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Formation of the low-latitude boundary layer and cusp under the northward IMF: simultaneous observations by cluster and double star

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Formation of the low-latitude boundary layer and cusp under the northward IMF: simultaneous observations by cluster and double star. / Bogdanova, Y. V.; Owen, C. J.; Dunlop, M. W. et al.
In: Journal of Geophysical Research, Vol. 113, No. A7, A07S07, 12.06.2008.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Harvard

Bogdanova, YV, Owen, CJ, Dunlop, MW, Wild, JA, Davies, JA, Lahiff, AD, Taylor, MGGT, Fazakerley, AN, Dandouras, I, Carr, CM, Lucek, EA & Rème, H 2008, 'Formation of the low-latitude boundary layer and cusp under the northward IMF: simultaneous observations by cluster and double star', Journal of Geophysical Research, vol. 113, no. A7, A07S07. https://doi.org/10.1029/2007JA012762

APA

Bogdanova, Y. V., Owen, C. J., Dunlop, M. W., Wild, J. A., Davies, J. A., Lahiff, A. D., Taylor, M. G. G. T., Fazakerley, A. N., Dandouras, I., Carr, C. M., Lucek, E. A., & Rème, H. (2008). Formation of the low-latitude boundary layer and cusp under the northward IMF: simultaneous observations by cluster and double star. Journal of Geophysical Research, 113(A7), Article A07S07. https://doi.org/10.1029/2007JA012762

Vancouver

Bogdanova YV, Owen CJ, Dunlop MW, Wild JA, Davies JA, Lahiff AD et al. Formation of the low-latitude boundary layer and cusp under the northward IMF: simultaneous observations by cluster and double star. Journal of Geophysical Research. 2008 Jun 12;113(A7):A07S07. doi: 10.1029/2007JA012762

Author

Bogdanova, Y. V. ; Owen, C. J. ; Dunlop, M. W. et al. / Formation of the low-latitude boundary layer and cusp under the northward IMF : simultaneous observations by cluster and double star. In: Journal of Geophysical Research. 2008 ; Vol. 113, No. A7.

Bibtex

@article{194644bef36440f1af25676758b3fdb0,
title = "Formation of the low-latitude boundary layer and cusp under the northward IMF: simultaneous observations by cluster and double star",
abstract = "On 28 February 2004 the configuration of the Cluster and Double Star TC1 satellites facilitated a simultaneous study of plasma properties inside the low-latitude boundary layer (LLBL) near the subsolar magnetopause and inside the midaltitude cusp during an interval with strong northward IMF. TC1, crossing the dayside magnetopause, observed a complex structure of boundary layers. We suggest that one part of the LLBL, characterized by high fluxes of magnetosheath-like electrons, is formed due to reconnection processes. We can identify three different plasma populations inside this region: on open field lines outside the magnetopause which are reconnected in the northern hemisphere lobe sector; on open field lines inside the magnetosphere which are reconnected in the northern hemisphere lobe sector and sink inside the magnetosphere; and on reclosed field lines, which undergo a second reconnection in the southern hemisphere lobe sector. Another part of the LLBL, characterized by equal fluxes of magnetosheath-like and plasma sheet populations, is formed by diffusion processes as strong pitch angle diffusion and formation of a loss cone are observed inside this region. Cluster, moving from the polar cap toward the dayside magnetosphere via the cusp region, crossed many different sublayers with different plasma properties. Comparison of plasma populations inside the different subregions of the LLBL and cusp shows that the complex LLBL observed at the dayside magnetopause maps into the midaltitude cleft/cusp region and that observed sublayers inside the cusp can be explained by reconnection in the lobe sector of one or both hemispheres and by diffusion processes.",
keywords = "Cluster, SuperDARN, Cusp, Reconnection",
author = "Bogdanova, {Y. V.} and Owen, {C. J.} and Dunlop, {M. W.} and Wild, {J. A.} and Davies, {J. A.} and Lahiff, {A. D.} and Taylor, {M. G. G. T.} and Fazakerley, {A. N.} and I. Dandouras and Carr, {C. M.} and Lucek, {E. A.} and H. R{\`e}me",
note = "Copyright (2008) American Geophysical Union. Further reproduction or electronic distribution is not permitted",
year = "2008",
month = jun,
day = "12",
doi = "10.1029/2007JA012762",
language = "English",
volume = "113",
journal = "Journal of Geophysical Research",
issn = "0148-0227",
publisher = "American Geophysical Union",
number = "A7",

}

RIS

TY - JOUR

T1 - Formation of the low-latitude boundary layer and cusp under the northward IMF

T2 - simultaneous observations by cluster and double star

AU - Bogdanova, Y. V.

AU - Owen, C. J.

AU - Dunlop, M. W.

AU - Wild, J. A.

AU - Davies, J. A.

AU - Lahiff, A. D.

AU - Taylor, M. G. G. T.

AU - Fazakerley, A. N.

AU - Dandouras, I.

AU - Carr, C. M.

AU - Lucek, E. A.

AU - Rème, H.

N1 - Copyright (2008) American Geophysical Union. Further reproduction or electronic distribution is not permitted

PY - 2008/6/12

Y1 - 2008/6/12

N2 - On 28 February 2004 the configuration of the Cluster and Double Star TC1 satellites facilitated a simultaneous study of plasma properties inside the low-latitude boundary layer (LLBL) near the subsolar magnetopause and inside the midaltitude cusp during an interval with strong northward IMF. TC1, crossing the dayside magnetopause, observed a complex structure of boundary layers. We suggest that one part of the LLBL, characterized by high fluxes of magnetosheath-like electrons, is formed due to reconnection processes. We can identify three different plasma populations inside this region: on open field lines outside the magnetopause which are reconnected in the northern hemisphere lobe sector; on open field lines inside the magnetosphere which are reconnected in the northern hemisphere lobe sector and sink inside the magnetosphere; and on reclosed field lines, which undergo a second reconnection in the southern hemisphere lobe sector. Another part of the LLBL, characterized by equal fluxes of magnetosheath-like and plasma sheet populations, is formed by diffusion processes as strong pitch angle diffusion and formation of a loss cone are observed inside this region. Cluster, moving from the polar cap toward the dayside magnetosphere via the cusp region, crossed many different sublayers with different plasma properties. Comparison of plasma populations inside the different subregions of the LLBL and cusp shows that the complex LLBL observed at the dayside magnetopause maps into the midaltitude cleft/cusp region and that observed sublayers inside the cusp can be explained by reconnection in the lobe sector of one or both hemispheres and by diffusion processes.

AB - On 28 February 2004 the configuration of the Cluster and Double Star TC1 satellites facilitated a simultaneous study of plasma properties inside the low-latitude boundary layer (LLBL) near the subsolar magnetopause and inside the midaltitude cusp during an interval with strong northward IMF. TC1, crossing the dayside magnetopause, observed a complex structure of boundary layers. We suggest that one part of the LLBL, characterized by high fluxes of magnetosheath-like electrons, is formed due to reconnection processes. We can identify three different plasma populations inside this region: on open field lines outside the magnetopause which are reconnected in the northern hemisphere lobe sector; on open field lines inside the magnetosphere which are reconnected in the northern hemisphere lobe sector and sink inside the magnetosphere; and on reclosed field lines, which undergo a second reconnection in the southern hemisphere lobe sector. Another part of the LLBL, characterized by equal fluxes of magnetosheath-like and plasma sheet populations, is formed by diffusion processes as strong pitch angle diffusion and formation of a loss cone are observed inside this region. Cluster, moving from the polar cap toward the dayside magnetosphere via the cusp region, crossed many different sublayers with different plasma properties. Comparison of plasma populations inside the different subregions of the LLBL and cusp shows that the complex LLBL observed at the dayside magnetopause maps into the midaltitude cleft/cusp region and that observed sublayers inside the cusp can be explained by reconnection in the lobe sector of one or both hemispheres and by diffusion processes.

KW - Cluster

KW - SuperDARN

KW - Cusp

KW - Reconnection

UR - http://www.scopus.com/inward/record.url?scp=68949084040&partnerID=8YFLogxK

U2 - 10.1029/2007JA012762

DO - 10.1029/2007JA012762

M3 - Journal article

VL - 113

JO - Journal of Geophysical Research

JF - Journal of Geophysical Research

SN - 0148-0227

IS - A7

M1 - A07S07

ER -