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COSMIC observation of stratospheric gravity wave and ionospheric scintillation correlation
Journal of Atmospheric and Solar-Terrestrial Physics ( IF 1.9 ) Pub Date : 2021-03-16 , DOI: 10.1016/j.jastp.2021.105598
Qian Wu , Min-Yang Chou , W. Schreiner , J. Braun , N. Pedatella , Iurii Cherniak

A correlation study is performed to investigate possible connections between the stratospheric gravity waves and the ionospheric plasma bubble induced GPS signal scintillations. Using the COSMIC 1 neutral temperature data (10–30 km), we extract gravity wave amplitudes with vertical wavelengths from 2.5 to 10 km within the latitudinal range from 37.5S to 37.5N. We then calculated the occurrence of high GPS L1 amplitude scintillation (S4 > 0.2) in the equatorial region (25S and 25N). The high S4 values showed consistent higher correlations with gravity waves at the equator than those away from the equator for all vertical wavelengths between 2010 and 2013. While the peak correlation is only ~0.2, the consistency over different wavelengths and years suggests a possible link, which could be through seeding of plasma bubbles and/or modulation of the neutral wind dynamo by gravity waves. We see the need for further study based on statistics of simultaneous observations of gravity waves, ionospheric scintillations, and other ionospheric and thermospheric parameters, which can lead to a better understanding of the plasma bubble formation mechanism.



中文翻译:

平流层重力波的COSMIC观测与电离层闪烁的相关性

进行了相关研究,以研究平流层重力波与电离层等离子体气泡引起的GPS信号闪烁之间的可能联系。使用COSMIC 1中性温度数据(10-30 km),我们提取了在37.5S到37.5N的纬度范围内垂直波长为2.5到10 km的重力波振幅。然后,我们计算了赤道区域(25S和25N)中GPS L1高幅度闪烁的发生(S4> 0.2)。对于2010年至2013年之间的所有垂直波长,高S4值显示出与赤道处的重力波相关性始终高于远离赤道的相关性。虽然峰值相关性仅为〜0.2,但不同波长和年份的一致性表明可能存在联系,这可能是由于等离子气泡的播种和/或重力波对中性风发电机的调节。我们认为有必要根据对重力波,电离层闪烁以及其他电离层和热层参数的同时观测的统计数据进行进一步研究,这可以使人们更好地理解等离子体气泡的形成机理。

更新日期:2021-03-19
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