Exploring the global thunderstorm influence on the fair weather electric field in Buenos Aires

Exploring the global thunderstorm influence on the fair weather electric field in Buenos Aires
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探讨全球雷暴对布宜诺斯艾利斯晴天电场的影响

DOI:
10.1016/j.atmosres.2023.107182
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发表时间:
2024
影响因子:
5.5
通讯作者:
Velazquez Y
Velazquez Y
中科院分区:
地球科学1区
文献类型:
--
作者:
Velazquez Y

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全球大气电路(GEC)维持着晴天(FW)电场或电位梯度(PG)。在这篇文章中,我们分析了2017年至2021年期间在阿根廷布宜诺斯艾利斯国防科学技术研究所(CITEDEF)记录的PG测量值,以计算每日PG(FW)曲线,并检查当地PG测量值是否捕获GEC信号。为了支持未来的共同方法,不依赖于气象数据的FW识别-因此,援助相互比较,我们依靠以前开发的统计方法,提出一个FW选择的基础上,从中位数的数据系列的绝对偏差。使用这种方法,我们过滤FW天,并表明,当地PG(FW)曲线具有显着的相关性0.83与卡内基曲线。为了测试当地每日PG(FW)曲线捕捉全球雷暴信号的程度,使用雷霆小时数据库(http://www.example.com)的数据计算了全球和区域尺度的雷暴面积。thunderhours.earthnetworks.com PG(FW)曲线与全球雷暴面积的年和季度平均日变化有很好的相关性。此外,AERONET网络和温度观测的气溶胶光学厚度(AOD)测量值的分析有助于得出这样的结论,即当地的影响,如污染附近的高速公路并不占主导地位的PG(FW)曲线的行为。这两项分析都使我们得出结论,可以在布宜诺斯艾利斯检测到GEC信号。
The Global atmospheric Electric Circuit (GEC) sustains the fair weather (FW) electric field, or potential gradient (PG). In this article, we analyze PG measurements recorded between 2017 and 2021 at the Instituto de Investigaciones Científicas y Técnicas para la Defensa (CITEDEF) in Buenos Aires, Argentina, to calculate the daily PG (FW) curve and examine whether local PG measurements capture the GEC signal. With the aim of supporting future common methodologies that do not rely on meteorological data for FW identification - and hence aid inter-comparisons, we rely on previously developed statistical methodologies to propose a FW selection based on the absolute deviation from the median of the data series. Using this methodology we filtered FW days and showed that the local PG (FW) curve had a significant correlation of 0.83 with the Carnegie curve. In order to test the extent to which the local daily PG (FW) curve captures the global thunderstorm signal, the area of thunderstorms was calculated at both global and regional scales using data from the Thunder Hour Database (http://thunderhours.earthnetworks.com). The PG (FW) curve was shown to have a good correlation with the daily median variation of the global thunderstorm area on both annual and quarterly scales. Additionally, the analysis of coincident aerosol optical thickness (AOD) measurements by the AERONET network and temperature observations helped to conclude that local effects such as pollution from a near highway are not dominating the PG (FW) curve behaviour. Both analyses allowed us to conclude that the GEC signal can be detected in Buenos Aires.
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