Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2020GL091527 |
Auroral Energy Flux and Joule Heating Derived from Global Maps of Field‐Aligned Currents | |
R. M. Robinson; L. J. Zanetti | |
2021-02-06 | |
发表期刊 | Geophysical Research Letters |
出版年 | 2021 |
英文摘要 | We calculate auroral energy flux and Joule heating in the high latitude ionosphere for 27 geomagnetically active days using two‐dimensional maps of field‐aligned currents determined by the Active Magnetosphere and Planetary Response Experiment (AMPERE). The energy input to the ionosphere due to Joule heating increases more rapidly with geomagnetic activity than that due to precipitating particles. The energy flux varies more smoothly with time than Joule heating, which is impulsive in nature on time scales from minutes to tens of minutes. These impulsive events correlate well with recoveries in the Sym‐H index, with the maximum correlation when compared to Sym‐H recoveries 70 minutes later. Because of prior studies that have associated transient recoveries of Sym‐H with substorm expansions, the delay found here suggests that dissipation of energy in the ionosphere occurs during the substorm growth phase prior to the release of magnetic energy caused by diversion of tail currents. |
领域 | 气候变化 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/313771 |
专题 | 气候变化 |
推荐引用方式 GB/T 7714 | R. M. Robinson,L. J. Zanetti. Auroral Energy Flux and Joule Heating Derived from Global Maps of Field‐Aligned Currents[J]. Geophysical Research Letters,2021. |
APA | R. M. Robinson,&L. J. Zanetti.(2021).Auroral Energy Flux and Joule Heating Derived from Global Maps of Field‐Aligned Currents.Geophysical Research Letters. |
MLA | R. M. Robinson,et al."Auroral Energy Flux and Joule Heating Derived from Global Maps of Field‐Aligned Currents".Geophysical Research Letters (2021). |
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