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投稿时间:2012-03-20 修订日期:2012-12-17
投稿时间:2012-03-20 修订日期:2012-12-17
中文摘要: 〗零度层亮带对研究层状云降水机理和人工影响天气作业具有意义,应用风廓线雷达对北京2010年4—9月不同类型的降水进行观测,提出了针对北京地区的亮带识别算法,通过订正的亮带识别算法对降水数据进行亮带识别,得到了延庆地区亮带出现的高度、持续时间以及和降水量、降水类型的对比等数据。根据统计结果得到了2010年夏季北京延庆地区融化层的分布特征,回波强度最大值主要出现在36~40 dBz之间,亮带厚度主要为1000~1500 m,上下边界速度差值主要为4~5 m·s-1。〖JP〗
中文关键词: 零度层亮带, 风廓线雷达, 回波强度, 速度
Abstract:Bright band is meaningful for stratus precipitation mechanism research and weather modification. By using the observed data of wind profile radar of different types of precipitation in Beijing from April to September 2010, this paper puts 〖JP2〗forward the bright band recognition algorithm, distinguishing bright band information from precipitation data by the corrected recognition algorithm, and obtaining the height and duration of bright band as well as the comparison of precipitation amount and precipitation type in Yanqing, Beijing. According to the statistical result, the distribution characteristics of the melt layer in Yanqing, Beijing in the summer of 2010 are got. The maximum of echo intensity mainly appears in 36-40 dBz, the thickness of bright band is 1000-1500 m, and the difference of upper and lower boundary velocity is 4-5 m·s-1.〖JP〗
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基金项目:国家自然科学基金项目(41075023)和北京市优秀人才培养资助项目(2012D002034000001)共同资助
引用文本:
黄钰,马建立,阮征,葛润生,嵇磊,2013.2010年夏季北京零度层亮带特征统计[J].气象,39(6):704-709.
HUANG Yu,MA Jianli,RUAN Zheng,GE Runsheng,JI Lei,2013.Feature Statistics on Bright Band in Beijing in 2010 Summer[J].Meteor Mon,39(6):704-709.
黄钰,马建立,阮征,葛润生,嵇磊,2013.2010年夏季北京零度层亮带特征统计[J].气象,39(6):704-709.
HUANG Yu,MA Jianli,RUAN Zheng,GE Runsheng,JI Lei,2013.Feature Statistics on Bright Band in Beijing in 2010 Summer[J].Meteor Mon,39(6):704-709.