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DOI | 10.1029/2020JD033647 |
GPM-DPR Observations on TGFs Producing Storms | |
Tiberia A.; Porcú F.; Marisaldi M.; Tavani M.; Lapierre J.; Ursi A.; Fuschino F.; D'Adderio L.P.; Dietrich S. | |
发表日期 | 2021 |
ISSN | 2169897X |
卷号 | 126期号:8 |
英文摘要 | Unique spaceborne measurements of the three-dimensional structure of convective clouds producing terrestrial gamma ray flashes (TGFs) were performed using both active and passive microwave sensors on board the Global Precipitation Measurement (GPM)-Core Observatory satellite, finding coherent features for nine TGF-producing storms. The delineation of cloud structure using the radar reflectivity factor shows convective cells with significant vertical development and thick layers with high ice content. Compared to other cumulonimbus clouds in the tropics, the TGFs counterparts have higher reflectivity values above 3 and 8 km altitude showing in all cases a cumulonimbus tower and the TGFs locations are very close, or coincident, to these high Z columns, where reflectivity exceeds 50 dBz. Using the GPM Microwave Imager radiometer, most thunderstorms show a very strong depression of polarization corrected temperature (PCT) at channel 89 GHz, indicating a strong scattering signal by ice in the upper cloud layers. At channel 166 GHZ, the difference between vertical and horizontal brightness temperature signal always returns positive values, from 0.2 up to 13.7 K indicating a complex structure with randomly/vertically oriented ice particles. The PCT was used to characterize the analyzed storms in terms of hydrometeor types, confirming in 7/9 cases a high likelihood of hail/graupel presence. To perform analysis on the TGFs parent flashes, radio atmospherics data from the Earth Networks Total Lightning Network lightning network were used. Waveform data indicate that all cases are intra-cloud events and TGFs typically take place during the peak of flash rate production. Finally, the analysis of the most intense event is shown. © 2021. American Geophysical Union. All Rights Reserved. |
英文关键词 | DPR; GPM; lightning; microwave; TGF; thunderstorms |
语种 | 英语 |
来源期刊 | Journal of Geophysical Research: Atmospheres
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文献类型 | 期刊论文 |
条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/185302 |
作者单位 | Institute for Atmospheric Science and Climate, ISAC-CNR, Rome, Italy; Department of Physics and Astronomy, University of Bologna, Bologna, Italy; Birkeland Centre for Space Science, Department of Physics and Technology, University of Bergen, Bergen, Norway; INAF-IAPS, National Institute for Astrophysics, Rome, Italy; Earth Networks, Germantown, MD, United States; INAF-OAS, National Institute for Astrophysics, Bologna, Italy |
推荐引用方式 GB/T 7714 | Tiberia A.,Porcú F.,Marisaldi M.,et al. GPM-DPR Observations on TGFs Producing Storms[J],2021,126(8). |
APA | Tiberia A..,Porcú F..,Marisaldi M..,Tavani M..,Lapierre J..,...&Dietrich S..(2021).GPM-DPR Observations on TGFs Producing Storms.Journal of Geophysical Research: Atmospheres,126(8). |
MLA | Tiberia A.,et al."GPM-DPR Observations on TGFs Producing Storms".Journal of Geophysical Research: Atmospheres 126.8(2021). |
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