Terroir 2008 banner
IVES 9 IVES Conference Series 9 On the stability of spectral features of four vine varieties in Brazil, Chile and France

On the stability of spectral features of four vine varieties in Brazil, Chile and France


Satellite images of vineyards in France, Chile, and Brazil are used to study spectral differences between the vine varieties Cabernet Sauvignon, Merlot, Pinot Noir, and Chardonnay, to verify if features of a given variety are conserved at vineyards in completely different terroirs. Data are eight images from ASTER (Advanced Spaceborne Thermal Emission and Reflection Radiometer) orbital sensor, for years 2000, 2001, 2002, 2004, and 2006. Additional information is from maps of properties, field surveys and GPS measurements. In France, data is from the Champagne region (Pinot Noir and Chardonnay), and Bordeaux (Cabernet Sauvignon and Merlot); images of Chile are of Aconcagua Valley (Cabernet Sauvignon, Merlot); in Brazil, data for all varieties are from the Serra do Sudeste region. All spectra are expressed in reflectance values, across the nine spectral bands of VNIR (Visible and Near Infrared) and SWIR (Shot Wave Infrared), which are ASTER detection subsystems. Corrections for atmospheric absorption are applied. It is assumed that vine leaves are the dominant source of radiance. Spectra and NDVI for each variety, for every terroir, are generated. Results are: a) spectra of Cabernet Sauvignon and Merlot are similar to each other, over all regions; b) Pinot Noir and Chardonnay also have similar, characteristic spectra; c) spectra from later stages in the phenological cycle tend to have smaller reflectances; d) for each variety, the characteristic spectra has a stable configuration, even when measured in different terroirs and at different epochs; e) NDVI values confirm the two-by-two grouping of varieties. It is concluded that, despite large differences in terroir, spectral features of each one of the studied varieties are conserved.


Publication date: December 8, 2021

Issue: Terroir 2008

Type : Article


Gisele CEMIN, Jorge Ricardo DUCATI

Centro Estadual de Pesquisas em Sensoriamento Remoto e Meteorologia
Universidade Federal do Rio Grande do Sul
Av. Bento Gonçalves 9500 – CEP 91501-970
Porto Alegre, Brazil

Contact the author


remote sensing, spectral signatures, satellite images, terroirs


IVES Conference Series | Terroir 2008


Related articles…

Physiological and growth reaction of Shiraz/101-14 Mgt to row orientation and soil water status

Advanced knowledge on grapevine row orientation is required to improve establishment, management and outcomes of vineyards on terroirs with different environmental conditions (climate, soil, topography) and in view of a future change to more extreme climatic conditions. The purpose of this study was to determine the combined effect of row orientation, plant water status and ripeness level on the physiological and viticultural reaction of Shiraz/101-14 Mgt.

Effects of mechanical leafing and deficit irrigation on Cabernet Sauvignon grown in warm climate of California

San Joaquin Valley accounts for 40% of wine grape acreage and produces 70% of wine grape in California. Fruit quality is one of most important factors which impact the economical sustainability of farming wine grapes in this region. Due to the recent drought and expected labor cost increase, the wine industry is thrilled to understand how to improve fruit quality while maintaining the yield with less water and labor input. The present study aims to study the interactive effects of mechanical leafing and deficit irrigation on yield and berry compositions of Cabernet Sauvignon grown in warm climate of California.

The effects of cane girdling on berry texture properties and the concentration of some aroma compounds in three table grape cultivars

The marketability of the table grapes is highly influenced by the consumer demand; therefore the market value of the table grapes is mainly characterized by its berry size, colour, taste and texture. Girdling could cause accumulation of several components in plants above the ringing of the phloem including clusters and resulting improved maturity. The aim of the experiments was to examine the effect of girdling on berry texture characteristics and aroma concentration.

Application of a fluorescence-based method to evaluate the ripening process and quality of Pinot Blanc grape

The chemical composition of grape berries at harvest is one of the most important factors that should be considered to produce high quality wines. Among the different chemical classes which characterize the grape juice, the polyphenolic compound, such as flavonoids, contribute to the final taste and color of wines. Recently, an innovative non-destructive method, based on chlorophyll fluorescence, was developed to estimate the phenolic maturity of red grape varieties through the evaluation of anthocyanins accumulated in the berry skin. To date, only few data are available about the application of this method on white grape varieties.

Different yield regulation strategies in semi-minimal-pruned hedge (SMPH) and impact on bunch architecture

Yields in the novel viticulture training system Semi-Minimal-Pruned Hedge (SMPH) are generally higher compared to the traditional Vertical Shoot Positioning (VSP). Excessive yields have a negative impact on the vine and wine quality, which can result in substantial losses in yield in subsequent vintages (alternate bearing) or penalties in fruit quality. Therefore yield regulation is essential. The bunch architecture in SMPH differs from VSP. Generally there is a higher amount but smaller bunches with lower single berry weights in SMPH compared to VSP.