当前位置: X-MOL 学术Geophys. Res. Lett. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Natural sources of ionization and their impact on atmospheric electricity
Geophysical Research Letters ( IF 5.2 ) Pub Date : 2020-06-18 , DOI: 10.1029/2020gl088619
K. Golubenko 1, 2 , E. Rozanov 3, 4 , I. Mironova 2 , A. Karagodin 2 , I. Usoskin 1, 5
Affiliation  

We present a study of atmospheric electricity using the chemistry-climate model SOCOL considering ionization by solar energetic particles during an extreme solar proton event (SPE), galactic cosmic rays (GCR), and terrestrial radon (Rn-222). We calculate the global distribution of the atmospheric conductivity and fair-weather downward current density (Jz) using atmospheric ionization rates from all sources. We found that Jz is enhanced (by more than 3.5 pA/m2) in radon source and polar regions. Contribution of Rn-222 is essential at middle and low latitudes/altitudes where GCR-induced air conductivity is reduced. The model results are in good agreement with the available observations. We also studied the effects of an extreme SPE, corresponding to the 774 AD event, on the atmospheric electricity and found that it would lead to a large increase of Jz on a global scale. The magnitude of the effects depends on location and can exceed background value more than 30 times over the high latitudes (a conservative upper bound). Such an assessment has been performed for the first time.

中文翻译:

电离的天然来源及其对大气电的影响

我们使用化学-气候模型 SOCOL 研究大气电,该模型考虑了极端太阳质子事件 (SPE)、银河宇宙射线 (GCR) 和地球氡 (Rn-222) 期间太阳高能粒子的电离。我们使用来自所有来源的大气电离率计算大气电导率和晴天向下电流密度 (Jz) 的全球分布。我们发现氡源和极地区域的 Jz 增强(超过 3.5 pA/m2)。Rn-222 的贡献在 GCR 引起的空气传导率降低的中低纬度/海拔地区至关重要。模型结果与可用的观察结果非常吻合。我们还研究了极端 SPE 的影响,对应于 774 AD 事件,并发现这将导致全球范围内 Jz 的大量增加。影响的大小取决于位置,在高纬度地区可能超过背景值 30 倍以上(保守的上限)。这种评估是第一次进行。
更新日期:2020-06-18
down
wechat
bug