Chen et al. (2025) Adjustment of Springtime Thermal Anomaly Modes over the Tibetan Plateau Altered Its Interdecadal Relationship with East Asian Summer Monsoon during the Early 2000s

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Identification

• Journal: Journal of Climate
• Year: 2025
• Date: 2025-07-15
• Authors: Yu Chen, Hui Wang, Jie Zhang, Haishan Chen, Lian Chen, LI Dong-liang
• DOI: 10.1175/jcli-d-24-0402.1

Research Groups

Not specified in the provided text.

Short Summary

This study identifies a regime shift around 2004 in the relationship between springtime surface sensible heat (SH) flux over the Tibetan Plateau and the East Asian summer monsoon (EASM), driven by changes in the spatial heating patterns of the central-eastern Tibetan Plateau.

Objective

• To investigate the interdecadal variations and the underlying causes of the relationship between springtime surface sensible heat (SH) flux over the Tibetan Plateau (TP) and the East Asian summer monsoon (EASM).

Study Configuration

• Spatial Scale: Regional (Tibetan Plateau, specifically the central-eastern TP, and East Asia).
• Temporal Scale: Interdecadal (1982–2020), divided into two periods: 1982–2003 and 2004–2020.

Methodology and Data

• Models used: Not explicitly mentioned (analysis based on correlation and circulation field patterns).
• Data sources: Not explicitly mentioned (references surface sensible heat flux and lower-tropospheric circulation data).

Main Results

• Regime Shift: A substantial transformation occurred around 2004, where the correlation between springtime SH flux and the EASM shifted from significantly negative to markedly positive.
• Period 1982–2003: An "overall consistent" heating pattern over the central-eastern TP (CETP) led to a robust South Asian high system, resulting in an East Asia–Pacific (EAP)/Pacific–Japan (PJ) pattern and a tripole distribution of summer precipitation.
• Period 2004–2020: A "north–south reversed" heating pattern over the CETP induced a zonal wave pattern (circumglobal teleconnection (CGT)/Silk Road pattern (SRP)), promoting anomalous cyclonic circulation and a dipole distribution of summer precipitation.

Contributions

• Reveals a significant interdecadal shift in how the thermal effect of the Tibetan Plateau regulates the EASM.
• Demonstrates that the spatial distribution of SH flux, rather than just the magnitude, determines the subsequent atmospheric circulation and precipitation patterns in East Asia.

Funding

Not specified in the provided text.

Citation

@article{Chen2025Adjustment,
  author = {Chen, Yu and Wang, Hui and Zhang, Jie and Chen, Haishan and Chen, Lian and Dong-liang, LI},
  title = {Adjustment of Springtime Thermal Anomaly Modes over the Tibetan Plateau Altered Its Interdecadal Relationship with East Asian Summer Monsoon during the Early 2000s},
  journal = {Journal of Climate},
  year = {2025},
  doi = {10.1175/jcli-d-24-0402.1},
  url = {https://doi.org/10.1175/jcli-d-24-0402.1}
}