Daily McArthur Drought Factor for historical conditions

The McArthur Drought Factor (McADF) is a drought indicator developed specifically to describe how recent precipitation patterns influence fire potential in forested areas. McADF calculations are based on McArthur (1967) and Finkele et al. (2006), and are dependent on air temperature, recent precipitation, and long-term precipitation patterns. The metric was developed as a component of the Forest Fire Danger Index, where values range from 0 to 10, with 10 representing extreme drought conditions.

This dataset provides daily time series of McADF values across the Australian landscape from January 1979 to July 2022. Calculations are based on the Bureau of Meteorology’s BARRA-R2 historical weather reanalysis (Su et al., 2022), using concurrent hourly weather conditions at approximately 11 km spatial resolution. These conditions are used to calculate the daily Keetch-Byram Drought Index and daily rain events following the Finkele et al. (2006) formulation. A coastal correction is applied to ensure that mixed land–sea grid cells report values representative of land-based conditions.

This dataset is research-grade and is provided solely for scientific and academic research purposes. It is not intended for operational, commercial, or decision-making use.

麦克阿瑟干旱因子（McArthur Drought Factor, McADF）是专为描述近期降水格局如何影响森林区域火灾潜势而开发的干旱指标。其计算方法基于McArthur（1967）与Finkele等人（2006）的研究成果，依赖气温、近期降水及长期降水格局三类参数。该指标作为森林火灾危险指数（Forest Fire Danger Index）的组成部分被开发，数值区间为0至10，其中10代表极端干旱状态。

本数据集涵盖1979年1月至2022年7月期间澳大利亚全域的McADF日时间序列数据。其计算依托澳大利亚气象局（Bureau of Meteorology）发布的BARRA-R2历史天气再分析资料（Su等人，2022），采用约11公里空间分辨率的逐小时同步气象条件。基于Finkele等人（2006）的公式，利用上述气象条件可计算得到每日Keetch-Byram干旱指数（Keetch-Byram Drought Index）与每日降水事件。针对海陆混合的沿海网格单元，本数据集应用了海岸校正方法，以确保其输出值能够代表陆地站点的气象条件。

本数据集为科研级数据，仅面向科学与学术研究用途提供，不得用于业务运行、商业活动或决策制定场景。