OENO IVAS 2019 banner
IVES 9 IVES Conference Series 9 Viticultural zoning of central chile based on bioclimatic indexes and the impact of climate warming

Viticultural zoning of central chile based on bioclimatic indexes and the impact of climate warming

Abstract

Climate is considered one of the main factors that determines the aptitude of a specific location for growing grapes and producing high quality wine, being in that sense one of the main elements defining the concept of terroir. Several bioclimatic indexes have been proposed that attempt to describe the climatic aptitude for high quality wine production. Based on this, a study was developed to characterize present and future viticultural potential of Chilean zones considering the dynamic of climate change.

 
Maps of central Chile were built based in different climatic parameters and the calculation of bioclimatic indexes like Winkler, Huglin, Mean January Temperature, Cold Nights index and Fregoni. Interactive maps obtained allow determining the aptitude of a locality by introducing the geographic coordinates.

 

In a second step, the future evolution of these climatic parameters was studied considering different models of climatic change (CSIRO-Mk3-6-0; GFDL-CM3 and HadCM3), different scenarios (moderate or severe) and different periods of time. Results obtained are also represented in interactive maps allowing seeing the evolution of a climatic parameter in time depending on the model and severity chosen.

 

Results obtained show a clear evolution of the aptitude of the main viticultural areas with with an increase in aptitude of regions in the south of Chile that presently have limitations for a good maturation, in particular of red varieties. More to the south and closer to the Pacific Ocean areas that are not suitable for wine production now become apt for wine production Northern areas are in general negatively affected by becoming too hot and having increasing problems with water supply.

DOI:

Publication date: June 3, 2020

Issue: OENO IVAS 2019

Type: Article

Authors

Edmundo Bordeu, David Mordales and Francisco Meza

Pontificia Universidad Católica de Chile
Vicuña Mackenna 4860 – Comuna de Macul – Santiago – Chile
Postal code: 7820426

Contact the author

Tags

IVES Conference Series | OENO IVAS 2019

Citation

Related articles…

Fermentations management: tools for the preservation of the wine specificity

Development of the indigenous microflora is not insignificant on the wine quality. S. cerevisiae indigenous strains are low tolerant to ethanol.

Read More

Investigating the impact of bottle color, temperature and light exposure on rose wine characteristics

Rosé is leading the fastest growth wine category which hit a 40% increase since 2002. France accounts for over a third (34%) of global consumption followed by the US

Read More

FREE TERPENE RESPONSE OF ‘MOSCATO BIANCO’ VARIETY TO GRAPE COLD STORAGE

Temperature control is crucial in wine production, starting from grape harvest to the bottled wine storage. Climate change and global warming affect the timing of grape ripening, and harvesting is often done during hot summer days, influencing berry integrity, secondary metabolites potential, enzyme and oxidation phenomena, and even fermentation kinetics. To curb this phenomenon, pre-fermentative cold storage can help preserve the grapes and possibly increase the concentration of key secondary metabolites. In this study, the effect of grape pre-fermentative cold storage was assessed on the ‘Moscato bianco’ white grape cultivar, known for its varietal terpenes (65% of free terpenes represented by linalool and its derivatives) and widely used in Piedmont (Italy) to produce Asti DOCG wines.

Read More

From the current probabilistic approach to a deterministic production process, a clear step towards digital transformation in the wine sector

Currently, to consistently ensure the maintenance of a wine-style while benefiting from the utmost rigor made possible by the winemaking process, the composition of the wine blend is made using sensory control. This is performed after the wine is made with no real possibility of deterministic intervention.

Read More

Implications of herbicide, cultivation or cover crop under-vine soil management on the belowground microbiote

Soil management through cover crops in the lines of the vineyards is a common practice in viticulture, since it improves the characteristics of the soil. It has been shown that the cover crops can influence the cycle of nutrients, promote infiltration, decrease erosion, and enhance the soil microbiota biodiversity improving the grapevines. However, the area under the vines tends to be left bare by applying herbicides or tillage to avoid competition with the crop in hot climates. The use of cover crops under the vines might be a plausible alternative to the use of herbicides or cultivation, improving grapevine quality and soil characteristics. The aim of this research was to study the implications of different management of the soil under the vines (herbicide, cultivation or cover crops) on grapevine growth, water and nutritional status and belowground microbial communities.

Read More