May 6, 2026
Veriground™ vs. ERA5 Precipitation Data in Cocoa Growing Regions: Comparisons, Contrasts, and Conclusions
This study looks at daily rainfall information from two different weather sources in selected cocoa-growing areas, covering the period from January 2020 to February 2026. The two sources gather rainfall information in very different ways. The first source, Veriground, collects rainfall measurements directly from small weather stations placed in specific locations. These stations record rainfall and regularly send information to online data systems throughout the day. The second source, called ERA5, does not measure rainfall directly at the ground level. Instead, it combines satellite observations, past rainfall records, and computer models to estimate how much rain falls over specific geographic areas. The study focused on two main questions. First, it examined how closely the two sources agree when reporting rainfall in the same locations at the same time. Second, it explored whether information from both sources could be combined in a way to provide faster and more accurate rainfall information for cocoa-growing regions. To answer these questions, the researchers compared the data using summary statistics, how rainfall amounts were distributed, and statistical tests that measure how closely the two data sets are related. The results showed that the two sources describe rainfall very differently for the same regions and time periods. Because of these large differences, the study found no reliable way to combine the two data sources to improve rainfall estimates.
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