ULF geomagnetic and polar cap potential signatures in the temperature and zonal wind reanalysis data in Antarctica

M. Regi; M. De Lauretis; G. RedaelliP. Francia

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ULF geomagnetic and polar cap potential signatures in the temperature and zonal wind reanalysis data in Antarctica

机译：ULF地磁和极冠潜在签名在温度和纬向风再分析数据在南极洲

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In the present study we investigated the possible coupling between geomagnetic activity and the low atmosphere dynamics in the polar cap. We compared daily values of the ERA-Interim temperature and zonal wind over Antarctica, with the daily geomagnetic ULF power, in the Pc5 (1–7 mHz), Pc1, and Pc2 (100 mHz–1 Hz) frequency ranges, at Terra Nova Bay (Antarctica, corrected geomagnetic latitude λ ~ 80°S) and with solar wind data during 2007, in correspondence to the last declining phase of the solar cycle 23. We found a high and statistically significant correspondence of temperature and zonal wind fluctuations in the stratosphere and troposphere with geomagnetic ULF power fluctuations at the ~27 day periodicity, with a substantial reduction at the tropopause height. A similar, clear relationship between the meteorological parameters and the polar cap potential difference was also observed. The results suggest that the changes in the atmospheric conductivity, due to energetic electrons precipitation driven by the ULF waves, as well as the high latitude potential variations, both associated to high geomagnetic activity, can affect the atmospheric dynamics.

机译：在目前的研究中我们调查的可能地磁活动和低之间的耦合大气动力学的极冠。我们比较每日ERA-Interim温度和的值纬向风在南极洲,每天地磁ULF权力,Pc5 (1 - 7 mHz), Pc1,和Pc2 (100 mHz-1 Hz)频率范围,在TerraNova湾(南极洲,纠正了地磁纬度λ~ 80°S)和太阳风数据在2007年期间,在信件最后太阳活动周期的下降阶段23。高,统计上显著的信件的温度和纬向风的波动与地磁ULF平流层和对流层功率波动的周期性~ 27天,在对流层顶与大量减少高度。气象参数和极地冰冠电位差也观察到。结果表明,的变化大气电导率,由于精力充沛电子降水由ULF波,以及高纬度的潜力相关的高地磁变化活动,会影响大气动力学。

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《Journal of Geophysical Research, A. Space Physics: JGR》 |2016年第1期|286-295|共10页
作者
M. Regi; M. De Lauretis; G. RedaelliP. Francia;
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作者单位

CETEMPS/Department of Physical and Chemical Sciences, University of L'Aquila, L'Aquila, Italy;

Department of Physical and Chemical Sciences, University of L'Aquila, L'Aquila, Italy;

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正文语种英语
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geomagnetic; Correspondence; Wind dataAtmospheric circulationAtmospheric Conductivitymeteorological parameterpolar capsGeomagnetic ActivityFluconazoleAntarcticafluctuationsULFTemperature;

机译：地磁;通信;风dataAtmosphericcirculationAtmospheric Conductivitymeteorologicalparameterpolar capsGeomagnetic;

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ULF geomagnetic and polar cap potential signatures in the temperature and zonal wind reanalysis data in Antarctica

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