Analyzing the combined drought index using geospatial technology in the Tigray Region, northern Ethiopia.
Tela YT, Kipkulei HK, Sieber S
Climate Adaptation
PubMedCrops most vulnerable to drought — maize and sorghum — are staple foods for millions of people, and understanding which plants survive dry spells better could shape what farmers around the world grow as climate patterns become less predictable.
Researchers combined multiple satellite measurements — things like plant health, soil moisture, and rainfall — to build a single 'drought score' for a drought-prone region of northern Ethiopia, tracking it over 25 years. They found that drought hits this area constantly, with severe episodes in years like 2009 and 2012. When they checked how crops actually performed during those droughts, ancient grains like teff and barley held up much better than maize and sorghum, which struggled badly when rains were unreliable.
Key Findings
Over 50% of the Tigray region was affected by drought in most years between 2000 and 2024, with moderate drought being the most common category (26–55% of the area per year).
Teff and barley showed strong resilience to water stress, with low prediction errors (MAE = 0.67 and 0.74 respectively), while maize and sorghum were far more vulnerable (MAE = 1.25 and 1.16).
Extreme drought events in 2008 and 2009 caused the most severe damage, and findings were validated against international disaster records, confirming the reliability of the satellite-based drought index.
chevron_right Technical Summary
Scientists used satellite data and AI tools to track drought across Ethiopia's Tigray region over 25 years, finding that more than half the region faces drought conditions in most years. Crops like teff and barley showed stronger resilience to dry conditions than maize and sorghum, which are more vulnerable to erratic rainfall.
Abstract Preview
Drought continues to be a significant environmental challenge in Ethiopia's Tigray Region, posing serious threats to agricultural productivity, food security, and the livelihoods of local communiti...
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Teff, Eragrostis tef, also known as Williams lovegrass and annual bunch grass, is an annual species of lovegrass native to Ethiopia, where it originated in the Ethiopian Highlands. It has been cultivated for its edible seeds, also called teff, since at least 1000 BCE and possibly as long ago as 4...