Home > Research > Publications & Outputs > Solar and lunar ionospheric electrodynamic effe...

Associated organisational unit

View graph of relations

Solar and lunar ionospheric electrodynamic effects during stratospheric sudden warmings

Research output: Contribution to Journal/MagazineJournal articlepeer-review

Published

Standard

Solar and lunar ionospheric electrodynamic effects during stratospheric sudden warmings. / Yamazaki (YY), Yosuke.

In: Journal of Atmospheric and Solar-Terrestrial Physics, Vol. 119, 11.2014, p. 138-146.

Research output: Contribution to Journal/MagazineJournal articlepeer-review

Harvard

APA

Vancouver

Author

Yamazaki (YY), Yosuke. / Solar and lunar ionospheric electrodynamic effects during stratospheric sudden warmings. In: Journal of Atmospheric and Solar-Terrestrial Physics. 2014 ; Vol. 119. pp. 138-146.

Bibtex

@article{f849092ffd154a17b194e05653aa88c3,
title = "Solar and lunar ionospheric electrodynamic effects during stratospheric sudden warmings",
abstract = "Both solar and lunar atmospheric tides are believed to drive ionospheric electrodynamic effects during stratospheric sudden warmings (SSWs), but their relative importance is not well understood. In this study, long-term records (1958–2007) of the geomagnetic field are analyzed to determine the average solar (S) and lunar (L) ionospheric current systems for SSW and non-SSW periods. It is found that the L current intensity is enhanced during SSWs approximately by 75%, while the relative change in the S current intensity is much smaller (~10%). Nonetheless, absolute changes are comparable in the S and L current intensities. At the magnetic equator, semidiurnal perturbations produced by S and L currents reinforce or cancel each other depending on the phase of the moon, creating lunar-dependent recurrent onset in the total effect. These results indicate that both S and L contributions need to be considered to understand ionospheric variability during SSWs.",
keywords = "Ionospheric current systems, Stratospheric sudden warming, Atmospheric tides, Geomagnetic daily variations, Sq, L",
author = "{Yamazaki (YY)}, Yosuke",
year = "2014",
month = nov,
doi = "10.1016/j.jastp.2014.08.001",
language = "English",
volume = "119",
pages = "138--146",
journal = "Journal of Atmospheric and Solar-Terrestrial Physics",
issn = "1364-6826",
publisher = "PERGAMON-ELSEVIER SCIENCE LTD",

}

RIS

TY - JOUR

T1 - Solar and lunar ionospheric electrodynamic effects during stratospheric sudden warmings

AU - Yamazaki (YY), Yosuke

PY - 2014/11

Y1 - 2014/11

N2 - Both solar and lunar atmospheric tides are believed to drive ionospheric electrodynamic effects during stratospheric sudden warmings (SSWs), but their relative importance is not well understood. In this study, long-term records (1958–2007) of the geomagnetic field are analyzed to determine the average solar (S) and lunar (L) ionospheric current systems for SSW and non-SSW periods. It is found that the L current intensity is enhanced during SSWs approximately by 75%, while the relative change in the S current intensity is much smaller (~10%). Nonetheless, absolute changes are comparable in the S and L current intensities. At the magnetic equator, semidiurnal perturbations produced by S and L currents reinforce or cancel each other depending on the phase of the moon, creating lunar-dependent recurrent onset in the total effect. These results indicate that both S and L contributions need to be considered to understand ionospheric variability during SSWs.

AB - Both solar and lunar atmospheric tides are believed to drive ionospheric electrodynamic effects during stratospheric sudden warmings (SSWs), but their relative importance is not well understood. In this study, long-term records (1958–2007) of the geomagnetic field are analyzed to determine the average solar (S) and lunar (L) ionospheric current systems for SSW and non-SSW periods. It is found that the L current intensity is enhanced during SSWs approximately by 75%, while the relative change in the S current intensity is much smaller (~10%). Nonetheless, absolute changes are comparable in the S and L current intensities. At the magnetic equator, semidiurnal perturbations produced by S and L currents reinforce or cancel each other depending on the phase of the moon, creating lunar-dependent recurrent onset in the total effect. These results indicate that both S and L contributions need to be considered to understand ionospheric variability during SSWs.

KW - Ionospheric current systems

KW - Stratospheric sudden warming

KW - Atmospheric tides

KW - Geomagnetic daily variations

KW - Sq

KW - L

U2 - 10.1016/j.jastp.2014.08.001

DO - 10.1016/j.jastp.2014.08.001

M3 - Journal article

VL - 119

SP - 138

EP - 146

JO - Journal of Atmospheric and Solar-Terrestrial Physics

JF - Journal of Atmospheric and Solar-Terrestrial Physics

SN - 1364-6826

ER -