Observational evidence for temporary planetary wave forcing of the MLT during fall equinox
Observational evidence for temporary planetary wave forcing of the MLT during fall equinox
复制标题
秋分期间 MLT 临时行星波强迫的观测证据
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
R. Hibbins
中科院分区：
文献类型：
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作者：
N. H. Stray;Rosmarie J. de Wit;P. Espy;R. Hibbins
我们利用北半球高纬度（51-66°N）超级双极光雷达网雷达的纵向链直接观测到了中流层顶区域的纬向波数1和2行星波活动。在9年的时间里（2000-2008年），观测到的行星波活动在秋分前后持续增加。这与平流层风的最小值一致，因此平流层重力波滤波和随后的中平流层动量沉积也是最小值。尽管如此，观测到的经向风被显示向极方向扰动，中层顶温度暂时升高，这表明每年秋分时，行星波向西的动量沉积暂时成为中层顶区域的主要强迫。
We present direct observations of zonal wave numbers 1 and 2 planetary wave activity in the mesopause region derived from a longitudinal chain of high‐latitude Northern Hemisphere (51–66°N) Super Dual Auroral Radar Network radars. Over a 9 year period (2000–2008), the planetary wave activity observed shows a consistent increase around the fall equinox. This is shown to be coincident with a minimum in the magnitude of the stratospheric winds and consequently a minimum in the stratospheric gravity wave filtering and the subsequent momentum deposition in the mesopause region. Despite this, the observed meridional winds are shown to be perturbed poleward and mesopause temperatures rise temporarily, suggesting that westward momentum deposition from planetary waves temporarily becomes the dominant forcing on the mesopause region each fall equinox.
影响因子：
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作者：
K. Day;N. Mitchell
通讯作者：
K. Day;N. Mitchell
影响因子：
6.3
作者：
K. Day;M. Taylor;N. Mitchell
通讯作者：
K. Day;M. Taylor;N. Mitchell