The African easterly jet (AEJ) and the West African Monsoon (WAM) can largely modulate high-impact weather over Africa and the tropical Atlantic. How these features will change with a warming climate is just starting to be addressed due to global climate model limitations in resolving convection. We employ a novel regional setup for an atmospheric convection-permitting model alongside the pseudo-global warming (PGW) approach to address climate change impacts on the weather-climate system of Africa during a short period of high-impact weather. Our findings indicate that the AEJ and WAM may intensify in a future warming climate scenario. Precipitation is shown to increase over Guinea Highlands and Cameroon Mountains and shift southward due to a latitudinal expansion and increase of deep convection closer to the equator. This has relevant ramifications for the livelihood of communities that depend on water-fed crops in tropical Africa.

中文翻译：

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准全球变暖对非洲天气气候系统的影响


非洲东风急流 （AEJ） 和西非季风 （WAM） 可以在很大程度上调节非洲和热带大西洋的高影响天气。由于全球气候模型在解析对流方面的局限性，这些特征将如何随着气候变暖而变化才刚刚开始得到解决。我们采用一种新的区域设置来构建大气对流允许模型以及伪全球变暖 （PGW） 方法，以解决气候变化在短时间内高影响天气期间对非洲天气气候系统的影响。我们的研究结果表明，AEJ 和 WAM 可能会在未来气候变暖的情况下增强。几内亚高地和喀麦隆山脉的降水增加，由于纬度扩张和靠近赤道的深对流增加，降水向南移动。这对热带非洲依赖水养作物的社区的生计产生了相关影响。