Terroir 2016 banner
IVES 9 IVES Conference Series 9 Talking about terroir

Talking about terroir

Abstract

When talking about terroir, scientists and lay wine tasters, very much including wine journalists and wine growers, too often talk past one another.

“Terroir” may be among the most irritatingly vague and slippery words in the wine growers’ and wine critic’s vocabulary, but scientists, too, seem conspicuously unwilling to render this notion more precise; and if a shared and mutually useful concept cannot be achieved, how can we reach genuine agreement or disagreement in our claims about terroir, let alone address or mitigate one another’s perplexity?

Moreover, it often appears as if parties to alleged explications of terroir fail even to agree on the phenomenon that demands explanation. Wine tasters are frustrated with scientists who make no attempt to account for but instead treat as implausible or debunk claims for organoleptic experience of wine as varying with regularity and predictability depending on site and soil type. Entire books have been written about vineyard geology under the rubric of terroir without accounting for how rocks might actually influence taste. Specialists often advise on where best to plant wine grapes seemingly oblivious that “best” can make sense only if location somehow ultimately influences taste. Yet scientists can be forgiven their frustration with and dismissals of utterly implausible pictures that wine tasters have painted for themselves about how soil and site might influence taste.

Examples will be offered of some common conceptual pitfalls into which both scientists and laity stumble when discussing “terroir.” Treating this term as by its nature evaluative undermines attempts to define site potential; treating it as encompassing anything that might impinge on the eventual character of wine including viticultural and cellar practices renders it so all-encompassing that it fails to mark any significant distinction. Positing something called “minerality in wine” trades on equivocation and conceptual muddle.

It will be proposed that “terroir” be defined as those constraints placed on (or opportunities afforded) a vintner and the eventual flavors of his or her wine by the location in which that wine was grown. Several senses of terroir influence consistent with that definition will be explicated, each differing in scope and in the role assigned to grape variety and vine genetics. It will be argued that the notion of wine as exhibiting terroir character and tasters’ ability to discern characteristics causally associated with site are neither more nor less problematic than the analogous notion of vintage character or its identification as predicated on the influence of weather on vine metabolism, fruit maturation and ultimately flavor. It will be suggested that much more scientific research should be devoted to measuring how much or how little such ability tasters can develop, as opposed to imagine themselves possessing, because this will circumscribe investigations into how site influences flavor and determine how relevant place is to pedigree.

DOI:

Publication date: June 23, 2020

Issue: Terroir 2016

Type: Article

Authors

David Schildknecht

Wine Writer, The Wine Advocate and other wine publications, USA

Contact the author

Keywords

Touriga Nacional; Touriga Franca; Climate Change; Summer Stress; Douro Region; Morpho Anatomy; Biochemistry

Tags

IVES Conference Series | Terroir 2016

Citation

Related articles…

Terroir analysis and its complexity

Terroir is not only a geographical site, but it is a more complex concept able to express the “collective knowledge of the interactions” between the environment and the vines mediated through human action and “providing distinctive characteristics” to the final product (OIV 2010). It is often treated and accepted as a “black box”, in which the relationships between wine and its origin have not been clearly explained. Nevertheless, it is well known that terroir expression is strongly dependent on the physical environment, and in particular on the interaction between soil-plant and atmosphere system, which influences the grapevine responses, grapes composition and wine quality. The Terroir studying and mapping are based on viticultural zoning procedures, obtained with different levels of know-how, at different spatial and temporal scales, empiricism and complexity in the description of involved bio-physical processes, and integrating or not the multidisciplinary nature of the terroir. The scientific understanding of the mechanisms ruling both the vineyard variability and the quality of grapes is one of the most important scientific focuses of terroir research. In fact, this know-how is crucial for supporting the analysis of climate change impacts on terroir resilience, identifying new promised lands for viticulture, and driving vineyard management toward a target oenological goal. In this contribution, an overview of the last findings in terroir studies and approaches will be shown with special attention to the terroir resilience analysis to climate change, facing the use and abuse of terroir concept and new technology able to support it and identifying the terroir zones.

Phenolic composition of Tempranillo Blanco grapes changes after foliar application of urea

Our research aimed to determine the effect and efficiency of foliar application of urea on the phenolic composition of Tempranillo Blanco grapes. The field experiment was carried out in 2019 and 2020 seasons and the plot was located in D.O.Ca Rioja (North of Spain). The vineyard was Vitis vinifera L. Tempranillo Blanco and grafted on Richter-110 rootstock. The treatments were control (C), whose plants were sprayed with water and three doses of urea: plants were sprayed with urea 3 kg N/ha (U3), 6 kg N/ha (U6) and 9 kg N/ha (U9). The applications were performed in two phenological stages, pre-veraison (Pre) and veraison (Ver). Also, each of the treatments was repeated one week later. Control and treatments were performed in triplicate and arranged in a randomised block design. Grapes were harvested at optimum ripening stage. High-performance liquid chromatography was used to analyse the phenolic composition of the grapes. Finally, the results obtained from the analytical determinations – flavonols, flavanols and non-flavonoid (hydroxybenzoic acids, hydroxycinnamic acids and stilbenes) – were studied statistically by analysis of variance. The results showed that, in 2019, U6-Pre and U9-Pre treatments increased the hydroxybenzoic acid content in grapes, and also all foliar treatments applied at Pre enhanced the stilbene concentration. Moreover, U3-Ver was the only treatment that rose flavonol and stilbene contents in the Tempranillo Blanco grapes. In 2020, all treatments applied at Pre enhanced the flavonol concentration in grapes. Furthermore, U3-Pre and U9-Pre treatments increased stilbene content in grapes. Nevertheless, the hydroxybenzoic acid content was improved by U6-Ver and U9-Ver and besides, hydroxycinnamic acid concentration in grapes was increased by all treatments applied at Ver. In conclusion, the lower and highest dose of urea (U3 and U9), applied at pre-veraison, were the best treatments to improve the Tempranillo Blanco grape phenolic composition.

Mesoclimate impact on Tannat in the Atlantic terroir of Uruguay

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.

Rapid damage assessment and grapevine recovery after fire

There is increasing scientific consensus that climate changeis the underlying cause of the prolonged dry and hot conditions that have increased the risk of extreme fire weather in many countries around the world. In December 2019, a bushfire event occurred in the Adelaide Hills, South Australia where 25,000 hectares were burnt and in vineyards and surrounding areas various degrees of scorching and infrastructure damage occurred. The ability to coordinate and plan recovery after a fire event relies on robust and timely data. The current practice for measuring the scale and distribution of fire damage is to walk or drive the vineyard and score individual vines based on visual observation. The process is time consuming, subjective, or semi-quantitative at best. After the December 2019 fires, it took many months to access properties and estimate the area of vineyard damaged. This study compares the rapid assessment and mapping of fire damage using high-resolution satellite imagery with more traditional ground based measures. Satellite imagery tracking vineyard recovery in the season following the bushfire is being correlated to field assessments of vineyard productivity such as canopy health and development, fertility and carbohydrate storage. Canopy health in the seasons following the fires correlated to the severity of the initial fire damage. Severely damaged vines had reduced canopy growth, were infertile or had very low fertility as well as lower carbohydrate levels in buds and canes during dormancy, which reduced productivity in the seasons following the bushfire event. In contrast, vines that received minor damage were able to recover within 1-2 years. Tools that rapidly and affordably capture the extent and severity of damage over large vineyard area will allow producers, government and industry bodies to manage decisions in relation to fire recovery planning, coordination and delivery, improving the efficiency and effectiveness of their response.

Effects of graft quality on growth and grapevine-water relations

Climate change is challenging viticulture worldwide compromising its sustainability due to warmer temperatures and the increased frequency of extreme events. Grafting Vitis vinifera L.