Malbecs from Argentina and California made by the same winemaker and using the same protocol had distinct molecular signatures and flavours.
 
But the delicate aroma of a rare vintage can quickly be eroded by poor storage after bottling, the team said.
Details were reported at the American Chemical Society meeting.
 
Despite the cynicism over wine critique – and the rather grandiose adjectives lavished upon certain appellations – it really does matter where your plonk comes from, according to the researchers from the University of California Davis.
 
They are attempting to fingerprint “terroir” – the unique characteristics that the geography, geology and climate of a certain place bestows upon a wine.
 
Subjective regional character is based on the appearance, aroma, taste and mouthfeel (texture) of the wine – all of which combine to create its flavour.
 
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