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Forbush Decrease Characteristics in a Magnetic Cloud
Space Weather ( IF 4.288 ) Pub Date : 2020-11-21 , DOI: 10.1029/2020sw002616
A. S. Petukhova 1 , I. S. Petukhov 1 , S. I. Petukhov 1
Affiliation  

Based on the new mechanism, the Forbush decrease characteristics are calculated for eight magnetic cloud types. It is shown that the Forbush decrease amplitude does not depend on the magnetic cloud type, while the anisotropy strongly does. The Forbush decrease spectrum for (2–150 GV) rigidities is calculated for the first time. The Forbush decrease amplitude for low rigidities is 100%, which can be explained by a large number of forbidden particle trajectories. The Forbush decrease amplitude rapidly decreases for high rigidities due to the geometric condition. Comparing the calculated Forbush decrease characteristics with measurements for two events shows that the Forbush decrease amplitudes agree with the measurements quantitatively, and the anisotropies do qualitatively.

中文翻译:

磁云中的前冲下降特性

基于新机制,针对八种磁云类型计算了Forbush减少特征。结果表明,Forbush减小幅度与磁云类型无关,而各向异性则与之相关。首次计算了(2-150)GV刚度的Forbush降低谱。低刚度的Forbush减小幅度约为100%,这可以用大量的禁止粒子轨迹来解释。对于高刚度,由于几何条件,Forbush减小幅度迅速减小。将计算出的Forbush减少特征与两个事件的测量结果进行比较表明,Forbush减少幅度与测量结果在数量上一致,并且各向异性在定性上也确实如此。
更新日期:2020-12-04
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