Lightning Characteristics Associated With Storm Modes Observed During RELAMPAGO
Lightning Characteristics Associated With Storm Modes Observed During RELAMPAGO
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RELAMPAGO 期间观测到的与风暴模式相关的闪电特征
DOI：
10.1029/2023jd039520
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发表时间：
2024
期刊：
影响因子：
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通讯作者：
Medina, Bruno L.
中科院分区：
文献类型：
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作者：
Rocque, Marquette N.;Deierling, Wiebke;Rasmussen, Kristen L.;Albrecht, Rachel I.;Medina, Bruno L.
全球卫星研究显示，亚热带南美洲安第斯山脉下游的深对流和闪电最多。带自适应地面观测的带电、闪电和中/微尺度过程遥感(Relampago)野外活动旨在调查有助于阿根廷深对流和中尺度对流系统(MCSs)快速发展的物理过程。在阿根廷部署了一个闪电测绘阵列(LMA)，作为Relampago的一部分，以收集该区域极端风暴的闪电观测。这项研究将LMA和地球同步闪电映射器GOES-16上的闪电数据与1公里网格雷达数据相结合，以检查在Relampago期间观测到的各种对流风暴在其整个生命周期中的电特性。整个闪电活动的结果显示，48%的闪电与夜间沿科尔多瓦山脉(SDC)东部边缘发生的深对流有关。与层状闪电相比，这些闪电平均小65平方公里，层状闪电最频繁发生在SDC以东50-100公里处，与地形外MCS的高档增长一致。对12月13-14日MCS的分析表明，闪光率的急剧增加对应于具有高涡量和冰雹质量、35 dBz体积和冰水路径的深对流和宽对流中心。这项工作证实了以前对该区域闪电的卫星研究，但也提供了对流生命周期中较高的空间和时间分辨率信息，这在以前的研究中是无法获得的。
Global satellite studies show a maximum in deep convection and lightning downstream of the Andes in subtropical South America. The Remote sensing of Electrification, Lightning, And Mesoscale/microscale Processes with Adaptive Ground Observations (RELAMPAGO) field campaign was designed to investigate the physical processes that contribute to the rapid development of deep convection and mesoscale convective systems (MCSs) in Argentina. A lightning mapping array (LMA) was deployed to Argentina as part of RELAMPAGO to collect lightning observations from extreme storms in the region. This study combines lightning data from the LMA and the Geostationary Lightning Mapper onboardGOES‐16with 1‐km gridded radar data to examine the electrical characteristics of a variety of convective storms throughout their life cycle observed during RELAMPAGO. Results from the full campaign show 48% of flashes are associated with deep convection that occurs along the eastern edge of the Sierras de Córdoba (SDC) overnight. These flashes are 65 km2smaller on average compared to stratiform flashes, which occur most frequently 50–100 km east of the SDC in the early morning hours, consistent with the upscale growth of MCSs off the terrain. Analysis of the 13–14 December MCS shows that sharp increases in flash rates correspond to deep and wide convective cores that have high graupel and hail mass, 35‐dBZ volume, and ice water path. This work validates previous satellite studies of lightning in the region, but also provides higher spatial and temporal resolution information across the convective life cycle that has not been available in previous studies.