Ma et al. (2025) Geographical analysis of the factors influencing pyrocumulonimbus and their regional differences over temperate southeast Australia

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Identification

• Journal: Geomatics Natural Hazards and Risk
• Year: 2025
• Date: 2025-12-03
• Authors: Wenyuan Ma, Jason J. Sharples, Caleb S. Wilson, Zlatko Jovanoski
• DOI: 10.1080/19475705.2025.2594093

Research Groups

Not specified in the provided text.

Short Summary

This study statistically analyzed pyroCb drivers and occurrence patterns in temperate southeastern Australia from 1980 to 2020, revealing significant regional variations and identifying atmospheric variables, particularly the continuous Haines (C-Haines) index, as the most influential factors.

Objective

• To statistically analyze the drivers and occurrence patterns of pyrocumulonimbus (pyroCb) at larger scales in temperate southeastern Australia.
• To test a selection of previously associated predictors, rank their relative importance, and assess regional differences in pyroCb occurrence.

Study Configuration

• Spatial Scale: Temperate southeastern Australia
• Temporal Scale: 1980 to 2020 (41 years)

Methodology and Data

• Models used: Global logistic regression, Geographically Weighted Regression (GWR) models
• Data sources: Extracted atmospheric conditions, surface fire weather variables, topography, and vegetation type data.

Main Results

• Significant regional variations exist in pyroCb drivers, demonstrating considerable spatial heterogeneity in the influence of different variables on pyroCb occurrence.
• Atmospheric variables provide the best explanation for pyroCb occurrence patterns.
• Topographic variables are the second most important explanatory factors.
• The continuous Haines (C-Haines) index is identified as the most important factor influencing pyroCb occurrence.

Contributions

• Provides the first large-scale statistical analysis of pyroCb drivers and occurrence patterns, addressing a gap in previous descriptive or simulation-focused studies.
• Deepens the understanding of factors influencing pyroCb occurrence by quantifying the relative importance of various predictors and highlighting regional heterogeneity.
• Offers valuable insights for future pyroCb risk assessment and strategic disaster management.

Funding

Not specified in the provided text.

Citation

@article{Ma2025Geographical,
  author = {Ma, Wenyuan and Sharples, Jason J. and Wilson, Caleb S. and Jovanoski, Zlatko},
  title = {Geographical analysis of the factors influencing pyrocumulonimbus and their regional differences over temperate southeast Australia},
  journal = {Geomatics Natural Hazards and Risk},
  year = {2025},
  doi = {10.1080/19475705.2025.2594093},
  url = {https://doi.org/10.1080/19475705.2025.2594093}
}