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QBO influences on the variability of planetary waves in the equatorial mesopause region

机译:QBO对赤道中度停球区行星波变异性的影响

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摘要

MF radar observations of hourly mean zonal and meridional winds at 86 km over Tirunelveli (8.7°N, 77.8°E), India, over a period of five years (1993-1997) are utilized to study the possible influence of stratospheric quasi-biennial oscillation (QBO) on the vertical propagation of planetary-scale waves. The radiosonde winds at Singapore are used to identify the phase of the stratospheric QBO at 30 hPa. The study reflects that the interannual variability of the planetary waves may be explained partly by the direction of the stratospheric QBO winds. Limitations of the present work are: (i) the QBO cycles considered are not many and (ii) the observed waves are presumed to originate from below and propagate through the stratospheric QBO wind system.
机译:MF雷达对印度Tirunelveli(8.7°N,77.8°E)在86-km的区域内,五年(1993-1997)的小时平均纬向和经向风的观测,用于研究平流层准双年度的可能影响行星尺度波垂直传播的振荡(QBO)。新加坡的探空仪风用于识别30 hPa平流层QBO的相位。研究表明,行星波的年际变化可以部分用平流层QBO风的方向来解释。当前工作的局限性是:(i)所考虑的QBO周期不多,并且(ii)假定观察到的波源于下方,并通过平流层QBO风力系统传播。

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