Can We Use Satellite-Based FAPAR to Detect Drought?

Area of Science:

• Earth Observation
• Climate Science
• Agricultural Science

Background:

• Drought significantly impacts Australian agriculture and ecosystems.
• Satellite-derived Fraction of Absorbed Photosynthetically Active Radiation (FAPAR) is crucial for monitoring vegetation health.
• Existing FAPAR datasets exhibit discrepancies due to varied retrieval methods.

Purpose of the Study:

• To evaluate the effectiveness of the Quality Assurance for Essential Climate Variables (QA4ECV) FAPAR dataset for drought monitoring in Australia.
• To assess the QA4ECV FAPAR's capability in tracking vegetation greenness and health during drought periods.

Main Methods:

• Spatial and temporal comparison of QA4ECV FAPAR with MODIS, SPOT/PROBA-V FAPAR (CGLS), SPEI drought index, and ESA CCI soil moisture.
• Correlation analysis to validate QA4ECV FAPAR performance against established drought indicators and satellite products.

Main Results:

• The QA4ECV FAPAR demonstrates significant capability in supporting agricultural drought monitoring and assessment across Australia.
• The dataset shows strong correlations with other FAPAR products and drought indices, validating its utility.

Conclusions:

• The QA4ECV FAPAR is a valuable tool for drought impact assessment in Australia.
• Traceable uncertainties in the QA4ECV FAPAR dataset enhance its reliability for future applications in climate and agricultural monitoring.