Magnetospheric Flux Throughput in the Dungey Cycle: Identification of Convection State During 2010

Magnetospheric Flux Throughput in the Dungey Cycle: Identification of Convection State During 2010
复制标题

Dungey 循环中的磁层通量吞吐量:2010 年期间对流状态的识别

DOI:
10.1029/2020ja028437
复制
发表时间:
2021
期刊:
Space Physics
影响因子:
--
通讯作者:
Milan S
Milan S
中科院分区:
--
文献类型:
--
作者:
Milan S

文献摘要

参考文献

被引文献

相似文献

我们量化了2010年不同对流态对磁层磁通量吞吐量的贡献。为此,我们根据太阳风和行星际磁场、地磁指数以及由活动磁层和行星电动力学响应实验测量的场向电流的观测结果,提供了2010年期间对流状态的连续分类。对流状态被定义为(1)平静,(2)弱活动,(3)亚暴(3)增长,(4)扩张和(5)恢复阶段,(6)亚风暴驱动阶段(当发生相对稳定的磁层对流),(7)恢复湾(当恢复阶段伴随着AL电喷流指数的负漂移),和(8)多重加强时期(当持续的短周期AL活动发生的风暴时间段)。磁层有46%的时间是安静的,这时发生的对流很少。大部分对流发生在增长和驱动阶段(分别占白天重联开放磁通量积累的21%和38%)。我们在对流的膨胀/收缩极帽模型的背景下讨论了这些结果,并描述了一个框架,在该框架内可以理解在更连续的太阳风-磁层驱动期间孤立的亚暴和扰动。
We quantify the contributions of different convection states to the magnetic flux throughput of the magnetosphere during 2010. To do this we provide a continuous classification of convection state for the duration of 2010 based upon observations of the solar wind and interplanetary magnetic field, geomagnetic indices, and field‐aligned currents measured by the Active Magnetosphere and Planetary Electrodynamics Response Experiment. Convection states are defined as (1) quiet, (2) weak activity, substorm (3) growth, (4) expansion and (5) recovery phases, (6) substorm driven phase (when relatively steady magnetospheric convection occurs), (7) recovery bays (when recovery phase is accompanied by a negative excursion of the AL electrojet index), and (8) periods of multiple intensifications (storm‐time periods when continuous short‐period AL activity occur). The magnetosphere is quiet for 46% of the time, when very little convection takes place. The majority of convection occurs during growth and driven phases (21% and 38%, respectively, of open magnetic flux accumulation by dayside reconnection). We discuss these results in the context of the expanding/contracting polar cap model of convection, and describe a framework within which isolated substorms and disturbances during periods of more continuous solar wind‐magnetosphere driving can be understood.
DOI: --
发表时间: 1979
期刊:
影响因子: --
作者:
O. Troshichev;N. Dmitrieva;B. Kuznetsov
通讯作者: B. Kuznetsov
DOI: 10.1002/2015ja021343
发表时间: 2015-12
期刊: Journal of Geophysical Research: Space Physics
影响因子: --
作者:
C. Forsyth;I. J. Rae;J. Coxon;M. Freeman;C. Jackman;Jesper Gjerloev;Jesper Gjerloev;A. Fazakerley
通讯作者: C. Forsyth;I. J. Rae;J. Coxon;M. Freeman;C. Jackman;Jesper Gjerloev;Jesper Gjerloev;A. Fazakerley
DOI: 10.1029/2019ja027559
发表时间: 2019-11
期刊: Journal of Geophysical Research: Space Physics
影响因子: --
作者:
J. Haiducek;D. Welling;S. Morley;N. Ganushkina;X. Chu
通讯作者: J. Haiducek;D. Welling;S. Morley;N. Ganushkina;X. Chu
DOI: --
发表时间: 2013
期刊:
影响因子: --
作者:
L. Clausen;S. Milan;J. Baker;J. Ruohoniemi;K. Glassmeier;J. Coxon;B. Anderson
通讯作者: B. Anderson
稳定磁层对流事件:稳定性有多重要?
DOI: --
发表时间: 2014
期刊:
影响因子: --
作者:
A. DeJong
通讯作者: A. DeJong