Stratospheric Gravity Waves as a Proxy for Hurricane Intensification: A Case Study of Weather Research and Forecast Simulation for Hurricane Joaquin
Stratospheric Gravity Waves as a Proxy for Hurricane Intensification: A Case Study of Weather Research and Forecast Simulation for Hurricane Joaquin
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DOI：
10.1029/2021gl097010
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发表时间：
2021-12
影响因子：
5.2
通讯作者：
Xue Wu;L. Hoffmann;C. Wright;N. Hindley;S. Kalisch;M. J. Alexander;Yinan Wang
中科院分区：
文献类型：
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作者：
Xue Wu;L. Hoffmann;C. Wright;N. Hindley;S. Kalisch;M. J. Alexander;Yinan Wang
我们使用天气研究和预报（WRF）模型对2015年的华金飓风进行了4公里分辨率的模拟。模式数据被用来研究飓风产生的平流层重力波（GW），以及它们如何与飓风强度相关。模拟结果表明，螺旋型大风在远离飓风中心的方向上逆时针向上传播。产生垂直波长达14公里的全球微波。我们发现，GW的活动是更频繁和更激烈的飓风强化期间比减弱，特别是对于最激烈的GW活动。平流层GW强度的变化与飓风强度有显著的相关性。因此，强烈的平流层GW活动的出现可能被认为是识别飓风强化的有用代理。
We conducted simulations with a 4‐km resolution for Hurricane Joaquin in 2015 using the weather research and forecast (WRF) model. The model data are used to study stratospheric gravity waves (GWs) generated by the hurricane and how they correlate with hurricane intensity. The simulation results show spiral GWs propagating upward and anticlockwise away from the hurricane center. GWs with vertical wavelengths up to 14 km are generated. We find that GW activity is more frequent and intense during hurricane intensification than during weakening, particularly for the most intense GW activity. There are significant correlations between the change of stratospheric GW intensity and hurricane intensity. Therefore, the emergence of intensive stratospheric GW activity may be considered a useful proxy for identifying hurricane intensification.