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首页> 外文期刊>Journal of Geophysical Research, D. Atmospheres: JGR >Lightning Evolution In Two North Central Florida Summer Multicell Storms and ThreeWinter/Spring Frontal Storms
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Lightning Evolution In Two North Central Florida Summer Multicell Storms and ThreeWinter/Spring Frontal Storms

机译：佛罗里达州北部北部夏季多尔风暴和三冬季/春季前风暴中的闪电演变

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摘要

We present the first lightning evolution studies, via the Lightning Mapping Array (LMA) and radar, performed in North Central Florida. Parts of three winter/spring frontal storms (cold season) and two complete summer (warm season) multicell storms are studied. Storm parameters measured are as follows: total number of flashes, flash-type classification, first flashes, flash initiation altitude, flash initiation power, flash rate (flashes per minute), charge structure, altitude and temperature ranges of the inferred charge regions, atmospheric isotherm altitude, radar base reflectivity (dBZ), and radar echo tops (EET). Several differences were found between summer multicell and winter/spring frontal storms in North Central Florida: (1) in winter/spring storms, the range of altitudes that all charge regions occupy is up to 1 km lower in altitude than in summer storms, as are the 0°C, ?10°C, and ?20°C isotherms; (2) lightning activity in summer storms is highly correlated with changes in radar signatures, in particular, echo tops; and (3) the LMA average initiation power of all flash types in winter/frontal storms is about an order of magnitude larger than that for summer storms. In relation to storms in other geographical locations, North Central Florida seasonal storms were found to have similarities in most parameters studied with a few differences, examples in Florida being (1) colder initiation altitudes for intracloud flashes, (2) charge regions occupying larger ranges of atmospheric temperatures, and (3) winter/spring frontal storms not having much lightning activity in the stratiform region.
机译：我们通过闪电映射阵列（LMA）和雷达在佛罗里达州北部进行，提供了第一个闪电演变研究。研究了三个冬季/春季正面风暴（寒冷季节）和两个完整的夏季（温暖的季节）多米尔暴风雨。测量的风暴参数如下：闪光灯总数，闪光型分类，第一闪光，闪光发起高度，闪光发起电源，闪光灯速率（每分钟闪烁），电荷结构，高度和温度范围的推断电荷区域，大气等温海拔，雷达基反射率（DBZ）和雷达回波顶部（EET）。夏季佛罗里达州中部夏季多尔和冬季/春季风暴之间发现了几种差异：（1）在冬季/春天的风暴中，所有费用区域占据的海拔高度在海拔高达1公里，而不是夏季风暴，如是0°C，？10°C，和20°C等温; （2）夏季风暴中的雷电活动与雷达签名的变化高度相关，特别是回声上衣; （3）冬季/正面风暴中所有闪光类型的LMA平均发起力大约比夏季风暴大的数量级。相对于在其他地理位置风暴，发现北佛罗里达中部季节性风暴具有与一些不同研究的大多数参数的相似性，在佛罗里达州存在的例子（1）更冷起始高度为云内闪烁，（2）电荷区占据较大的范围大气温度，（3）冬季/春季前雨层在层状区域中没有太大的闪电活动。

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