@article{Hietala:2014:10.1002/2014GL059551,
author = {Hietala, H and Kilpua, EKJ and Turner, DL and Angelopoulos, V},
doi = {10.1002/2014GL059551},
journal = {Geophysical Research Letters},
pages = {2258--2265},
title = {Depleting effects of ICME-driven sheath regions on the outer electron radiation belt},
url = {http://dx.doi.org/10.1002/2014GL059551},
volume = {41},
year = {2014}
}

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TY  - JOUR
AB  - We study the effect of interplanetary coronal mass ejection (ICME)driven sheath regions on relativistic outer radiation belt electron fluxes. We employ superposed epoch analysis, and, unlike previous studies, we segregate the sheath from the ejecta. We find that sheaths typically result in more than an order of magnitude decrease in the relativistic electron fluxes and that the fluxes stay below the preevent level for more than 2 days after the sheath passage. The electron depletions are stronger for sheaths that exhibit higher power in magnetic and dynamic pressure fluctuations in the ultralow frequency range and cause larger magnetospheric compressions. Depletions are even stronger for sheaths that encompass the entire storm main phase. Our findings suggest that sheaths are effective at depleting the electron fluxes because they increase radial diffusion under magnetospheric compression conditions, thereby enhancing magnetopause shadowing losses, particularly when the Dst effect can act in concert.
AU  - Hietala,H
AU  - Kilpua,EKJ
AU  - Turner,DL
AU  - Angelopoulos,V
DO  - 10.1002/2014GL059551
EP  - 2265
PY  - 2014///
SN  - 0094-8276
SP  - 2258
TI  - Depleting effects of ICME-driven sheath regions on the outer electron radiation belt
T2  - Geophysical Research Letters
UR  - http://dx.doi.org/10.1002/2014GL059551
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000334983000004&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - https://agupubs.onlinelibrary.wiley.com/doi/full/10.1002/2014GL059551
VL  - 41
ER  - 

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