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Multidecadal variability of rapid intensification of tropical cyclones passing through the South China Sea (SCS) is investigated using the best track data set of tropical cyclones archived at the China Meteorological Administration, the National Center for Atmospheric Research/National Center for Environmental Prediction atmospheric reanalysis data set, and the China Ocean Reanalysis oceanic reanalysis data set from the National Marine Data and Information Service. During 1951−2017, tropical cyclones passing through the SCS are occurred concentratedly from June through December, among which the tropical cyclones with rapid intensification (RI) are concentrated from July through December. RI events have shown multidecadal variability, which is significantly correlated with the Pacific Decadal Oscillation (PDO). In positive PDO years, RI events, with relatively low frequency, mainly distribute in Eastern Philippines and north of the SCS, while in negative PDO years, RI events, with relatively high frequency, mainly distribute in a large area of eastern Philippines. The multidecadal variation of RI of tropical cyclones passing through the SCS is related to large-scale oceanic and atmospheric variables modulated by PDO. Regression analysis shows that tropical cyclone heat potential has the greatest effect on the multidecadal variation of RI, while relative humidity has a relatively small effect and the effect of vertical wind shear is smaller.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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