Some Aspects on Sensitivity of Typhoon Intensity to Sea-Surface Temperature

[摘要] Statistical analysis was made to test the relationship between typhoon intensity and sea-surface temperature (SST). The 10-day mean values of SST on 1° latitude-longitude grid with unit of 0.1°C were used. It was shown that intensity percentile of tropical cyclones computed at every 0.5°C bin of SST varies as a function of SST. Relative intensity of a storm is defined with reference to the maximum intensity of a storm. For tropical storms locating over waters warmer than 28.5°C at an observation time, it was shown that storms of higher relative intensity have been over wamer waters for a day or two prior to the observation time than those of lower relative intensity. It was also shown that falling rate of central pressure is dependent on SST. Higher SST allows more rapid falling of central pressure.

[学科分类] 大气科学