographic Environment Research
基金
云南省气象局预报员技术开发专项(YB201210)
中国气象局行业专项(GYHY201006054)
云南省应用基础研究项目(2008CD178)共同资助
关键词
风廓线雷达
风廓线结构
特征
wind profiler radar
wind profiler structure
characteristic
