Antarctic polar plateau vertical electric field variations across heliocentric current sheet crossings

Burns, G. B.; Tinsley, Brian A.; Klekociuk, Andrew; Трошичев, О. А.; Frank-Kamenetsky, A. V.; Duldig, M. L.; Bering, Edgar A.; Clem, J.

doi:10.1016/j.jastp.2005.10.008

Cited by 16 publications

(21 citation statements)

References 30 publications

(57 reference statements)

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“…Measurements were collected at 10-s resolution, converted to 'fair-weather' hourly averages, and then diurnal averages as described in Burns et al (2006). Averages are available for 677 days covering the interval 1998-2001; they have a mean of 185 V m À1 and a standard deviation of 29 V m À1 .…”

Section: Methodsmentioning

confidence: 99%

Variations in global cloud cover and the fair-weather vertical electric field

Kniveton

Tinsley

Burns

et al. 2008

Journal of Atmospheric and Solar-Terrestrial Physics

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Section: Methodsmentioning

confidence: 99%

Variations in global cloud cover and the fair-weather vertical electric field

Kniveton

Tinsley

Burns

et al. 2008

Journal of Atmospheric and Solar-Terrestrial Physics

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“…Missing hourly data are filled by normalizing to the two‐monthly, diurnal‐average. At least 10 hours of data were required for a daily average [ Burns et al , 2006].…”

Section: Datamentioning

confidence: 99%

“…In order to use the Vostok electric field measurements as a proxy for the internal driver the solar wind influence should be removed. In a previous paper [ Burns et al , 2006] we have used the Weimer‐1996 empirical model to estimate the daily average component of the potential difference above Vostok owing to solar wind/magnetosphere/ionosphere coupling. Weimer‐1996 is an empirical model derived from satellite measurements of the ionospheric electric field and coincident solar wind data [ Weimer , 1996].…”

Section: Datamentioning

confidence: 99%

“…Hemispheric asymmetry [ Mansurov et al , 1974] and a reduction with decreasing magnetic latitude are expected from solar wind influences in the polar caps [ Tinsley and Heelis , 1993]. Vostok ground‐level, vertical electric field measurements (1998–2001; Burns et al [2005, 2006]) are used to develop a proxy for the larger changes in the ionospheric potential difference globally imposed by the internal generator.…”

Section: Introductionmentioning

confidence: 99%

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Atmospheric circuit influences on ground‐level pressure in the Antarctic and Arctic

et al. 2008

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[1] Pressure variations at 11 Antarctic sites and 7 Arctic sites have been examined and show significant correlations with a daily proxy for the output of the meteorological generators of the global atmospheric circuit. This proxy is derived from vertical electric field measurements made at Vostok on the Antarctic ice plateau. Taken with the finding of proportionate pressure variations correlated with atmospheric circuit changes owing to coupling with the interplanetary electric field, particularly for the Antarctic plateau (magnetic latitude > 83°) region, this provides experimental evidence that a small portion of the surface pressure variations are due to the influence of the global atmospheric circuit. The response to the interplanetary electric field is an example of Sun-weather coupling. To evaluate it, the daily average interplanetary magnetic field (IMF) east-west component (B y ) is used as a proxy for the north-south interplanetary electric field, which produces opposite ionospheric potential changes in the northern and southern polar caps. The correlation with IMF B y for the pressure variations for the Antarctic sites for a solar cycle (1995)(1996)(1997)(1998)(1999)(2000)(2001)(2002)(2003)(2004)(2005) is small (0.9% average covariance for the magnetic latitude > 83°sites) but significant (99.7% confidence level). The Arctic stations show a negative regression between pressure variations and IMF B y , a relationship expected if the linkage process operates by the atmospheric circuit, but it is only found when the interval is restricted to the peak of the sunspot cycle (1999)(2000)(2001)(2002).

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“…Since all levels of the atmosphere are ionized, by cosmic rays, solar radiation, and surface radioactive sources (Aplin and Harrison 2015), there will also be a corresponding anomaly in the vertical current. Both the vertical electric field and current anomalies have been isolated in measurements on the ground (Burns et al 2006, Panneersevam et al 2007 and in the stratosphere (Byrne et al 1991) in Antarctica.…”

Section: Introductionmentioning

confidence: 97%

Regional, seasonal, and inter-annual variations of Antarctic and sub-Antarctic temperature anomalies related to the Mansurov effect

Freeman

Lam

2019

Environ. Res. Commun.

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We use National Centers for Environmental Prediction/National Center for Atmospheric Research reanalysis data to show that Antarctic surface air temperature anomalies result from differences in the daily-mean duskward component, B y , of the interplanetary magnetic field (IMF). We find the statistically-significant anomalies have strong geographical, seasonal, and inter-annual variations. For the interval 1999-2002, regional anomalies poleward of 60°S are of diminishing representative peak amplitude from autumn (3.2°C) to winter (2.4°C) to spring (1.6°C) to summer (0.9°C). Exploiting apparently simplifying properties in the sub-Antarctic region in autumn 1999-2002, we demonstrate that temperature anomalies in this case are due to geostrophic wind anomalies, resulting from the same B y changes, moving air across large meridional gradients in zonal mean air temperature between 50 and 70°S over the 7-hour timescale for which a change in B y can be expected to persist. Since the tropospheric pressure anomalies causing these winds have been associated with B y -driven anomalies in the electric potential of the ionosphere, we conclude that IMF-induced changes to the global atmospheric electric circuit can cause day-to-day changes in regional surface air temperature of up to several degrees Centigrade.

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Antarctic polar plateau vertical electric field variations across heliocentric current sheet crossings

Cited by 16 publications

References 30 publications

Variations in global cloud cover and the fair-weather vertical electric field

Variations in global cloud cover and the fair-weather vertical electric field

Atmospheric circuit influences on ground‐level pressure in the Antarctic and Arctic

Regional, seasonal, and inter-annual variations of Antarctic and sub-Antarctic temperature anomalies related to the Mansurov effect

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