globalchange  > 气候减缓与适应
DOI: 10.1029/2017JA025155
Scopus记录号: 2-s2.0-85050792571
论文题名:
Effects of the Crustal Magnetic Fields and Changes in the IMF Orientation on the Magnetosphere of Mars: MAVEN Observations and LatHyS Results
作者: Romanelli N.; Modolo R.; Leblanc F.; Chaufray J.-Y.; Hess S.; Brain D.; Connerney J.; Halekas J.; Mcfadden J.; Jakosky B.
刊名: Journal of Geophysical Research: Space Physics
ISSN: 21699380
出版年: 2018
卷: 123, 期:7
起始页码: 5315
结束页码: 5333
语种: 英语
英文关键词: crustal magnetic field rotation ; IMF variability ; Martian magnetosphere ; planetary ion loss rates ; recovery timescles
英文摘要: The Mars Atmosphere and Volatile EvolutioN Mission (MAVEN) is currently probing the complex Martian environment. Although main structures arising from the interaction between the solar wind (SW) and the induced magnetosphere of Mars can be described using a steady state picture, time-dependent physical processes modify the response of this obstacle. These processes result from temporal variabilities in the internal and/or external electromagnetic fields and plasma properties. Indeed, the crustal magnetic fields (CF) rotation constantly modifies the intrinsic magnetic field topology relative to the SW. Moreover, the magnetosphere's state is also modified by changes in the interplanetary magnetic field (IMF). In this work we analyze MAVEN magnetic field and plasma measurements obtained on 23 December 2014, between 06:00 UT and 14:15 UT. These measurements suggest that the external conditions remained approximately constant when MAVEN was inside the magnetosphere during the first orbit. In contrast, MAVEN observed changes in the IMF orientation before visiting the magnetosphere during the second orbit. To investigate the response of the Martian plasma environment to the CF rotation and IMF variability, we also perform hybrid simulations, using MAVEN observations to set SW external conditions. Simulation results are compared with the MAVEN measurements and show good agreement. Associated recovery timescales of different magnetospheric regions are found to range between ∼ 10 s and ∼ 10 min. Finally, we do not observe large variability in the total planetary H+ and O+ escape rates at different times during this event, although a correlation between the latter and the CF location is identified. ©2018. American Geophysical Union. All Rights Reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113671
Appears in Collections:气候减缓与适应

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作者单位: Laboratoire Atmosphere, Milieux et Observations Spatiales (LATMOS), IPSL, CNRS, UVSQ, UPMC, Paris, France; LATMOS/IPSL, UPMC, Univ Paris06 Sorbonne Universités, UVSQ, CNRS, Paris, France; Office National d'Etudes et de Recherches Aérospatiales, Toulouse, France; Laboratory for Atmospheric and Space Physics, University of Colorado Boulder, Boulder, CO, United States; NASA Goddard Space Flight Center, Greenbelt, MD, United States; Department of Physics and Astronomy, University of Iowa, Iowa City, IA, United States; Space Sciences Laboratory, University of California, Berkeley, CA, United States

Recommended Citation:
Romanelli N.,Modolo R.,Leblanc F.,et al. Effects of the Crustal Magnetic Fields and Changes in the IMF Orientation on the Magnetosphere of Mars: MAVEN Observations and LatHyS Results[J]. Journal of Geophysical Research: Space Physics,2018-01-01,123(7)
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