Lin et al. (2026) Mechanistic Link Between Precipitation Types and Stable Isotope Evolution in Tropical Cyclones: A Case Study of Typhoon Rai (2021)

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

Identification

• Journal: Hydrological Processes
• Year: 2026
• Date: 2026-01-01
• Authors: Yuehong Lin, Yunyue Yang, Xiuyang Jiang, Y Wang, Hezi Sun, Shuijing Zhai
• DOI: 10.1002/hyp.70395

Research Groups

The specific research groups, labs, or departments are not explicitly mentioned in the abstract, but the study involved collecting samples in Fuzhou, Southeastern China, implying involvement of local institutions.

Short Summary

This study investigated the stable isotopic composition of hourly precipitation during Typhoon Rai in Fuzhou, Southeastern China, revealing a two-stage variation in δ¹⁸O values primarily driven by a shift from intense convective to stratiform-dominated precipitation processes.

Objective

• To advance the mechanistic understanding of isotopic fractionation during Typhoon Rai (December 2021) by elucidating stable isotope signatures associated with distinct precipitation types.

Study Configuration

• Spatial Scale: Fuzhou, Southeastern China (sampling site).
• Temporal Scale: During Typhoon Rai (December 2021), with hourly precipitation samples collected.

Methodology and Data

• Models used: Not mentioned in the abstract.
• Data sources: Hourly precipitation samples collected in Fuzhou, Southeastern China.

Main Results

• Significant fluctuations in δ¹⁸O values were observed, with a mean of -9.24‰ ± 3.80‰ (standard deviation) and a range from -2.75‰ to -13.29‰.
• A typical two-stage variation pattern was identified:
  • First stage: As the typhoon approached, rainfall δ¹⁸O progressively decreased from -2.75‰ to -12.62‰, attributed to intense convective precipitation and subsequent rainout processes.
  • Second stage: Isotopic values stabilised at -13.29‰, reflecting a shift to stratiform-dominated precipitation. This stabilisation was linked to post-convective stratiform development (anvil clouds) inheriting extremely depleted δ¹⁸O signatures, further modified by cloud microphysical fractionation.

Contributions

• Highlights the critical role of precipitation types in governing isotopic variability during typhoon events.
• Offers new insights into the complex interplay between dynamic and microphysical processes in strong tropical cyclones.

Funding

Not mentioned in the abstract.

Citation

@article{Lin2026Mechanistic,
  author = {Lin, Yuehong and Yang, Yunyue and Jiang, Xiuyang and Wang, Y and Sun, Hezi and Zhai, Shuijing},
  title = {Mechanistic Link Between Precipitation Types and Stable Isotope Evolution in Tropical Cyclones: A Case Study of Typhoon Rai (2021)},
  journal = {Hydrological Processes},
  year = {2026},
  doi = {10.1002/hyp.70395},
  url = {https://doi.org/10.1002/hyp.70395}
}