Terroir 2020 banner
IVES 9 IVES Conference Series 9 Future projections for chilling and heat forcing for European vineyards

Future projections for chilling and heat forcing for European vineyards

Abstract

Aims: The aims of this study were: (1) to compute recent-past thermal conditions over European vineyards, using state-of-the art bioclimatic indices: chilling portions and growing degree hours; (2) to compute future changes of these thermal conditions using a large ensemble of high-resolution climate models.

Methods and Results: To assess grapevine chilling and forcing conditions, chilling portions (CP) and growing degree-hours (GDH) indices were computed for the baseline period (1989–2005) and for the future RCP4.5 and RCP8.5 scenarios (2041–2060), using several regional-global climate model chains. These calculations also considered model uncertainties and biases. These indices were extracted to the current location of vineyards, in Europe and CP-GDH delimitations were assessed. For the baseline period, higher CP values were found in north-central European regions, while lower values tend to occur on opposed sides of Europe (east-west). Regarding forcing, southern European wine regions currently display the highest GDH values. Future projections depict lower CP in southwestern Europe (-45%) and higher CP (+30%) in Eastern Europe. For GDH, most of Europe is projected to have greater values (up to +30%). 

Conclusions: 

These changes may bring limitations to some of the world’s most important wine producers, such as Spain, Italy and Portugal. Nevertheless, a timely planning of appropriate adaptation measures may aid mitigating future yield/quality losses and improve the future sustainability of the winemaking sector. 

Significance and Impact of the Study: Temperature is a fundamental factor affecting plant growth and development rates. Grapevines have thermal thresholds for adequate growth, physiological development and phenology. Given the future projections for Europe, it is evident that grapevine productivity may be particularly vulnerable to climatic change.  As such, it become imperative to study how future temperature conditions will affect vineyards in Europe, namely the chilling and heat forcing conditions.

Download the PDF

DOI:

Publication date: March 17, 2021

Issue: Terroir 2020

Type: Video

Authors

Helder Fraga* and João A. Santos

Centre for the Research and Technology of Agro-Environmental and Biological Sciences, CITAB, Universidade de Trás-os-Montes e Alto Douro, UTAD, 5000-801 Vila Real, Portugal

Contact the author

Keywords

Climate change, chilling, head forcing, viticulture, Europe 

Tags

IVES Conference Series | Terroir 2020

Citation

Related articles…

Vineyard innovative tools based on the integration of earth observation services and in-field sensors (VitiGEOSS project)

Climate change is having an unprecedented impact on the wine industry, which is one of the major agricultural sectors around the world. Global warming, combined with the variation in rainfall patterns and the increase in frequency of extreme weather events, is significantly influencing vine physiology and exposing, more frequently, plants to severe biotic and abiotic stresses. This represents a challenge for viticulturists who need to take complex decisions to adjust vineyard management and achieve oenological goals.

Read More

Identification of the agronomical and landscape potentialities in Côtes du Rhône area (France)

[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"...
Read More

Fertilization with Seaweed (Laminaria japonica) on the characteristics of the bunch and the quality of the grape must of ‘Cabernet Sauvignon’

The objective of the present work was to study the influence of the foliar application of seaweed (Laminaria japonica), on the bunch and on the must in the ‘Cabernet Sauvignon’ grape. The experiment was carried out in the years 2021/2022, in a 21-year-old commercial vineyard, in the municipality of “Dom Pedrito” – “Rio Grande do Sul” (RS). A completely randomized experimental design was used, with 4 treatments and 4 replications (7 plants per replication). The treatments were: T1- control treatment; T2- Exal Powder 5 g L-1; T3- Hidro Exal 15 ml L-1; T4- Exal Powder 5 g L-1+ Hidro Exal 15 ml L-1.

Read More

Novel protocols for variable rate vineyard management

The advent of precision viticulture (PV) has allowed to address problems related to spatial and temporal variability at the within-field scale. Nowadays, several remote and proximal sensing solutions allow description of the existing variability at different temporal and ground resolution through extremely robust soil, vigor, yield, and grape quality maps. In parallel, numerous studies have described grapevine performances within the homogeneous zones and identified soil as main driver of variability. There is a broad consensus that different vigor zones within the same plot may show differential canopy growth, yield and fruit composition, depicting diverse enological potentials and cultural needs.

Read More

INFLUENCE OF THE THICKNESS OF OAK ALTERNATIVES ON THE COMPOSITION AND QUALITY OF RED WINES

Aging red wines in oak barrels is an expensive and laborious process that can only be applied to wines with a certain added value. For this reason, the use of oak alternatives coupled with micro-oxygenation has progressively increased over recent years, because it can reproduce the processes taking place in the barrels more economically and quickly [1]. Several studies have explored how oak alternatives [2-5] can contribute to wine composition and quality but little is known about the influence of their thickness.

Read More