Coordinated optical and EISCAT observations of black aurora

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Coordinated optical and EISCAT observations of black aurora. / Blixt, E. M.; Kosch, M. J.
In: Geophysical Research Letters, Vol. 31, No. 6, L06813, 03.2004.

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Harvard

Blixt, EM & Kosch, MJ 2004, 'Coordinated optical and EISCAT observations of black aurora', Geophysical Research Letters, vol. 31, no. 6, L06813. https://doi.org/10.1029/2003GL019244

APA

Blixt, E. M., & Kosch, M. J. (2004). Coordinated optical and EISCAT observations of black aurora. Geophysical Research Letters, 31(6), Article L06813. https://doi.org/10.1029/2003GL019244

Vancouver

Blixt EM, Kosch MJ. Coordinated optical and EISCAT observations of black aurora. Geophysical Research Letters. 2004 Mar;31(6):L06813. doi: 10.1029/2003GL019244

Author

Blixt, E. M. ; Kosch, M. J. / Coordinated optical and EISCAT observations of black aurora. In: Geophysical Research Letters. 2004 ; Vol. 31, No. 6.

Bibtex

@article{05dd4b2d4f0d472bad59ac7125e4f42e,

title = "Coordinated optical and EISCAT observations of black aurora",

abstract = "An image intensified video camera was used in conjunction with the EISCAT radar in Troms{\o}, Norway, for detailed studies of non-sheared black aurora on March 5, 2002. While it is known that a downward field-aligned current will decrease the ionospheric plasma density, any measurable effect will depend on the noise-level in the density measurements and the background density. The results show that the plasma density is not reduced in the regions of black aurora, which shows that if a downward current existed within the black aurora, it must be less than ∼0.6 μA/m2. Combining this result with recent findings that small scale currents are generally strong, that the downward currents are associated with intense diverging electric fields, and that the observed black arcs show no signs of shear motion, it is concluded that the non-sheared black aurora is not associated with any significant downward field-aligned current.",

author = "Blixt, {E. M.} and Kosch, {M. J.}",

year = "2004",

month = mar,

doi = "10.1029/2003GL019244",

language = "English",

volume = "31",

journal = "Geophysical Research Letters",

issn = "0094-8276",

publisher = "John Wiley & Sons, Ltd",

number = "6",

}

RIS

TY - JOUR

T1 - Coordinated optical and EISCAT observations of black aurora

AU - Blixt, E. M.

AU - Kosch, M. J.

PY - 2004/3

Y1 - 2004/3

N2 - An image intensified video camera was used in conjunction with the EISCAT radar in Tromsø, Norway, for detailed studies of non-sheared black aurora on March 5, 2002. While it is known that a downward field-aligned current will decrease the ionospheric plasma density, any measurable effect will depend on the noise-level in the density measurements and the background density. The results show that the plasma density is not reduced in the regions of black aurora, which shows that if a downward current existed within the black aurora, it must be less than ∼0.6 μA/m2. Combining this result with recent findings that small scale currents are generally strong, that the downward currents are associated with intense diverging electric fields, and that the observed black arcs show no signs of shear motion, it is concluded that the non-sheared black aurora is not associated with any significant downward field-aligned current.

AB - An image intensified video camera was used in conjunction with the EISCAT radar in Tromsø, Norway, for detailed studies of non-sheared black aurora on March 5, 2002. While it is known that a downward field-aligned current will decrease the ionospheric plasma density, any measurable effect will depend on the noise-level in the density measurements and the background density. The results show that the plasma density is not reduced in the regions of black aurora, which shows that if a downward current existed within the black aurora, it must be less than ∼0.6 μA/m2. Combining this result with recent findings that small scale currents are generally strong, that the downward currents are associated with intense diverging electric fields, and that the observed black arcs show no signs of shear motion, it is concluded that the non-sheared black aurora is not associated with any significant downward field-aligned current.

U2 - 10.1029/2003GL019244

DO - 10.1029/2003GL019244

M3 - Journal article

VL - 31

JO - Geophysical Research Letters

JF - Geophysical Research Letters

SN - 0094-8276

IS - 6

M1 - L06813

ER -

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