A hydrometeorological radar from Météo-France in Vars, France, June 26, 2015. JEAN-PIERRE CLATOT/AFP
Sudden temperature increases sometimes bring good fortune. Did they also help people profit on the American online betting platform Polymarket? That question has arisen since abrupt anomalies were detected in the data from a Météo-France (the French national weather service) sensor that measures temperatures at Paris Charles de Gaulle Airport, in Roissy, north of Paris.
On April 6 and April 15, for several dozen minutes, the data from this particular sensor spiked and showed unusual increases. Around 9:30 pm on April 15, the temperature read 22°C, even though it had been 18°C in the middle of the afternoon, according to Météo-France data recorded by the Infoclimat group. "When the information came out, we all thought it was a sensor malfunction. Later, we suspected a maintenance issue," recalled Sébastien Brana, vice president of Infoclimat, a group that brings together climate observation and data enthusiasts.
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