A Comparison of the Finescale Structures of a Prefrontal Wind-Shift Line and a Strong Cold Front in the Southern Plains of the United States
A Comparison of the Finescale Structures of a Prefrontal Wind-Shift Line and a Strong Cold Front in the Southern Plains of the United States
复制标题
美国南部平原前额风移线与强冷锋细尺度结构的比较
DOI：
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
J. Houser
中科院分区：
文献类型：
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作者：
H. Bluestein;Z. Wienhoff;D. Turner;D. Reif;J. Snyder;K. Thiem;J. Houser
摘要本研究的目的是确定与锋面风移线相关的风场和温度场的精细尺度特征，并将其与强冷锋相关的风场和温度场进行对比。来自移动偏振x波段多普勒雷达和监视s波段雷达的数据、从热力学测深仪获取的温度剖面图以及俄克拉荷马州Mesonet的地面观测数据用于分析2013年11月11日俄克拉荷马州的锋面风移线。利用来自同一移动雷达和俄克拉何马Mesonet的数据，确定了2013年4月9日俄克拉何马州强地面冷锋相关的风场的精细尺度特征。结果表明，锋面风移线的运动学和热力学结构与入侵（密度流升高）相似，冷锋的运动学结构与经典密度流相似。额前风移线的其他特征…
AbstractThe objectives of this study are to determine the finescale characteristics of the wind and temperature fields associated with a prefrontal wind-shift line and to contrast them with those associated with a strong cold front. Data from a mobile, polarimetric, X-band, Doppler radar and from a surveillance S-band radar, temperature profiles retrieved from a thermodynamic sounder, and surface observations from the Oklahoma Mesonet are used to analyze a prefrontal wind-shift line in Oklahoma on 11 November 2013. Data from the same mobile radar and the Oklahoma Mesonet are used to identify the finescale characteristics of the wind field associated with a strong surface cold front in Oklahoma on 9 April 2013. It is shown that the prefrontal wind-shift line has a kinematic and thermodynamic structure similar to that of an intrusion (elevated density current), while the cold front has a kinematic structure similar to that of a classic density current. Other characteristics of the prefrontal wind-shift line...