Abstract
In 2022, three tropical cyclones (TCs) successively moved northward in the Northwest Pacific. Both the preceding and subsequent TCs can cause obvious sea surface temperature cooling (SSTC), which may last from a few days to a month. In this study, an uncoupled atmosphere-only model and a coupled ocean-atmosphere model were employed to investigate the effects of the SSTC caused by the preceding TCs on the track and intensity of the subsequent TCs. The results indicated that in the atmosphere-only simulations, the subsequent TC had a northeast shift in the track and a reduced intensity. The ocean-atmosphere coupled simulations showed similar TC track adjustments, but different TC intensity change results. The analysis suggested that the deviation of the TC track is the combined effect of the changes in the steering flow, beta drift, and diabatic heating. For the change of TC intensity, not only the SSTC but also the thickness of the oceanic mixed layer needs to be considered. The related physical mechanisms are analyzed in this paper.
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