Zhu et al. (2026) Observed global increases in tropical cyclone rapid acceleration and deceleration events

⚠️ Warning: This summary was generated from the abstract only, as the full text was not available.

Identification

• Journal: Environmental Research Letters
• Year: 2026
• Date: 2026-03-30
• Authors: Yijie Zhu, Rachel Etzi, Gabriel Spanbroek
• DOI: 10.1088/1748-9326/ae58bc

Research Groups

Not specified in abstract.

Short Summary

This study empirically analyzes global tropical cyclone (TC) observations from 1988 to 2024 to identify temporal and spatial trends in TC translation speed changes. It finds that both rapid acceleration and strong deceleration of TCs have become increasingly prevalent globally, indicating a more variable pattern of storm motion.

Objective

• To analyze temporal and spatial trends in tropical cyclone (TC) translation speed changes (acceleration and deceleration) across six global TC basins.

Study Configuration

• Spatial Scale: Global, encompassing six distinct global tropical cyclone basins.
• Temporal Scale: 1988 to 2024 (37 years), with analyses conducted on 6-hour intervals.

Methodology and Data

• Models used: Empirical analysis; no predictive models mentioned.
• Data sources: Global tropical cyclone observations.

Main Results

• Both rapid acceleration and strong deceleration of tropical cyclones have become increasingly prevalent globally.
• This indicates that the pattern of storm motion is becoming more variable, even though the average change in translation speed has remained relatively unchanged.
• The increase in the frequency of extreme acceleration and deceleration is strongest in the western North Pacific and the South Indian Ocean.
• Conversely, the North Indian Ocean exhibits an opposite trend, showing a decrease in these extreme frequencies.
• These basin-dependent trends are potentially linked to changes in the variability of large-scale steering flow.

Contributions

• Reveals that focusing solely on annual mean tropical cyclone translation speed can mask critical extremes in acceleration and deceleration.
• Highlights an increasing variability in global tropical cyclone storm motion patterns, with significant and contrasting basin-dependent trends.
• Provides empirical evidence of changing tropical cyclone behavior in response to climate variations, extending beyond average speed changes.

Funding

Not specified in abstract.

Citation

@article{Zhu2026Observed,
  author = {Zhu, Yijie and Etzi, Rachel and Spanbroek, Gabriel},
  title = {Observed global increases in tropical cyclone rapid acceleration and deceleration events},
  journal = {Environmental Research Letters},
  year = {2026},
  doi = {10.1088/1748-9326/ae58bc},
  url = {https://doi.org/10.1088/1748-9326/ae58bc}
}