Chen et al. (2025) Vegetation growth carryover and lagged climatic effect at Juniperus seravschanica different scales: From tree rings to remote sensing data

Identification

• Journal: Dendrochronologia
• Year: 2025
• Date: 2025-07-17
• Authors: Jiuqi Chen, Yonghui Wang, Tongwen Zhang, Kexiang Liu, Shulong Yu, Kailong Guo, Zhihao He, Bing Liang
• DOI: 10.1016/j.dendro.2025.126393

Research Groups

• School of Geography and Tourism, Xinjiang Normal University
• Institute of Desert Meteorology, China Meteorological Administration
• Key Laboratory of Tree-ring Physical and Chemical Research, China Meteorological Administration
• College of Geography and Remote Sensing Sciences, Xinjiang University

Short Summary

This study examines the impacts of vegetation growth carryover (VGC) and lagged climate effects (LCE) on Juniperus seravschanica in Tajikistan. The results indicate that both VGC and LCE are more pronounced in tree-ring width than in remote sensing indices and that these two mechanisms operate independently.

Objective

• To analyze the intensity and duration of vegetation growth carryover (VGC) and lagged climate effects (LCE) on Juniperus seravschanica using multi-scale indicators (tree-ring width and enhanced vegetation index).

Study Configuration

• Spatial Scale: Regional (Tajikistan, focusing on Juniperus seravschanica).
• Temporal Scale: Multi-year analysis with a specific focus on lag effects within a 0–3 year window.

Methodology and Data

• Models used: Vector autoregression (VAR) model.
• Data sources: Tree-ring width (TRW) and Enhanced Vegetation Index (EVI) from remote sensing.

Main Results

• Scale Sensitivity: Both VGC and LCE effects were significantly stronger in TRW (tree-ring width) than in EVI (enhanced vegetation index).
• Temporal Lag: The peak intensity of LCE responses occurred within a lag period of 0–3 years.
• Relative Contribution: VGC generally exerted a stronger influence on vegetation growth than LCE, except in the case of ZTW (EVI).
• Mechanism Interaction: VGC and LCE were found to be decoupled, meaning their influences on vegetation growth are independent of one another.

Contributions

• The study provides a comprehensive perspective on vegetation dynamics by integrating high-resolution biological data (tree rings) with broad-scale remote sensing data.
• It clarifies the distinction between growth legacy (VGC) and delayed climatic responses (LCE), offering insights into how Juniperus seravschanica adapts to harsh environmental conditions in arid regions.

Funding

• Not specified in the provided text.

Citation

@article{Chen2025Vegetation,
  author = {Chen, Jiuqi and Wang, Yonghui and Zhang, Tongwen and Liu, Kexiang and Yu, Shulong and Guo, Kailong and He, Zhihao and Liang, Bing},
  title = {Vegetation growth carryover and lagged climatic effect at Juniperus seravschanica different scales: From tree rings to remote sensing data},
  journal = {Dendrochronologia},
  year = {2025},
  doi = {10.1016/j.dendro.2025.126393},
  url = {https://doi.org/10.1016/j.dendro.2025.126393}
}