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Projected changes in the Rioja DOCa vines under climate change scenarios

María Concepción Ramos, Fernando Martínez de Toda, University of Lleida, ICVV, Spain

Projected changes in the Rioja DOCa vines under climate change scenarios

The Rioja DOCa is one of the viticulture areas in Spain with a long tradition. The present designation of origin Rioja was approved in 1926 and the status of Qualified Denomination of Origin 'Rioja' (DOCa Rioja) was given in 1991. The main cultivated variety is Tempranillo, which covers about 85% of the vineyard surface, followed by Grenache, which occupies about 10%. Both varieties are well adapted to the present conditions as proven by the quality of the wines. However, climate change could affect their suitability in the areas where they are cultivated at present.

The research evaluates the impact of increasing temperatures that can occur under different climate change scenarios, on phenology and on grape composition. The vine response at present in its relationship with different climatic variables was considered a predictor of potential changes.

The results of the study concluded that temperature changes predicted under different emission scenarios project an advance of all phenological stages, being greater for veraison and maturation than for flowering. The increase in temperature will lead to a decrease in the acidity (both total acidity and malic acid) and in the anthocyanins, and may affect the sugar/ anthocyanins balance when harvesting takes place in warmer conditions.

Article based on the paper presented at the 1st  edition of Enforum Web (5-7 May 2020)

Published on 02/09/2021
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