Effect of wave-particle interactions on ring current evolution for January 10-11, 1997: Initial results
Abstract
We simulate the ring current evolution during the magnetic storm caused by Earth passage of the January 1997 magnetic cloud. Compared to previous studies, we include for the first time energy diffusion caused by wave-particle interactions. The modeled Dst index agrees reasonably well with the measured one, corrected for magnetopause currents and currents induced in the solid Earth. We compare H+distributions calculated from our model with those measured by the HYDRA instrument on the POLAR spacecraft and find that: a) the agreement between theory and data at large Lshells (L>5.5) is very good; b) although the agreement at low Lshells is improved when scattering by EMIC waves is included, the result is not entirely satisfactory, suggesting that either transport in a more realistic magnetospheric electric field or additional loss processes should be considered.
Publication Date
8-1-1998
Journal Title
Geophysical Research Letters
Publisher
AGU
Digital Object Identifier (DOI)
Document Type
Article
Recommended Citation
Jordanova, VK; Farrugia, CJ; Quinn, JM; Thorne, RM; Ogilvie, KW; Lepping, RP; Lu, G; Lazarus, AJ; Thomsen, MF; Belian, RD (1998). Effect of wave-particle interactions on ring current evolution for January 10-11, 1997: Initial results, GEOPHYSICAL RESEARCH LETTERS. Vol. 25, No. 15, 2971-2974. DOI: 10.1029/98GL00649