On the performance of global magnetohydrodynamic models in the Earth's magnetosphere
On the performance of global magnetohydrodynamic models in the Earth's magnetosphere
复制标题
全球磁流体动力学模型在地球磁层中的性能
DOI:
10.1002/swe.20055
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发表时间:
2013
期刊:
影响因子:
3.7
通讯作者:
Honkonen I
中科院分区:
文献类型:
--
作者:
Honkonen I
We study the performance of four magnetohydrodynamic models (BATS‐R‐US, GUMICS, LFM, OpenGGCM) in the Earth's magnetosphere. Using the Community Coordinated Modeling Center's Run‐on‐Request system, we compare model predictions with magnetic field measurements of the Cluster, Geotail and Wind spacecraft during a multiple substorm event. We also compare model cross polar cap potential results to those obtained from the Super Dual Auroral Radar Network (SuperDARN) and the model magnetopause standoff distances to an empirical magnetopause model. The correlation coefficient (CC) and prediction efficiency (PE) metrics are used to objectively evaluate model performance quantitatively. For all four models, the best performance outside geosynchronous orbit is found on the dayside. Generally, the performance of models decreases steadily downstream from the Earth. On the dayside most CCs are above 0.5 with CCs for Bxand Bzclose to 0.9 for three out of four models. In the magnetotail at a distance of about −130 Earth radii from Earth, the prediction efficiency of all models is below that of using an average value for the prediction with the exception of Bz. Bxis most often best predicted and correlated both on the dayside and the nightside close to the Earth whereas in the far tail the CC and PE for Bzare substantially higher than other components in all models. We also find that increasing the resolution or coupling an additional physics module does not automatically increase the model performance in the magnetosphere.
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影响因子:
1.9
作者:
A. Viljanen;E. Tanskanen;A. Pulkkinen
通讯作者:
A. Pulkkinen
DOI:
10.1016/j.cpc.2012.12.017
发表时间:
2012
期刊:
ArXiv
影响因子:
--
作者:
I. Honkonen;S. Alfthan;A. Sandroos;P. Janhunen;M. Palmroth
通讯作者:
M. Palmroth
影响因子:
3.7
作者:
L. Rastätter;M. Kuznetsova;A. Vapirev;A. Ridley;M. Wiltberger;A. Pulkkinen;M. Hesse;H. Singer
通讯作者:
H. Singer
DOI:
--
发表时间:
2011
期刊:
影响因子:
--
作者:
A. Pulkkinen;M. Kuznetsova;A. Ridley;J. Raeder;A. Vapirev;D. Weimer;R. Weigel;M. Wiltberger;G. Millward;L. Rastätter;M. Hesse;H. Singer;A. Chulaki
通讯作者:
A. Chulaki
影响因子:
3.7
作者:
E. Krausmann;V. Bothmer
通讯作者:
V. Bothmer