Near-Earth plasma sheet boundary dynamics during substorm dipolarization

Nakamura, Rumi; Nagai, Tsugunobu; Birn, Joachim; Sergeev, Victor A.; Le Contel, Olivier; Varsani, Ali; Baumjohann, Wolfgang; Nakamura, Takuma; Apatenkov, Sergey; Artemyev, Anton; Ergun, Robert E.; Fuselier, Stephen A.; Gershman, Daniel J.; Giles, Barbara J.; Khotyaintsev, Yuri V.; Lindqvist, Per-Arne; Magnes, Werner; Mauk, Barry; Russell, Christopher T.; Singer, Howard J.; Stawarz, Julia; Strangeway, Robert J.; Anderson, Brian; Bromund, Ken R.; Fischer, David; Kepko, Laurence; Le, Guan; Plaschke, Ferdinand; Slavin, James A.; Cohen, Ian; Jaynes, Allison; Turner, Drew L.

doi:10.1186/s40623-017-0707-2

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The NOAA IR serves as an archival repository of NOAA-published products including scientific findings, journal articles, guidelines, recommendations, or other information authored or co-authored by NOAA or funded partners. As a repository, the NOAA IR retains documents in their original published format to ensure public access to scientific information.

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Near-Earth plasma sheet boundary dynamics during substorm dipolarization

2017
By Nakamura, Rumi ; Nagai, Tsugunobu ; Birn, Joachim ; ...
Source: Earth Planets Space. 2017;69(1):129.

[PDF-3.40 MB]

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Journal Title:

Earth, Planets and Space
Personal Author:

Nakamura, Rumi ; Nagai, Tsugunobu ; Birn, Joachim ; Sergeev, Victor A. ; Le Contel, Olivier ; ... More +

Nakamura, Rumi ; Nagai, Tsugunobu ; Birn, Joachim ; Sergeev, Victor A. ; Le Contel, Olivier ; Varsani, Ali ; Baumjohann, Wolfgang ; Nakamura, Takuma ; Apatenkov, Sergey ; Artemyev, Anton ; Ergun, Robert E. ; Fuselier, Stephen A. ; Gershman, Daniel J. ; Giles, Barbara J. ; Khotyaintsev, Yuri V. ; Lindqvist, Per-Arne ; Magnes, Werner ; Mauk, Barry ; Russell, Christopher T. ; Singer, Howard J. ; Stawarz, Julia ; Strangeway, Robert J. ; Anderson, Brian ; Bromund, Ken R. ; Fischer, David ; Kepko, Laurence ; Le, Guan ; Plaschke, Ferdinand ; Slavin, James A. ; Cohen, Ian ; Jaynes, Allison ; Turner, Drew L. Less -
NOAA Program & Office:

NWS (National Weather Service) ; SWPC (Space Weather Prediction Center)

NWS (National Weather Service) ; SWPC (Space Weather Prediction Center) Less -
Description:

We report on the large-scale evolution of dipolarization in the near-Earth plasma sheet during an intense (AL ~ −1000 nT) substorm on August 10, 2016, when multiple spacecraft at radial distances between 4 and 15 R E were present in the night-side magnetosphere. This global dipolarization consisted of multiple short-timescale (a couple of minutes) B z disturbances detected by spacecraft distributed over 9 MLT, consistent with the large-scale substorm current wedge observed by ground-based magnetometers. The four spacecraft of the Magnetospheric Multiscale were located in the southern hemisphere plasma sheet and observed fast flow disturbances associated with this dipolarization. The high-time-resolution measurements from MMS enable us to detect the rapid motion of the field structures and flow disturbances separately. A distinct pattern of the flow and field disturbance near the plasma boundaries was found. We suggest that a vortex motion created around the localized flows resulted in another field-aligned current system at the off-equatorial side of the BBF-associated R1/R2 systems, as was predicted by the MHD simulation of a localized reconnection jet. The observations by GOES and Geotail, which were located in the opposite hemisphere and local time, support this view. We demonstrate that the processes of both Earthward flow braking and of accumulated magnetic flux evolving tailward also control the dynamics in the boundary region of the near-Earth plasma sheet.
Keywords:

[+]

Magnetic fields
Source:

Earth Planets Space. 2017;69(1):129.
DOI:

https://doi.org/10.1186/s40623-017-0707-2
Pubmed ID:

32009832
Pubmed Central ID:

PMC6961498
Document Type:

Journal Article
Rights Information:

CC BY
Compliance:

PMC
Main Document Checksum:

[+]

urn:sha256:3b374ffbf3e37924b6714eea4f19a42f1dd0cd55aa3ffe6d219dcb05762ab817
Download URL:

https://repository.library.noaa.gov/view/noaa/26221/noaa_26221_DS1.pdf
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Near-Earth plasma sheet boundary dynamics during substorm dipolarization

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