@InProceedings{ErickssonSouzCass:2018:SoAmMo,
author = "Ericksson, Stefan and Souza, Vitor Moura Cardoso e Silva and
Cassak, Paul",
affiliation = "{Laboratory for Atmospheric and Space Physics} and {Instituto
Nacional de Pesquisas Espaciais (INPE)} and {West Virginia
University}",
title = "South America monsoon system and features simulated by the Eta
regional model",
year = "2018",
organization = "AGU Fall Meeting",
keywords = "Tripolar BM perturbations across dayside magnetopause exhausts –
comparing THEMIS multi-spacecraft observations and PIC
simulations.",
abstract = "THEMIS occasionally show evidence of tripolar perturbations of the
out-of-plane (guide) magnetic field across reconnection exhausts
at the dayside magnetopause. This type of guide field signature
may indicate a presence of magnetic flux ropes that form between
two active reconnection X-lines. We examined the 3-s cadence of
THEMIS ion velocity distributions in the field
parallel-perpendicular plane across these types of reconnection
exhausts. The survey resulted in a clear evidence of two
counter-streaming magnetosheath ion populations in at least 30% of
tripolar events. The same type of bi-streaming ions were observed
when THEMIS A,D,E confirmed a case of converging ion exhausts at
the dayside magnetopause. A particle-in-cell (PIC) simulation for
asymmetric magnetopause conditions confirm the presence of two
counter-streaming ion populations within a magnetic island that
formed between two X-lines. The time-dependent ion particle
trajectories clearly show how the two ion populations originated
in the upstream magnetosheath and reached the same region of two
converging exhausts from the two adjacent reconnection X-lines.",
conference-location = "Washington, D. C.",
conference-year = "10-14 dec.",
language = "en",
urlaccessdate = "04 maio 2024"
}