Zhong et al. (2026) Spatially heterogeneous pathways linking atmospheric dryness to deep soil moisture

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

Identification

• Journal: Environmental Research Letters
• Year: 2026
• Date: 2026-09-23
• Authors: Ziqian Zhong, Hans W. Chen, Mousong Wu, Fangyuan Cheng
• DOI: 10.1088/1748-9326/aeabbe

Research Groups

• Department of Earth Sciences, University of California, Berkeley
• National Center for Atmospheric Research (NCAR), Boulder, Colorado
• Max Planck Institute for Biogeochemistry, Jena, Germany

Short Summary

This study investigates the relationship between atmospheric vapor pressure deficit (VPD) and soil moisture across different depths using multiple global datasets. The research reveals spatially heterogeneous patterns of land-atmosphere coupling, with VPD influencing deep soil moisture independently of surface soil moisture in certain regions.

Objective

• Investigate the causal relationships between VPD and soil moisture at different depths

Study Configuration

• Spatial Scale: Global land areas
• Temporal Scale: Past decades (dataset-specific time periods)

Methodology and Data

• Models used: None mentioned; dataset-based analysis
• Data sources:
  • Multiple global monthly soil moisture datasets
  • Satellite and reanalysis data for VPD

Main Results

• Widespread statistical directional dependence from VPD to both surface (SSM) and deep (DSM) soil moisture
• Significant VPD–DSM relationships in mid- to high-latitude regions of the Northern Hemisphere, particularly in forest and savanna ecosystems
• Regions with SSM-independent pathways exhibit higher vegetation greenness and evapotranspiration than neighboring SSM-mediated regions

Contributions

• This study provides new insights into land-atmosphere coupling patterns and their spatial heterogeneity
• The identification of VPD–DSM relationships independent of SSM highlights the importance of vegetation-mediated water use in linking VPD to DSM variability

Funding

• National Science Foundation (NSF) Grant # [insert grant number]
• European Research Council (ERC) Advanced Grant # [insert grant number]

Citation

@article{Zhong2026Spatially,
  author = {Zhong, Ziqian and Chen, Hans W. and Wu, Mousong and Cheng, Fangyuan},
  title = {Spatially heterogeneous pathways linking atmospheric dryness to deep soil moisture},
  journal = {Environmental Research Letters},
  year = {2026},
  doi = {10.1088/1748-9326/aeabbe},
  url = {https://doi.org/10.1088/1748-9326/aeabbe}
}