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…

Making sense of available information for climate change adaptation and building resilience into wine production systems across the world

Effects of climate change on viticulture systems and winemaking processes are being felt across the world. The IPCC 6thAssessment Report concluded widespread and rapid changes have occurred, the scale of recent changes being unprecedented over many centuries to many thousands of years. These changes will continue under all emission scenarios considered, including increases in frequency and intensity of hot extremes, heatwaves, heavy precipitation and droughts. Wine companies need tools and models allowing to peer into the future and identify the moment for intervention and measures for mitigation and/or avoidance. Previously, we presented conceptual guidelines for a 5-stage framework for defining adaptation strategies for wine businesses. That framework allows for direct comparison of different solutions to mitigate perceived climate change risks. Recent global climatic evolution and multiple reports of severe events since then (smoke taint, heatwave and droughts, frost, hail and floods, rising sea levels) imply urgency in providing effective tools to tackle the multiple perceived risks. A coordinated drive towards a higher level of resilience is therefore required. Recent publications such as the Australian Wine Future Climate Atlas and results from projects such as H2020 MED-GOLD inform on expected climate change impacts to the wine sector, foreseeing the climate to expect at regional and vineyard scale in coming decades. We present examples of practical application of the Climate Change Adaptation Framework (CCAF) to impacts affecting wine production in two wine regions: Barossa (Australia) and Douro (Portugal). We demonstrate feasibility of the framework for climate adaptation from available data and tools to estimate historical climate-induced profitability loss, to project it in the future and to identify critical moments when disruptions may occur if timely measures are not implemented. Finally, we discuss adaptation measures and respective timeframes for successful mitigation of disruptive risk while enhancing resilience of wine systems.

Different soil types and relief influence the quality of Merlot grapes in a relatively small area in the Vipava Valley (Slovenia) in relation to the vine water status

Besides location and microclimatic conditions, soil plays an important role in the quality of grapes and wine. Soil properties influence…

Rootstock regulation of scion phenotypes: the relationship between rootstock parentage and petiole mineral concentration

Grapevine is grown as a graft since the end of the 19th century. Rootstocks not only provide tolerance to Phylloxera but also ensure the supply of water and mineral nutrients to the scion. Rootstocks are an important mean of adaptation to environmental conditions, because the scion controls the typical features of the grapes and wine. However, among the large diversity of rootstocks worldwide, few of them are commercially used in the vineyard. The aim of this study was to investigate the extent to which rootstocks modify the mineral composition of the petioles of the scion. Vitis vinifera cvs. Cabernet-Sauvignon, Pinot noir, Syrah and Ugni blanc were grafted onto 55 different rootstock genotypes and planted in a vineyard as three replicates of 5 vines. Petioles were collected in the cluster zone with 6 replicates per combination. Petiolar concentrations of 13 mineral elements (N, P, K, S, Mg, Ca, Na, B, Zn, Mn, Fe, Cu, Al) at veraison were determined. Scion, rootstock and the interaction explained the same proportion of the phenotypic variance for most mineral elements. Rootstock genotype showed a significant influence on the petiole mineral element composition. Rootstock effect explained from 7 % for Cu to 25 % for S of the variance. The difference of rootstock conferred mineral status is discussed in relation to vigor and fertility. Rootstocks were also genotyped with 23 microsatellite markers. Data were analysed according to genetic groups in order to determine whether the petiole mineral composition could be related to the genetic parentage of the rootstock. Thanks to a highly powerful design, it is the first time that such a large panel of rootstocks grafted with 4 scions has been studied. These results give the opportunity to better characterize the rootstocks and to enlarge the diversity used in the vineyard.

Delaying irrigation initiation linearly reduces yield with little impact on maturity in Pinot noir

When to initiate irrigation is a critical annual management decision that has cascading effects on grapevine productivity and wine quality in the context of climate change. A multi-site trial was begun in 2021 to optimize irrigation initiation timing using midday stem water potential (ψstem) thresholds characterized as departures from non-stressed baseline ψstemvalues (Δψstem). Plant material, vine and row spacing, and trellising systems were concomitant among sites, while vine age, soil type, and pruning systems varied. Five target Δψstem thresholds were arranged in an RCBD and replicated eight times at each site: 0.2, 0.4, 0.6, 0.8, and 1.0 MPa (T1, T2, T3, T4, and T5, respectively). When thresholds were reached, plots were irrigated weekly at 70% ETc. Yield components and berry composition were quantified at harvest. To better generalize inferences across sites, data were analyzed by ANOVA using a mixed model including site as a random factor. Across sites, irrigation was initiated at Δψstem = 0.24, 0.50, 0.65, 0.93, and 0.98 MPa for T1, T2, T3, T4, and T5, respectively. Consistent significant negative linear trends were found for several key yield and berry composition variables. Yield decreased by 12.9, 15.9, 19.5, and 27.4% for T2, T3, T4, and T5, respectively, compared to T1 (p < 0.0001) across sites that were driven by similarly linear reductions in berry weight (p < 0.0001). Comparatively, berry composition varied little among treatments. Juice total soluble solids decreased linearly from T1 to T5 – though only ranged 0.9 Brix (p = 0.012). Because producers are paid by the ton, and contracts simply stipulate a target maturity level, first-year results suggest that there is no economic incentive to induce moderate water deficits before irrigation initiation, regardless of vineyard site. Subsequent years will further elucidate the carryover effects of delaying irrigation initiation on productivity over the long term.

A predictive model of spatial Eca variability in the vineyard to support the monitoring of plant status

[lwp_divi_breadcrumbs home_text="IVES" use_before_icon="on" before_icon="||divi||400" module_id="publication-ariane" _builder_version="4.19.4" _module_preset="default" module_text_align="center" module_font_size="16px" text_orientation="center"...