Terroir 2010 banner
IVES 9 IVES Conference Series 9 Grape variety identification and detection of terroir effects from satellite images

Grape variety identification and detection of terroir effects from satellite images

Abstract

Satellite images are used to determine the reflectance dependency to wavelength in different grape varieties (Cabernet-Sauvignon, Merlot, Pinot Noir, and Chardonnay). The terroir influence is investigated through study of vineyards in France, Brazil and Chile. Statistical techniques (ANOVA, cluster and discriminant analysis) are applied. Results indicate that there are consistent spectral features, mainly in the near infrared, which can lead to variety identification. These features are affected by terroir effects, since the reflectance spectra showed similarities between regions, especially for Cabernet Sauvignon; phenological factors further contribute to variety differentiation. An additional search of terroir effects is made on some plots of Sangiovese, located in Tuscany and south Brazil; in this case, differences in spectral features are more important, suggesting that clonal differences may also play a role. It is concluded that remote sensing data are effective to terroir and grape variety studies.

Download the PDF

DOI:

Publication date: October 8, 2020

Issue: Terroir 2010

Type: Article

Authors

G. Cemin (1), J. R. Ducati (2)

(1) Instituto de Saneamento Ambiental. Universidade de Caxias do Sul. Rua Francisco Getúlio Vargas 1130, CEP 95070-560, Caxias do Sul, Brazil
(2) Centro Estadual de Pesquisas em Sensoriamento Remoto e Meteorologia. Universidade Federal do Rio Grande do Sul. Av. Bento Goncalves 9500, CEP 91501-970, Porto Alegre, Brazil

Contact the author

;

Keywords

remote sensing – satellite images – spectral features

Tags

IVES Conference Series | Terroir 2010

Citation

Related articles…

Variability in the content of coarse elements in a viticultural plot in the Graves appellation: relationship with geophysical data

Il a été souvent démontré (Seguin, 1970), que les meilleurs terroirs sont ceux qui présentent pendant la période de maturation du raisin, une régulation et une limitation de l’alimentation hydrique de la vigne. Si on s’intéresse aux facteurs influençant ce régime hydrique, on constate le rôle prépondérant du taux d’éléments grossiers non poreux qui limitent la réserve utile du sol en diminuant le taux de terre fine. De plus, ces éléments grossiers jouent également un rôle au niveau du pédo-climat thermique car leur conductivité thermique et leur chaleur spécifique sont plus élevées que celles de la terre fine. Ainsi le sol se réchauffera et se refroidira plus rapidement (Saini et McLean, 1967), (Gras, 1994).
Read More

Temperature effects on the biosynthesis of aroma compounds in glera grapes

This paper describes the first year results of a study that investigated the effects of altitude and related temperature parameters on the biosynthesis of aromas in the Italian cultivar Glera.

Read More

Advances in the chemistry of rosé winemaking and ageing

The market share of Rosé wine in France has grown from 11 % to 32 % over the last 20 years. Current trends are towards rosé wines of a lighter shade of pink, and where possible, containing a greater concentration in varietal thiols. Grape varieties, the soil on which they are grown, viticultural practices and winemaking technology all impact the polyphenols, color and aromas of rosé wines.

Read More

Response of grapevine cv. “Tinta Roriz” (vitis vinifera L.) to moderate irrigation in the Douro region, Portugal

The behaviour of cv. “Tinta Roriz” (Vitis vinifera L.), was studied when moderate drip irrigation was applied from veraison to harvest. Field studies were conducted during three growing seasons

Read More

EFFECT OF OXIDATION ON LOW MOLECULAR WEIGHT PHENOLIC FRACTION, SALIVARY PROTEINS PRECIPITATION AND ASTRINGENCY SUBQUALITIES OF RED WINES

Changes in the low molecular weight phenolic fraction, obtained by liquid-liquid microextraction technique, were studied after controlled oxidation of two typologies of Sangiovese wines (Brunello di Montalcino and Chianti Classico) belonging to two vintages (2017 and 2018). The fractions were characterized by LC-MS and quantified by HPLC. The most abundant extracted compounds were the phenolic acids. The effect of oxidation, vintage, and wine typology was stated by a three-ways ANOVA. Gallic and syringic acids significantly increased after oxidation while (–)-epicatechin decreased the most.

Read More