ECMWF ERA-Interim Reanalysis Accuracy for Water Deficiency in Paraná, Brazil (1989-2014)

ERA-Interim reanalysis air temperature data showed high accuracy for Paraná State, with MAPE > 5% and bias < 2°C across all seasons. The study by Lucas Eduardo de Oliveira Aparecido compared 10-day and monthly temperature and rainfall data from 1989 to 2014 against surface station data (INMET). Rainfall data from the reanalysis consistently underestimated observations in several macro-regions, showing low accuracy with R² ≅ 0 and high MAPE (> 15%).

Use Cases

• Evaluate reanalysis data accuracy for temperature and precipitation based on comparison with surface station data.
• Model climatological water balance using the Thornthwaite and Mather (1955) method based on the described meteorological inputs.
• Assess spatial and seasonal variations in data accuracy across macro-regions of Paraná, Brazil.
• Correct systematic biases in ERA-Interim precipitation data for hydrological applications in specific regions.

Strengths

• Evaluation spans 25 years (1989-2014), providing a long-term accuracy assessment.
• Data was stratified by macro-regions and seasons for a more careful evaluation.
• Accuracy was quantified using specific statistical indexes (MAPE, R²) and the Tukey test.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Last update date is unknown; freshness unverified.

Provenance

Source

ECMWF ERA-Interim reanalysis and INMET surface station data.

Collection Method

Comparative analysis using accuracy, precision, and trend evaluation indexes.

Time Range

1989 to 2014

Geography

Paraná State, Brazil, stratified by macro-regions.