Zheng et al. (2025) Earlier snowmelt is driving the northward migration of East Asian Sand and Dust Storms

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Identification

• Journal: GIScience & Remote Sensing
• Year: 2025
• Date: 2025-12-27
• Authors: Lilin Zheng, Xia Lin, Annah Lake Zhu, Ruishan Chen, Ling Wang
• DOI: 10.1080/15481603.2025.2604385

Research Groups

Not explicitly stated in the provided text.

Short Summary

This study analyzed sand and dust storm (SDS) patterns in East Asia from 2001–2024, revealing a northward migration primarily driven by reduced winter snow cover and earlier snowmelt in sparsely vegetated regions, while vegetation remains dominant in highly vegetated areas.

Objective

• To analyze the exact spatiotemporal patterns and mechanisms driving shifts in sand and dust storm patterns across East Asia.

Study Configuration

• Spatial Scale: East Asia, with a focus on northern China and southern Mongolia.
• Temporal Scale: 2001–2024, using daily observations.

Methodology and Data

• Models used: Partial-correlation analyses, generalized linear models, structural equation modeling.
• Data sources: Daily meteorological observations, satellite aerosol products (to derive dust optical depth, SDS frequency, and related indices).

Main Results

• Sand and dust storm (SDS) activity is concentrated in northern China and southern Mongolia and exhibits a clear northward migration.
• In sparsely vegetated regions, pre-season snow cover exerts a stronger negative control on spring dust activity than vegetation cover.
• Soil moisture generated from late winter snow cover is the primary factor mitigating dust generation in low-vegetated regions, with wind speed remaining a contributing, but vegetation-independent, factor.
• In highly vegetated regions, vegetation is the dominant dust suppression mechanism, primarily through attenuating wind speed.
• The observed northward shift in SDS is primarily driven by reduced winter snow cover and earlier snowmelt under warming, rather than insufficient afforestation.

Contributions

• Provides a detailed spatiotemporal analysis of sand and dust storm shifts in East Asia over two decades.
• Identifies cryospheric changes (reduced winter snow cover and earlier snowmelt) as a pivotal and primary driver for the northward migration of SDS, particularly in sparsely vegetated regions.
• Challenges the singular focus on afforestation by highlighting the significant role of snow cover in modulating aeolian processes.

Funding

Not explicitly stated in the provided text.

Citation

@article{Zheng2025Earlier,
  author = {Zheng, Lilin and Lin, Xia and Zhu, Annah Lake and Chen, Ruishan and Wang, Ling},
  title = {Earlier snowmelt is driving the northward migration of East Asian Sand and Dust Storms},
  journal = {GIScience & Remote Sensing},
  year = {2025},
  doi = {10.1080/15481603.2025.2604385},
  url = {https://doi.org/10.1080/15481603.2025.2604385}
}