Analysis of the daily minimum temperatures variability in the Casablanca Valley, Chile

Abstract

The Casablanca Valley (CV) has a complex topography and is located near the Pacific Ocean. These factors generate important climatic differences in relation to other wine producing zones of Central Chile. The air temperature is one of the most important atmospheric variables in viticulture by its influence on the vine development and the quality of the grapes and wines. In this work, the minimum temperature has been studied using a set of meteorological stations to make a comparative climatology between the CV and surrounding viticultural zones, and also with data from an agrometeorological network inside the CV, to make a local comparison applying the Principal Component Analysis. The synoptic configurations were analyzed for the higher and lower minimum temperatures. The comparison with the surrounding zones shows that the CV has differences in the annual cycle of the minimum temperatures (amplitude and extremes values). Its minimum temperature anomalies are less correlated with the more continental stations, and the differences are statistically more marked and are increasing with growing season. The analysis inside de CV shows low differences, with a 93% of the variance explained by the first principal component, but some oceanic influence exists. The analysis shows that the valley has a well differentiated regime of minimum temperatures compared with other wine-producing zones, noticeable in the warm period. Inside the CV there is a low spatial variability, with an important synoptic control, and it is possible to describe some gradient along the ocean proximity.

DOI:

Publication date: December 3, 2021

Issue: Terroir 2010

Type: Article

Authors

Carlo Montes

Centro de Estudios Avanzados en Zonas Áridas (CEAZA)

Raúl Bitrán S/N, La Serena, Chile

Contact the author

Keywords

Minimum temperature, temperature variability, terroir, viticultural zoning

Tags

IVES Conference Series | Terroir 2010

Citation

Related articles…

The role of NAC61 transcription factor in the regulation of berry ripening progression 

The undergoing global warming scenario is affecting grapevines phenology, including the timing of berry ripening and harvest date, negatively impacting production and quality. This work reports the crucial role of NAC61, a grapevine NAC transcription factor, in regulating metabolic processes occurring from the onset of ripening onwards. NAC61 high confidence targets mainly represent genes acting on stilbene biosynthesis and regulation, and in osmotic and oxidative/biotic stress-related responses. The direct regulation of the stilbene synthase regulator MYB14, the osmotic stress-related gene DHN1b, and the Botrytis cinerea susceptibility gene WRKY52, were all further validated.

The influence of native flora on Argentine white terroir cv. Torrontes Riojano

The main objective of this paper is to establish considerable differences between wines from three wine areas or terroir, made with cv Torrontes Riojano.

Uncovering the interplay between Copper and SO2 tolerance in Saccharomyces cerevisiae

[lwp_divi_breadcrumbs home_text="IVES" use_before_icon="on" before_icon="||divi||400" module_id="publication-ariane" _builder_version="4.20.4" _module_preset="default" module_text_align="center" module_font_size="16px" text_orientation="center"...

Déterminisme de l’effet terroir: influence de la surface foliaire primaire de la vigne en début de cycle sur le potentiel vendange

ln the Mid-Loire Valley, in France, for the fast twenty years a network of experimental plots has been used to analyse the terroir effect on the behaviour of the Cabernet franc variety of grape. The study of the primary leaf area (SFI) for several vintages shows that it differs greatly from one terroir to another.

Phenolic composition of Bordeaux grapes 2009 vintage: comparison with 2006, 2007 and 2008 vintages

‘Cabernet sauvignon’ and ‘Merlot’ are among the most recognized red wine grape cultivars. This work is aimed at investigating the proanthocyanidin composition of skins and seeds to determine the grape variety and the vintage effects on the phenolic composition of Bordeaux grapes.