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Abstract
Weather research models have been used to investigate the sensitivity of simulations of Typhoon Tembin (1214) to changes in three horizontal grid spacings and the effect of the cold wake generated by Typhoon Bolaven (1215). We used modified sea surface temperature (SST) to simulate Tembin as it approached after Bolaven had passed through the Ieodo Ocean Research Station and the Yellow Sea buoy in Korea. In the tropical cyclone (TC) tracking experiments, a higher resolution showed the faster and more eastward movement of TCs in all SST conditions. TCs tend to move more eastward at all resolutions particularly when there is a cold wake in their western regions. When there is no cold wake, the intensity of TC is very sensitive to the resolution of the experiment. If a cold wake is maintained on the western and eastern sides, TC intensity is less sensitive to differences in resolution. The precipitation from TCs in the cold wake of the eastern (western) region is lower (higher) than when there is no wake. The TC-generated cold wake significantly affects intensity and movement in cold wake cases in the western region, regardless of horizontal grid, for various reasons.
Highlights
Typhoons are significant causes of disasters such as floods and building collapses through their strong winds and heavy rains
Based on the results of previous studies that indicated that the typhoon-generated cold wake affects the intensity of the subsequent typhoon [34,35], we examined the change in intensity in the tropical cyclone (TC) between experiments with mean sea level pressure
We examine the effects of the location of the Typhoon Bolaven-generated cold wake
Summary
Typhoons are significant causes of disasters such as floods and building collapses through their strong winds and heavy rains. In Dare and McBride [33], the cooling effect of an initial typhoon was recovered by just 44% approximately five days following the cooling, and by 88% after 30 days This cold wake effect impacts the direction and intensity of other typhoons [28,34,35,36,37,38]. We investigate the effect of the Typhoon Bolaven-generated cold wake on the track, intensity, and precipitation of Typhoon Tembin using the potential vorticity tendency (PVT) and vertical structure of potential vorticity (PV).
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