Mechanisms Linking Stratospheric Gravity Wave Activity to Hurricane Intensification: Insights From Model Simulation of Hurricane Joaquin

IF 4.6 1区地球科学 Q1 GEOSCIENCES, MULTIDISCIPLINARY

Geophysical Research Letters Pub Date : 2025-05-24 DOI:10.1029/2024GL113531

X. Wu, L. Hoffmann, C. J. Wright, N. P. Hindley, M. J. Alexander, X. Wang, B. Chen, Y. Wang, M. Li

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引用次数: 0

Abstract

Previous studies based on satellite observations and model simulations have revealed a significant correlation between intense stratospheric gravity wave (GW) activity and hurricane intensification. This research further investigated the underlying mechanism of this correlation by analyzing the properties and propagation characteristics of stratospheric GWs excited by Hurricane Joaquin based on a Weather Research and Forecasting model simulation. By employing the 3-D Stockwell wave analysis method, we found that GWs excited during hurricane intensification display relatively higher intrinsic frequencies, shorter horizontal wavelengths, and longer vertical wavelengths than during weakening. Analysis of these GWs' propagation using the GROGRAT ray-tracing model revealed that they can reach the middle stratosphere rapidly within 20 min. This quick propagation enabled the observation of intense stratospheric GWs before the hurricane reached its peak intensity, offering a potential indicator for hurricane intensification. These findings strengthened the basis for considering stratospheric GW activity as a proxy for hurricane intensification under specific conditions.

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将平流层重力波活动与飓风增强联系起来的机制：来自飓风华金模式模拟的见解

以往基于卫星观测和模式模拟的研究已经揭示了强烈的平流层重力波（GW）活动与飓风增强之间的显著相关性。本研究基于天气研究与预报模式模拟，分析了华金飓风激发的平流层GWs的特性和传播特征，进一步探讨了这种相关性的潜在机制。利用三维Stockwell波分析方法，我们发现在飓风增强期间激发的gw比在飓风减弱期间激发的gw表现出更高的固有频率、更短的水平波长和更长的垂直波长。利用GROGRAT射线追踪模型对这些gw的传播进行分析，发现它们可以在20分钟内快速到达平流层中部。这种快速传播使得在飓风达到峰值强度之前就能观测到强平流层gw，为飓风增强提供了一个潜在的指标。这些发现加强了将平流层GW活动视为特定条件下飓风强度的代理的基础。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Geophysical Research Letters 地学-地球科学综合

CiteScore

9.00

自引率

9.60%

发文量

1588

审稿时长

2.2 months

期刊介绍： Geophysical Research Letters (GRL) publishes high-impact, innovative, and timely research on major scientific advances in all the major geoscience disciplines. Papers are communications-length articles and should have broad and immediate implications in their discipline or across the geosciences. GRLmaintains the fastest turn-around of all high-impact publications in the geosciences and works closely with authors to ensure broad visibility of top papers.