An efficient and positivity-preserving layer method for modeling   radiation belt diffusion processes

doi:10.1002/2015JA022064

CORC > 北京大学 > 地球与空间科学学院

	An efficient and positivity-preserving layer method for modeling radiation belt diffusion processes
	Tao, X. ; Zhang, L. ; Wang, C. ; Li, X. ; Albert, J. M. ; Chan, A. A.
刊名	JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
	2016
关键词	layer method monotone cubic interpolation radiation belt modeling bounce resonance magnetosonic waves NONLINEAR PARABOLIC EQUATIONS QUASI-LINEAR DIFFUSION PART I IMPLICIT RELATIVISTIC ELECTRONS SEMIIMPLICIT SCHEMES NUMERICAL-SIMULATION CUBIC INTERPOLATION DYNAMICS DIAGONALIZATION ACCELERATION
DOI	10.1002/2015JA022064
英文摘要	An efficient and positivity-preserving layer method is introduced to solve the radiation belt diffusion equation and is applied to study the bounce resonance interaction between relativistic electrons and magnetosonic waves. The layer method with linear interpolation, denoted by LM-L (layer method-linear), requires the use of a large number of grid points to ensure accurate solutions. We introduce a monotonicity- and positivity-preserving cubic interpolation method to be used with the Milstein-Tretyakov layer method. The resulting method, called LM-MC (layer method-monotone cubic), can be used to solve the radiation belt diffusion equation with a much smaller number of grid points than LM-L while still being able to preserve the positivity of the solution. We suggest that LM-MC can be used to study long-term dynamics of radiation belts. We then develop a 2-D LM-MC code and use it to investigate the bounce resonance diffusion of radiation belt electrons by magnetosonic waves. Using a previously published magnetosonic wave model, we demonstrate that bounce resonance with magnetosonic waves is as important as gyroresonance; both can cause several orders of magnitude increase of MeV electron fluxes within 1day. We conclude that bounce resonance with magnetosonic waves should be taken into consideration together with gyroresonance.; NSFC [41474142, 41421063]; CAS [KZZD-EW-01-4]; SCI(E); ARTICLE; xtao@ustc.edu.cn; 1; 305-320; 121
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/438927]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	Tao, X.,Zhang, L.,Wang, C.,et al. An efficient and positivity-preserving layer method for modeling radiation belt diffusion processes[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,2016.
APA	Tao, X.,Zhang, L.,Wang, C.,Li, X.,Albert, J. M.,&Chan, A. A..(2016).An efficient and positivity-preserving layer method for modeling radiation belt diffusion processes.JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS.
MLA	Tao, X.,et al."An efficient and positivity-preserving layer method for modeling radiation belt diffusion processes".JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS (2016).