Unknown

Dataset Information

0

Explicit IMF B y -Dependence of Energetic Protons and the Ring Current.


ABSTRACT: The most important parameter driving the solar wind-magnetosphere interaction is the southward (B z ) component of the interplanetary magnetic field (IMF). While the dawn-dusk (B y ) component of the IMF is also known to play an important role, its effects are usually assumed to be independent of its sign. Here we demonstrate for the first time a seasonally varying, explicit IMF B y -dependence of the ring current and Dst index. Using satellite observations and a global magnetohydrodynamic model coupled with a ring current model, we show that for a fixed level of solar wind driving the flux of energetic magnetospheric protons and the growth-rate of the ring current are greater for B y  < 0 (B y  > 0) than for B y  > 0 (B y  < 0) in Northern Hemisphere summer (winter). While the physical mechanism of this explicit B y -effect is not yet fully understood, our results suggest that IMF B y modulates magnetospheric convection and plasma transport in the inner magnetosphere.

SUBMITTER: Holappa L 

PROVIDER: S-EPMC9286478 | biostudies-literature |

REPOSITORIES: biostudies-literature

Similar Datasets

| S-EPMC11251602 | biostudies-literature
| S-EPMC7004439 | biostudies-literature
| S-EPMC8279132 | biostudies-literature
| S-EPMC2728797 | biostudies-literature
| S-EPMC6934566 | biostudies-literature
| S-EPMC7901171 | biostudies-literature
| S-EPMC5482891 | biostudies-literature
| S-EPMC5871778 | biostudies-literature
| S-EPMC6360953 | biostudies-literature
| S-EPMC3377936 | biostudies-literature