Yao et al. (2025) Spatiotemporal Characteristics and Associated Circulation Features of Summer Extreme Precipitation in the Yellow River Basin

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Identification

• Journal: Atmosphere
• Year: 2025
• Date: 2025-07-21
• Authors: Degui Yao, Xiaohui Wang, Jinyu Wang
• DOI: 10.3390/atmos16070892

Research Groups

Not specified in the provided text.

Short Summary

This study analyzes summer extreme precipitation in China's Yellow River Basin from 1981 to 2020, identifying spatial distribution patterns and their drivers related to atmospheric circulation and sea surface temperatures.

Objective

• To investigate the climatological characteristics, leading modes, and the relationships between summer extreme precipitation in the Yellow River Basin (YRB) and atmospheric circulation and sea surface temperature (SST).

Study Configuration

• Spatial Scale: Yellow River Basin (YRB), China.
• Temporal Scale: 1981–2020 (Summer season).

Methodology and Data

• Models used: Empirical Orthogonal Function (EOF) analysis and extreme precipitation metrics.
• Data sources: Daily precipitation data from 400 meteorological stations; atmospheric and oceanic reanalysis data.

Main Results

• Spatial Distribution: Both the frequency and intensity of extreme precipitation increase toward the east and south; regions with higher precipitation exhibit higher interannual variability.
• Coherent Enhancement Mode: Spatially coherent increases in precipitation are linked to an Eurasian teleconnection wave train (facilitating southward cold air movement) and the northward extension of the Western Pacific subtropical high (WPSH) (enhancing moisture transport), occurring during transitions from El Niño to La Niña.
• Dipole Mode: A "south-increase, north-decrease" pattern is driven by the convergence of cold air and moisture in the southern YRB, caused by a southward-shifted Ural high and a westward-extended WPSH, with no dominant SST driver.

Contributions

• The study clarifies the climatological patterns of extreme summer precipitation in the YRB and identifies the specific atmospheric (WPSH, Ural high, Eurasian wave train) and oceanic (SST/ENSO) mechanisms that trigger different spatial modes of precipitation.

Funding

Not specified in the provided text.

Citation

@article{Yao2025Spatiotemporal,
  author = {Yao, Degui and Wang, Xiaohui and Wang, Jinyu},
  title = {Spatiotemporal Characteristics and Associated Circulation Features of Summer Extreme Precipitation in the Yellow River Basin},
  journal = {Atmosphere},
  year = {2025},
  doi = {10.3390/atmos16070892},
  url = {https://doi.org/10.3390/atmos16070892}
}