Martinique: Subnational Dekadal Rainfall and Anomalies (CHIRPS)

The World Food Programme (WFP) provides dekadal rainfall indicators for Martinique's subnational units based on CHIRPS v2 satellite imagery and CHIRPS-GEFS forecasts. The data includes 10-day, 1-month, and 3-month aggregations alongside long-term averages and anomaly percentages. Updates occur up to six times per month to transition from forecasts to final observations.

Use Cases

• Monitoring drought conditions using rainfall anomaly percentages (rfq, r1q, r3q)
• Comparing current 10-day rainfall (rfh) against historical averages (rfh_avg) for agricultural planning
• Analyzing the accuracy of short-term forecasts by comparing 'forecast' and 'final' entries in the type column

Strengths

• Uses CHIRPS v2 which blends satellite data with in-situ station observations
• Includes WFP Pcode references for standardized subnational mapping
• Provides pixel counts (n_pixels) to indicate the data density of each aggregate

Limitations

• Satellite-derived precipitation estimates may have biases in mountainous regions
• Data is aggregated to 10-day dekads, masking daily rainfall intensity

Provenance

Source

World Food Programme (WFP) using CHIRPS v2 and CHIRPS-GEFS

Collection Method

Aggregated from satellite imagery and in-situ station data

Freshness

Updated frequently; forecasts and observations are released on a cycle including the 1st, 6th, 11th, 16th, 21st, and 26th of each month.

Geography

Martinique