Fang et al. (2025) The Increased Influence of Eastern European Blocking Highs on Extreme Rainfall Over Pakistan in Recent Decades

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

Identification

• Journal: International Journal of Climatology
• Year: 2025
• Date: 2025-12-14
• Authors: Congxi Fang, Lijun Su, Jinlei Chen, Zhiman Su, Chaojun Ouyang, Jun Wen, Shuang Liu, Xiong Jiang
• DOI: 10.1002/joc.70225

Research Groups

Information not available from the abstract.

Short Summary

This study investigates the long-term impact of Eastern European blocking highs on extreme precipitation in Pakistan, revealing an intensification of this effect after the 1990s primarily due to Arctic warming-induced alterations in atmospheric circulation.

Objective

• To determine whether the impact of Eastern European blocking highs on extreme precipitation in Pakistan, observed in recent events, is applicable over longer periods and to elucidate the underlying mechanisms driving this relationship.

Study Configuration

• Spatial Scale: Eastern Europe (EEU), Pakistan, Arctic, China, Barents and Kara Seas, South Asia (monsoon region).
• Temporal Scale: 1961 to 2022.

Methodology and Data

• Models used: Numerical simulations (specific model names not mentioned in abstract).
• Data sources: Observations and reanalysis data.

Main Results

• The impact of Eastern European blocking highs on precipitation in Pakistan has intensified after the 1990s.
• This shift is attributed to the warming trend in the Arctic.
• In recent extreme rainfall cases, EEU blocking highs transmitted Rossby wave energy southeastward, crossing the polar front jet and subtropical jet, leading to a high-pressure anomaly over China.
• This effect, combined with anomalous activities of tropical oceanic oscillations and the South Asian monsoon, created favorable conditions for extreme rainfall in Pakistan.
• Arctic warming contributed by altering the westerly jet over EEU, displacing the blocking activity center southward from the Barents and Kara Seas.
• This displacement facilitated the propagation of Rossby wave trains that connected the EEU blocking highs with extreme rainfall over Pakistan.

Contributions

• Elucidates the long-term mechanisms driving extreme precipitation in Pakistan, linking them to Arctic warming.
• Offers valuable insights for future prediction of such events.
• Highlights the likelihood of recurrence of similar extreme rainfall events due to continued warming, underscoring the need for proactive disaster mitigation.

Funding

Information not available from the abstract.

Citation

@article{Fang2025Increased,
  author = {Fang, Congxi and Su, Lijun and Chen, Jinlei and Su, Zhiman and Ouyang, Chaojun and Wen, Jun and Liu, Shuang and Jiang, Xiong},
  title = {The Increased Influence of Eastern European Blocking Highs on Extreme Rainfall Over Pakistan in Recent Decades},
  journal = {International Journal of Climatology},
  year = {2025},
  doi = {10.1002/joc.70225},
  url = {https://doi.org/10.1002/joc.70225}
}