terclim by ICS banner
IVES 9 IVES Conference Series 9 Mesoclimate impact on Tannat in the Atlantic terroir of Uruguay

Mesoclimate impact on Tannat in the Atlantic terroir of Uruguay

Abstract

The study of climate is relevant as an element conditioning the typicity of a product, its quality and sustainability over the years. The grapevine development and growth and the final grape and wine composition are closely related to temperature, while climate components vary at mesoscale according to topography and/or proximity to large bodies of water. The objective of this work is to assess the mesoclimate of the Atlantic region of Uruguay and to determine the effect of topography and the ocean on temperature and consequently on Tannat grapevine behavior. For this purpose, an automatic weather station and a network of 19 temperature sensors were installed in 2018 in plots of a commercial vineyard in contrasting topographic situations. Nine sensors correspond to Tannat plots. Based on the climatic data for 2018-19 and 2019-20 growing seasons, bioindicators for grapevine were calculated and relationships between site topography and plant response were analyzed. Temporal climate variability between the two growing seasons is explained by rainfall and spatial variability was associated with plots’ topography. Altitude was the main feature that statistically differentiated the plots’ temperature. The effect was observed on thermal amplitude, Cool Night Index, number of days above 30 °C and maximum summer temperature. During the summer of the warmest growing season (2019-20), at 14:00 LH the average thermal difference was -1.7 °C in favor of higher altitude (140 masl) compared to lower altitude (70 masl). The main factor conditioning this result was the ocean proximity and exposure to sea breeze air circulation. Plots in higher elevations favored grapes with higher malic acid content, while lower elevations showed berries with higher amounts of secondary metabolites. This study provides knowledge about Tannat behavior under ocean condition and in a complex region which could be of value to adapt sustainable viticulture techniques.

DOI:

Publication date: May 31, 2022

Issue: Terclim 2022

Type: Article

Authors

Ramiro Tachini1, Milka Ferrer1, Valérie Bonnardot2, Martin Fanzone3 and Mercedes Fourment1

1Facultad de Agronomía, Universidad de la República Oriental del Uruguay. Montevideo, Uruguay
2University Rennes 2, LETG-UMR 6554 CNRS, Rennes, France
3Estación Experimental Agropecuaria Mendoza, Instituto Nacional de Tecnología Agropecuaria (INTA), Mendoza, Argentina

Contact the author

Keywords

mesoclimate, South America, Oceanic wine region, Tannat, grape composition

Tags

IVES Conference Series | Terclim 2022

Citation

Related articles…

ALCOHOLIC FERMENTATION DRIVES THE SELECTION OF OENOCOCCUS OENI STRAINS IN WINE

Oenococcus oeni is the predominant lactic acid bacteria species in wine and cider, where it performs the malolactic fermentation (MLF) (Lonvaud-Funel, 1999). The O. oeni strains analyzed to date form four major genetic lineages named phylogroups A, B, C and D (Lorentzen et al., 2019). Most of the strains isolated from wine, cider, or kombucha belong to phylogroups A, B+C, and D, respectively, although B and C strains were also detected in wine (Campbell-Sills et al., 2015; Coton et al., 2017; Lorentzen et al., 2019;

Comparing vineyard irrigation management based in two different approaches: vegetation indices and SIMDualKc model

Water scarcity, high air temperatures, high vapor pressure deficit, and increasing frequency and intensity of extreme climatic events, namely heat waves, exert huge pressure on viticulture, as is the case of Mediterranean climates. Therefore, farmers rely more and more on irrigation to overcome these constraints. Deficit irrigation is a proved strategy to optimize irrigation efficiency and wine quality. The present study intends to demonstrate the application of precision techniques, namely remote sensing derived vegetation indices (VI) and an open source software, SIMDualKc, to compute crop evapotranspiration using the dual crop coefficient approach (Kcb + Ke), for deficit irrigation management.

Grafting, the most sustainable way to control phylloxera over 150 years

Just over 150 years ago, phylloxera, daktulosphaera vitifoliae, was introduced to europe, and particularly france, from north america via imports of american vitis plants. This aphid, with its complex biology and life cycle, has spread rapidly to most vineyards, causing rapid and lethal decline of v. Vinifera vines due to the primary and secondary damage it causes to the roots. In response to this pest, and given the economic importance of the french wine sector, professional representatives organised into ‘agricultural societies’, scientists and public authorities rallied together to identify the exact causes, seek solutions and try to stem the serious socio-economic crisis that ensued.

Optimizing vine pruning of Pinot noir and Müller-Thurgau after extreme hail damage

Hail damage can have a major impact on the vine’s physiological growth (defoliation, wood and cane damage) and can lead to significant yield and economic losses.

Impact of dosage sugar-type and ageing on finished sparkling wine composition and development of Maillard reaction-associated compounds

The Maillard reaction (MR) is a non-enzymatic reaction between reducing sugars and amino acids, resulting in the production of volatile and flavour-active compounds.