A climatology of stratospheric gravity waves (SGWs) induced by tropical cyclones (TC-SGWs) is necessary for stratospheric aviation safety and accurate numerical weather prediction. Few previous works have characterized the climatology of TC-SGWs, and the relative importance of the source and background wind for TC-SGWs has not been clearly established. Here we present the distribution of TC-SGWs formed over the northwest Pacific Ocean based on 30 years of ERA5 reanalysis data. Using explainable artificial intelligence, we found the background wind in the lower stratosphere to be more important than TCs in controlling the distribution pattern of TC-SGWs. The background wind shear can influence the direction of TC-SGW propagation by refraction and filtering, which influences the distribution pattern of the TC-SGWs. The TC intensity only influences the TC-SGW intensity. Our results provide information on TC-SGW hotspots and suggest the importance of the background wind shear.

热带气旋（TC-SGW）引起的平流层重力波（SGW）的气候学对于平流层航空安全和准确的数值天气预报是必要的。以前的工作很少描述 TC-SGW 的气候特征，并且源风和背景风对于 TC-SGW 的相对重要性尚未明确确定。在这里，我们根据 30 年的 ERA5 再分析数据展示了西北太平洋上空形成的 TC-SGW 的分布。利用可解释的人工智能，我们发现平流层低层的背景风在控制 TC-SGW 的分布模式方面比 TC 更重要。背景风切变可以通过折射和过滤影响TC-SGW的传播方向，从而影响TC-SGW的分布格局。 TC强度仅影响TC-SGW强度。我们的结果提供了有关 TC-SGW 热点的信息，并表明了背景风切变的重要性。