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首页> 外文期刊>Journal of Geophysical Research, A. Space Physics: JGR >Characteristics of PMSE associated with the geomagnetic disturbance driven by corotating interaction region and high-speed solar wind streams in the declining solar cycle 23
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Characteristics of PMSE associated with the geomagnetic disturbance driven by corotating interaction region and high-speed solar wind streams in the declining solar cycle 23

机译：PMSE相关的特征地磁扰动由共转驱动的相互作用区域和高速太阳风流的太阳周期下降23

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摘要

We report interannual variations of the correlation between the reflectivity of polar mesospheric summer echoes (PMSEs) and solar wind parameters (speed and dynamic pressure), and AE index as a proxy of geomagnetic disturbances, and cosmic noise absorption (CNA) in the declining phase (2001–2008) of solar cycle 23. PMSEs are observed by 52MHz VHF radar measurements at Esrange (67.8°N, 20.4°E), Sweden. In approaching the solar minimum years, high-speed solar wind streams emanate from frequently emerging coronal holes, leading to 7, 9, and 13.5 day periodicities in their arrival at Earth. Periodicities of 7 and/or 9 days are found in PMSE reflectivity in 2005–2006 and 2008. Periodicity-resolved correlations at 7 and 9 days of both D region ionization observed by cosmic noise absorption (CNA) and PMSE with solar wind speed and AE index vary from year to year but generally increase as solar minimum is approached. PMSEs have a higher periodicity-resolved correlation with AE index than the solar wind speed. In addition, cross correlation of PMSE reflectivity with AE index is mostly higher than with CNA in solar minimum years (2005–2008). This can signify that high-speed solar wind stream-induced high-energy particles possibly have strong influence on CNA, but not as much as on PMSE, especially for the years of significant periodicities occurring.
机译：我们报告的年际变化极地的反射率之间的相关性中层夏季回声(pms)和太阳风参数(速度和动态压力)和AE指数作为地磁扰动的一个代理,和宇宙噪声吸收(CNA)下降太阳活动周期的阶段(2001 - 2008)23。观察到52 mhz VHF雷达测量Esrange(67.8°N, 20.4°E),瑞典。太阳能最低年,高速太阳风经常流是从新兴日冕洞,导致7、9和13.5天周期的研究在他们抵达地球。7或9天的周期的研究中发现PMSE反射率在2005 - 2006年和2008年。Periodicity-resolved相关性在7和9天两维电离区域观测到宇宙噪音吸收(CNA)和PMSE太阳风速度和AE指数每年都不同,但是随着太阳能最低通常会增加走近。periodicity-resolved相关性AE指数比太阳风速度。与AE指数PMSE反射率的相关性大多高于CNA太阳能最低年(2005 - 2008)。高速太阳风stream-induced高能对CNA粒子可能有强烈的影响,但不是对PMSE,特别的年的显著周期的研究。

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