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Secular Drift of the Auroral Ovals : How Fast Do They Actually Move? / Tsyganenko, N. A.

In: Geophysical Research Letters, Vol. 46, No. 6, 28.03.2019, p. 3017-3023.

Research output: Contribution to journal › Article › peer-review

Harvard

Tsyganenko, NA 2019, 'Secular Drift of the Auroral Ovals: How Fast Do They Actually Move?', Geophysical Research Letters, vol. 46, no. 6, pp. 3017-3023. https://doi.org/10.1029/2019GL082159

APA

Tsyganenko, N. A. (2019). Secular Drift of the Auroral Ovals: How Fast Do They Actually Move? Geophysical Research Letters, 46(6), 3017-3023. https://doi.org/10.1029/2019GL082159

Vancouver

Tsyganenko NA. Secular Drift of the Auroral Ovals: How Fast Do They Actually Move? Geophysical Research Letters. 2019 Mar 28;46(6):3017-3023. https://doi.org/10.1029/2019GL082159

Author

Tsyganenko, N. A. / Secular Drift of the Auroral Ovals : How Fast Do They Actually Move?. In: Geophysical Research Letters. 2019 ; Vol. 46, No. 6. pp. 3017-3023.

BibTeX

@article{476e542b5b93420a89775d0151ded08e,
title = "Secular Drift of the Auroral Ovals: How Fast Do They Actually Move?",
abstract = "A surprisingly fast secular drift of the Northern geomagnetic dip pole during the last two decades has attracted much interest lately, in particular, evoking speculations about a possibility of a sweeping relocation of the auroral oval. This letter presents first results of a model investigation of this issue, based on an empirical representation of the distant magnetosphere combined with a series of internal geomagnetic field models for 12 epochs, covering the interval from 1965 to 2020. The secular drift of the northern auroral oval was found to result in its net displacement over the 55-year period, commensurate with the concurrent shifts of the centered, eccentric, and corrected geomagnetic poles, all of them much smaller than the enormous spurt of the northern dip pole. In the Southern Hemisphere, the shift of the auroral oval and of the poles over the same period is much weaker, revealing a remarkable interhemispheric asymmetry.",
keywords = "auroral oval, eccentric dipole, empirical models, IGRF, magnetosphere, secular shift, FIELD",
author = "Tsyganenko, {N. A.}",
year = "2019",
month = mar,
day = "28",
doi = "10.1029/2019GL082159",
language = "English",
volume = "46",
pages = "3017--3023",
journal = "Geophysical Research Letters",
issn = "0094-8276",
publisher = "American Geophysical Union",
number = "6",

}

RIS

TY - JOUR

T1 - Secular Drift of the Auroral Ovals

T2 - How Fast Do They Actually Move?

AU - Tsyganenko, N. A.

PY - 2019/3/28

Y1 - 2019/3/28

N2 - A surprisingly fast secular drift of the Northern geomagnetic dip pole during the last two decades has attracted much interest lately, in particular, evoking speculations about a possibility of a sweeping relocation of the auroral oval. This letter presents first results of a model investigation of this issue, based on an empirical representation of the distant magnetosphere combined with a series of internal geomagnetic field models for 12 epochs, covering the interval from 1965 to 2020. The secular drift of the northern auroral oval was found to result in its net displacement over the 55-year period, commensurate with the concurrent shifts of the centered, eccentric, and corrected geomagnetic poles, all of them much smaller than the enormous spurt of the northern dip pole. In the Southern Hemisphere, the shift of the auroral oval and of the poles over the same period is much weaker, revealing a remarkable interhemispheric asymmetry.

AB - A surprisingly fast secular drift of the Northern geomagnetic dip pole during the last two decades has attracted much interest lately, in particular, evoking speculations about a possibility of a sweeping relocation of the auroral oval. This letter presents first results of a model investigation of this issue, based on an empirical representation of the distant magnetosphere combined with a series of internal geomagnetic field models for 12 epochs, covering the interval from 1965 to 2020. The secular drift of the northern auroral oval was found to result in its net displacement over the 55-year period, commensurate with the concurrent shifts of the centered, eccentric, and corrected geomagnetic poles, all of them much smaller than the enormous spurt of the northern dip pole. In the Southern Hemisphere, the shift of the auroral oval and of the poles over the same period is much weaker, revealing a remarkable interhemispheric asymmetry.

KW - auroral oval

KW - eccentric dipole

KW - empirical models

KW - IGRF

KW - magnetosphere

KW - secular shift

KW - FIELD

UR - http://www.scopus.com/inward/record.url?scp=85064208222&partnerID=8YFLogxK

UR - http://www.mendeley.com/research/secular-drift-auroral-ovals-fast-actually-move

U2 - 10.1029/2019GL082159

DO - 10.1029/2019GL082159

M3 - Article

AN - SCOPUS:85064208222

VL - 46

SP - 3017

EP - 3023

JO - Geophysical Research Letters

JF - Geophysical Research Letters

SN - 0094-8276

IS - 6

ER -

ID: 41340740