Lin et al. (2025) The Positive Pacific–Japan Pattern Drives Compound Heat and Dry Extremes in Summer over Taiwan

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Identification

• Journal: Journal of Climate
• Year: 2025
• Date: 2025-08-28
• Authors: Szu‐Ying Lin, Min‐Hui Lo, Wan‐Ling Tseng, Yi‐Chi Wang, Chao Cheng
• DOI: 10.1175/jcli-d-24-0573.1

Research Groups

Not specified in the provided text.

Short Summary

This study examines how the positive phase of the Pacific–Japan (PJ) pattern triggers compound heat wave–drought events in Taiwan via land–atmosphere feedback mechanisms.

Objective

• To investigate the role of the Pacific–Japan (PJ) pattern in driving compound heat wave–drought events in Taiwan and to analyze the underlying land–atmosphere interactions.

Study Configuration

• Spatial Scale: Regional (Taiwan), with a high-resolution grid of 2 km.
• Temporal Scale: 1980 to 2019.

Methodology and Data

• Models used: Taiwan Reanalysis Downscaling data (TReAD).
• Data sources: High-resolution regional reanalysis dataset.

Main Results

• The positive phase of the PJ pattern is associated with suppressed rainfall and depleted soil moisture.
• Soil moisture deficits trigger a reduction in latent heat flux and a corresponding increase in sensible heat flux.
• This shift in energy exchange amplifies near-surface temperatures, thereby increasing the frequency and intensity of heat waves.

Contributions

• Provides a process-based foundation for using the PJ pattern as a seasonal-scale indicator for compound hot and dry risks in Taiwan.
• Demonstrates the critical role of land–atmosphere coupling in modulating surface climate responses to large-scale meteorological forcing.

Funding

Not specified in the provided text.

Citation

@article{Lin2025Positive,
  author = {Lin, Szu‐Ying and Lo, Min‐Hui and Tseng, Wan‐Ling and Wang, Yi‐Chi and Cheng, Chao},
  title = {The Positive Pacific–Japan Pattern Drives Compound Heat and Dry Extremes in Summer over Taiwan},
  journal = {Journal of Climate},
  year = {2025},
  doi = {10.1175/jcli-d-24-0573.1},
  url = {https://doi.org/10.1175/jcli-d-24-0573.1}
}