Liu et al. (2025) Precession Affects the Timing and Duration of Summer and Rainy Season in East Asia

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

Identification

• Journal: Geophysical Research Letters
• Year: 2025
• Date: 2025-10-13
• Authors: Hu Yang, Xiaoxu Shi, Hang Wang, Haiwei Zhang, Dake Chen
• DOI: 10.1029/2025gl116963

Research Groups

Alfred Wegener Institute (AWI)

Short Summary

This study uses an Earth System Model to reconstruct a full precession cycle, revealing how precession significantly impacts the timing and duration of the East Asian summer and rainy season due to changes in perihelion timing, surface temperature, and subtropical high system shifts.

Objective

• To examine how precession impacts the timing and duration of the East Asian summer and rainy season.

Study Configuration

• Spatial Scale: East Asia (subtropical regions)
• Temporal Scale: A full precession cycle (orbital scale)

Methodology and Data

• Models used: Alfred Wegener Institute Earth System Model
• Data sources: Model reconstruction of a full precession cycle

Main Results

• In a precession cycle with high eccentricity, summer duration varies by up to 57 days.
• Summer onset shifts by up to 48 days, and termination shifts by up to 52 days.
• The rainy season duration varies by up to 21 days.
• Rainy season onset shifts by up to 31 days, and termination shifts by up to 35 days.
• These changes are attributed to precession-modulated perihelion timing, which affects surface temperature and the meridional shift in the subtropical high system.

Contributions

• Refines interpretations of complex paleoclimate proxies.
• Offers insights into precession-driven climate dynamics in subtropical regions.
• Supports future climate projections.

Funding

Not specified in the abstract.

Citation

@article{Liu2025Precession,
  author = {Liu, Tingting and Yang, Hu and Shi, Xiaoxu and Wang, Hang and Zhang, Haiwei and Chen, Dake},
  title = {Precession Affects the Timing and Duration of Summer and Rainy Season in East Asia},
  journal = {Geophysical Research Letters},
  year = {2025},
  doi = {10.1029/2025gl116963},
  url = {https://doi.org/10.1029/2025gl116963}
}