Table 4 TC-induced SST cooling (°C) along the track of TC averaged in a radius of 2° × 2° in the MDR (120°E–170°E, 7.5°N–27.5°N) from genesis to LMI during the summer (June–August) and autumn (September–November) seasons for different TC categories during the period 2005–2020

From: Mechanism driving stronger tropical cyclones in cooler autumn than the hottest summer

 

Summer (°C)

Autumn (°C)

Difference (Autumn minus Summer, °C)

All TC

−0.36 ± 0.43

−0.29 ± 0.37

0.07 (p < 0.01)

TS category (winds < 65 knots)

−0.32 ± 0.40

−0.26 ± 0.32

0.06 (p < 0.01)

Typhoon category (Category 1 + 2; winds between 65 and 95 knots)

−0.43 ± 0.53

−0.33 ± 0.44

0.10 (p < 0.01)

Intense typhoon category (Category 3 + 4 + 5; winds ≥ 100 knots)

−0.42 ± 0.39

−0.34 ± 0.36

0.08 (p = 0.03)

  1. The last column denotes the difference of TC-induced cooling between the autumn and summer seasons and p-value indicates the statistical significance of the differences between the two seasons using two-tailed Student’s t-test.
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