Ruilong Zhang, Libo Liu, Xinan Yue, Jiaojiao Zhang, Ning Zhang, Yiding Chen, Huijun Le, Wenbo Li
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引用次数: 0
Abstract
We used the incoherent scatter radar observations at Sanya (18.3°N, 109.6°E) and Jicamarca (11.9°S, 76.9°W) to analyze the day-night difference of penetration electric fields during the 10 May 2024 superstorm. The dawn-dusk electric field penetrated into the night ionosphere more efficiency, and the night-to-day penetration ratio was ∼2. Specially, the zonal electric field became westward in the post-midnight, while it did not change significantly in the afternoon in response to the IMF-Bz southward turning at 17:45–18:25 UT and 19:30–22:30 UT. These indicated that the penetration electric field was rapidly and long-lastingly canceled by shielding electric field, which had rarely been reported. In this period, the enhanced Region-2 field-aligned current shifted to mid-latitudes and the enhanced sunward convection penetrated to low-latitudes, indicating the shielding layer might closely move to Earth. Under this condition, the shielding layer would promptly reconfigure to cancel the penetration electric field and lead to the perfect shielding.
期刊介绍：
Geophysical Research Letters (GRL) publishes high-impact, innovative, and timely research on major scientific advances in all the major geoscience disciplines. Papers are communications-length articles and should have broad and immediate implications in their discipline or across the geosciences. GRLmaintains the fastest turn-around of all high-impact publications in the geosciences and works closely with authors to ensure broad visibility of top papers.
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