Increase in tropical cyclone rain rate with translation speed

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

5 Scopus Citations
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Author(s)

  • Shifei Tu
  • Johnny C. L. Chan
  • Jianjun Xu
  • Quanjia Zhong
  • Wen Zhou
  • And 1 others
  • Yu Zhang

Detail(s)

Original languageEnglish
Article number7325
Journal / PublicationNature Communications
Volume13
Online published28 Nov 2022
Publication statusPublished - 2022

Link(s)

Abstract

In general, tropical cyclone (TC) rainfall accumulation usually decreases with faster TC translation speed but increases with heavier rain rate. However, how the TC rain rate changes with translation speed is unclear. Here we show that, in all TC basins, the average TC rain rate significantly increases with translation speed. On average, the rain rate in a fast-moving TC is 24% higher than in a slow one. This difference increases with TC intensity, with category 3–5 TCs having a 42% increase while tropical depressions exhibit only a 9% increase. The increase in the average TC rain rate with translation speed is mainly caused by the TC net inflow in the lower troposphere, as well as vertical wind shear. These findings have important implications not only for a deeper understanding of rain rate changes in a translating TC but also for short-term forecasts of TC rainfall and disaster preparedness.

Research Area(s)

Citation Format(s)

Increase in tropical cyclone rain rate with translation speed. / Tu, Shifei; Chan, Johnny C. L.; Xu, Jianjun et al.
In: Nature Communications, Vol. 13, 7325, 2022.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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