The role of tropical waves in the genesis of Tropical Cyclone Seroja in the Maritime Continent.
The role of tropical waves in the genesis of Tropical Cyclone Seroja in the Maritime Continent.
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DOI：
10.1038/s41467-023-36498-w
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发表时间：
2023-02-15
影响因子：
16.6
通讯作者：
Matthews, Adrian J.
中科院分区：
文献类型：
--
作者：
Latos, Beata;Peyrille, Philippe;Lefort, Thierry;Baranowski, Dariusz B.;Flatau, Maria K.;Flatau, Piotr J.;Riama, Nelly Florida;Permana, Donaldi S.;Rydbeck, Adam V.;Matthews, Adrian J.
热带气旋塞罗贾是第一个对印度尼西亚土地产生重大影响的热带气旋之一，也是靠近帝汶岛的最强热带气旋之一。 2021 年 4 月，塞罗贾给印度尼西亚和东帝汶近赤道地区带来了历史性的洪水，并影响了西澳大利亚。在这里，我们表明，靠近陆地的不寻常的近赤道气旋发生是由于与多重波相互作用相关的“完美风暴”条件造成的。具体来说，这与马登-朱利安振荡（MJO）事件前缘的赤道对流增强有关。在 MJO 内，对流耦合的赤道罗斯贝波和两个对流耦合的开尔文波之间的相互作用跨越了初始涡旋并加速了气旋发生。平均而言，这种有利的大气条件每年会出现一次。这些结果表明，海洋大陆热带气旋的可预测性有可能提高。热带气旋“塞罗贾”是首批袭击印度尼西亚和东帝汶近赤道地区的气旋之一。靠近陆地的异常气旋发生是由于与多重波浪相互作用相关的“完美风暴”条件造成的。
Tropical cyclone Seroja was one of the first tropical cyclones to significantly impact Indonesian land, and the strongest one in such close proximity to Timor Island. In April 2021 Seroja brought historic flooding to near-equatorial regions of Indonesia and East Timor, as well as impacting Western Australia. Here we show that the unusual near-equatorial cyclogenesis in close proximity to a land mass was due to “perfect storm” conditions associated with multiple wave interactions. Specifically, this was associated with enhanced equatorial convection on the leading edge of a Madden–Julian Oscillation (MJO) event. Within the MJO, the interaction between a convectively coupled equatorial Rossby wave and two convectively coupled Kelvin waves span up the initial vortex and accelerated cyclogenesis. On average, such favorable atmospheric conditions can occur once per year. These results indicate the potential for increased predictability of tropical cyclones over the Maritime Continent. Tropical cyclone Seroja was one of the first cyclones to strike near-equatorial regions of Indonesia and East Timor. The unusual cyclogenesis close to a land mass was due to “perfect storm” conditions associated with multiple wave interactions.
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