Research output: Contribution to journal › Article › peer-review
Substorm-Related Near-Earth Reconnection Surge : Combining Telescopic and Microscopic Views. / Sergeev, V. A.; Apatenkov, S. V.; Nakamura, R.; Baumjohann, W.; Khotyaintsev, Y. V.; Kauristie, K.; van de Kamp, M.; Burch, J. L.; Ergun, R. E.; Lindqvist, P. A.; Torbert, R.; Russell, C. T.; Giles, B. L.
In: Geophysical Research Letters, Vol. 46, No. 12, 28.06.2019, p. 6239-6247.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Substorm-Related Near-Earth Reconnection Surge
T2 - Combining Telescopic and Microscopic Views
AU - Sergeev, V. A.
AU - Apatenkov, S. V.
AU - Nakamura, R.
AU - Baumjohann, W.
AU - Khotyaintsev, Y. V.
AU - Kauristie, K.
AU - van de Kamp, M.
AU - Burch, J. L.
AU - Ergun, R. E.
AU - Lindqvist, P. A.
AU - Torbert, R.
AU - Russell, C. T.
AU - Giles, B. L.
PY - 2019/6/28
Y1 - 2019/6/28
N2 - A strong ~11-min-long surge of the lobe reconnection was observed during a substorm on the tailward side of the near-Earth neutral line. In the southern lobe near the reconnection separatrix the MMS spacecraft observed short-duration earthward electron beams providing the local Hall current, tailward propagating Alfven wave (AW) bursts with Poynting flux up to 10−4 W/m2, and large-amplitude E field spikes (e-holes) and low hybrid waves. The reconnection surge was accompanied by substorm current wedge formation and fast poleward expansion of auroral bulge-related westward electrojet in the conjugate ionosphere. During its meridional crossing above the expanding bulge the Metop-2 spacecraft observed an intense energetic precipitation spike near the expected X line foot point and confirmed the dipolarized character of magnetic field lines inside of the bulge. Globally the observed average reconnection rate (<Ey > ~3.3 mV/m) was sufficient to produce the magnetic flux increase in the bulge, associated with observed fast poleward expansion (about 6° latitude in 5 min).
AB - A strong ~11-min-long surge of the lobe reconnection was observed during a substorm on the tailward side of the near-Earth neutral line. In the southern lobe near the reconnection separatrix the MMS spacecraft observed short-duration earthward electron beams providing the local Hall current, tailward propagating Alfven wave (AW) bursts with Poynting flux up to 10−4 W/m2, and large-amplitude E field spikes (e-holes) and low hybrid waves. The reconnection surge was accompanied by substorm current wedge formation and fast poleward expansion of auroral bulge-related westward electrojet in the conjugate ionosphere. During its meridional crossing above the expanding bulge the Metop-2 spacecraft observed an intense energetic precipitation spike near the expected X line foot point and confirmed the dipolarized character of magnetic field lines inside of the bulge. Globally the observed average reconnection rate (<Ey > ~3.3 mV/m) was sufficient to produce the magnetic flux increase in the bulge, associated with observed fast poleward expansion (about 6° latitude in 5 min).
KW - magnetic reconnection
KW - magnetotail
KW - plasma sheet
KW - poleward expansion
KW - precipitation
KW - substorms
KW - MAGNETOSPHERIC MULTISCALE
KW - ACCELERATION
KW - MODEL
KW - SHEET
UR - http://www.scopus.com/inward/record.url?scp=85068169133&partnerID=8YFLogxK
U2 - 10.1029/2019GL083057
DO - 10.1029/2019GL083057
M3 - Article
AN - SCOPUS:85068169133
VL - 46
SP - 6239
EP - 6247
JO - Geophysical Research Letters
JF - Geophysical Research Letters
SN - 0094-8276
IS - 12
ER -
ID: 43970680