Modelling Chablis vintage quality in response to inter-annual variation in weather

The weather during grape production affects wine quality. Changes in the weather in the Chablis region of France and in the quality of Chablis wines (vintage scores) from 1963 to 2018 were analysed. Chablis wine quality improved over this period, with no poor vintages after 1991. Summer temperature and sunshine duration both increased progressively between 1963 to 2018 with fewer frost days but no linear change detected in precipitation. Chablis vintage score was modelled as a function of mean temperature from April to September (curvilinear relation, maximum score at 16–17 °C), mean minimum temperature in September (an index of cool nights; negative relation), and total rainfall from June to September (negative relation). This simple three-factor model distinguished between poor and higher-quality Chablis vintages well, but less so between good and excellent vintages. Application of the model to different climate change scenarios (assuming current viticultural and oenological practices) suggests that vintage scores will decline (slightly to substantially, dependent upon emissions scenario) by the 2041 to 2070 period. This reduction in quality would, however, be minimised if the warming of cool nights is less than currently forecast. The Chablis vintage score model may help identify sites with suitable climates for premium white wine from Chardonnay grapevines in emerging cool climate viticulture regions as well as aiding Chablis producers mitigate the effects of climate change.

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Phenology of Tempranillo and Cabernet-Sauvignon varieties cultivated in the Ribera del Duero DO: observed variability and predictions under climate change scenarios

OENO One ◽

10.20870/oeno-one.2018.52.1.2119 ◽

2018 ◽

Vol 52 (1) ◽

Cited By ~ 10

Author(s):

Maria Concepción Ramos ◽

Gregory V Jones ◽

Jesús Yuste

Keyword(s):

Climate Change ◽

Emission Scenario ◽

Coupled Model ◽

Late Winter ◽

Cabernet Sauvignon ◽

Climate Change Scenarios ◽

Wine Quality ◽

Rcp Scenarios ◽

The Future ◽

The Impact

Aim: This research examined relationships between grapevine phenology and climate in the Ribera del Duero DO (Spain). The observed varieties included Tempranillo, the main variety planted in the region, and Cabernet-Sauvignon.Methods and Results: Phenological events for stages C (budbreak), I (bloom), M (véraison) and N (maturity) were analyzed for 2004-2015. Dormant period chilling and late winter heating requirements to initiate growth were evaluated and accumulated temperature (growing degree days-GDD) prior to each phenological event and in between events were examined for the role they play in influencing growth timing. The results were then used to examine future phenological changes due to climate change using eight models integrated in the Coupled Model Intercomparison Project (CMIP5) and for two Representative Concentration Pathways (RCP) scenarios – RCP4.5 and RCP8.5 – for 2030, 2050, and 2070. Accumulated temperatures after March 20th become important for initiating phenology and are strongly correlated to all growth events. The influence of water availability between budbreak and bloom and between bloom and véraison on phenological timing was also confirmed.Conclusions: The projections showed that for the RCP4.5 emission scenario, budbreak is predicted earlier by approximately 2 days for 2030, 3 days for 2050 and 5 days for 2070, while bloom is predicted to be 3 to 8 days earlier and véraison 6 to 19 days earlier for the same time periods. For the RCP8.5 emission scenario, budbreak is modeled to take place about 3 days, 5 days and 9 days earlier, respectively for 2030, 2050 and 2070. Bloom is predicted to occur about 5, 10 and 16 days earlier; véraison is predicted earlier by 10 days for 2030, 19 days for 2050, and 28 days for 2070. Maturity and the timing of harvest could be up to 23 days earlier under the RCP4.5 emission scenario and up to 35 days earlier under the RCP8.5 emission scenario. Compared to Cabernet-Sauvignon, Tempranillo exhibited greater phenological sensitivity to temperature changes in the observed time period that is likely to continue into the future with greater changes to earlier growth events projected. This sensitivity could be problematic for the region due to the variety’s historic importance and points to the need to examine adaptive measures that can help growers to respond to projected changes in climate.Significance and impact of the study: The projected climate changes in the future indicate the potential for significant changes in the phenology of Tempranillo in the Ribera del Duero DO, Spain. Given that this variety has the largest contribution and importance in this region, these changes could have impacts on wine quality, indicating the need of establishing strategies to reduce or mitigate the impact from future changes in climate.

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What is the expected impact of climate change on wine aroma compounds and their precursors in grape?

OENO One ◽

10.20870/oeno-one.2017.51.2.1868 ◽

2017 ◽

Vol 51 (2) ◽

pp. 141-146 ◽

Cited By ~ 17

Author(s):

Alexandre Pons ◽

Lucile Allamy ◽

Armin Schüttler ◽

Doris Rauhut ◽

Cécile Thibon ◽

...

Keyword(s):

Climate Change ◽

Wine Aroma ◽

Wine Quality ◽

Wine Production ◽

Green Pepper ◽

Intrinsic Quality ◽

Change Context ◽

Growing Conditions ◽

Wine Aging

The intrinsic quality of a wine is strongly linked with its volatile compound composition involved in the complexity of wine’s subtle flavor nuances. Those reminiscent of green pepper, herbaceous, blackcurrant, blackberry, figs or prunes are strongly linked with the maturity of the grapes. Nowadays it is well accepted that macroscopic effects of climate change modify the environmental conditions of grape growing at local scale in all the vineyards across the world. The expected effects on grape and wine production can be positive when they increase the maturity of the grapes, but when the conditions are too warm and too dry they induce opposite effects producing grapes and wines with a lower intrinsic quality. These effects were perceived in young wines but also in older wines kept several years in bottle.In this article, we provide some examples of effects of climate change and growing conditions on grapevine and wine quality expressed as flavors and antioxidant composition. We also report some results associated with the incidence of grape growing conditions on white and red wine aging potential and on the composition of old wines.Finally, we discuss the opportunities for vine growers and winemakers to manage the quality of their grapes and wines in this climate change context.

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Impact of Elevating Temperature Based on Climate Change Scenarios on Growth and Fruit Quality of Red Pepper (Capsicum annuum L.)

Korean Journal of Agricultural and Forest Meteorology ◽

10.5532/kjafm.2015.17.3.248 ◽

2015 ◽

Vol 17 (3) ◽

pp. 248-253 ◽

Cited By ~ 4

Author(s):

Eun Young Song ◽

Kyung Hwan Moon ◽

In Chang Son ◽

Seung Hwan Wi ◽

Chun Hwan Kim ◽

...

Keyword(s):

Climate Change ◽

Capsicum Annuum ◽

Fruit Quality ◽

Red Pepper ◽

Climate Change Scenarios ◽

Capsicum Annuum L

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Influence of curettage on Esca-diseased Vitis vinifera L. cv. Sauvignon blanc plants on the quality of musts and wines

OENO One ◽

10.20870/oeno-one.2021.55.1.4479 ◽

2021 ◽

Vol 55 (1) ◽

pp. 171-182

Author(s):

Émilie Bruez ◽

Céline Cholet ◽

Cécile Thibon ◽

Pascaline Redon ◽

Soizic Lacampagne ◽

...

Keyword(s):

Alcoholic Fermentation ◽

White Wine ◽

Chemical Analyses ◽

Wine Quality ◽

Sauvignon Blanc ◽

Foliar Symptoms ◽

Sensory Analyses ◽

One Year ◽

The One

Aim: A study on Sauvignon blanc (SB) cultivar in France showed that curettage had an effect on the resilience of GTD grapevines. No experiments, however, have been conducted on its effects on wine quality, particularly on white Sauvignon blanc cultivar wines.Methods and results: Grapevines from Sauvignon blanc cultivar that had expressed Esca-foliar symptoms were used for the study, with some of them having been curetted in 2014. Subsequently, bunches from Control (asymptomatic), Curetted and Esca-symptomatic vines were harvested in 2017 and 2018 in order to produce white wine. Technical and chemical results on both must and wine showed that wines from curetted plants were similar to those from asymptomatic vines. There were differences, however, for Esca-diseased vines, where the alcoholic fermentation of musts was faster than for the other modalities. Olfactometry results showed that, for the one-year-old 2017 vintage wines, no differences were detected, although they were for the 2018 vintage.Conclusion: The results of the chemical analyses and wine tasting showed that the wines from curetted and asymptomatic grapevines were similar, and that their quality was the same.Significance of the study: The quality of wines from curetted vines compared to asymptomatic ones was confirmed and validated through chemical and sensory analyses of the must and the one-year-old wines.

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What is the expected impact of climate change on wine aroma compounds and their precursors in grape?

OENO One ◽

10.20870/oeno-one.2016.0.0.1868 ◽

2017 ◽

Vol 51 (2) ◽

pp. 141

Author(s):

Alexandre Pons ◽

Lucile Allamy ◽

Armin Schüttler ◽

Doris Rauhut ◽

Cécile Thibon ◽

...

Keyword(s):

Climate Change ◽

Wine Aroma ◽

Wine Quality ◽

Wine Production ◽

Green Pepper ◽

Intrinsic Quality ◽

Change Context ◽

Growing Conditions ◽

Wine Aging

The intrinsic quality of a wine is strongly linked with its volatile compound composition involved in the complexity of wine’s subtle flavor nuances. Those reminiscent of green pepper, herbaceous, blackcurrant, blackberry, figs or prunes are strongly linked with the maturity of the grapes. Nowadays it is well accepted that macroscopic effects of climate change modify the environmental conditions of grape growing at local scale in all the vineyards across the world. The expected effects on grape and wine production can be positive when they increase the maturity of the grapes, but when the conditions are too warm and too dry they induce opposite effects producing grapes and wines with a lower intrinsic quality. These effects were perceived in young wines but also in older wines kept several years in bottle.In this article, we provide some examples of effects of climate change and growing conditions on grapevine and wine quality expressed as flavors and antioxidant composition. We also report some results associated with the incidence of grape growing conditions on white and red wine aging potential and on the composition of old wines.Finally, we discuss the opportunities for vine growers and winemakers to manage the quality of their grapes and wines in this climate change context.

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Climate and the Myracrodruon urundeuva Allemão seed production

Revista Brasileira de Geografia Física ◽

10.26848/rbgf.v13.07.p3689-3697 ◽

2020 ◽

Vol 13 (07) ◽

pp. 3689

Author(s):

Gilmara Moreira de Oliveira ◽

FRANCISLENE Angelotti ◽

Emanuel José Nascimento Marques ◽

Fabrício Francisco Santos da Silva ◽

Claudineia Regina Pelacani ◽

...

Keyword(s):

Climate Change ◽

Seed Production ◽

Calibration Model ◽

Climate Change Scenarios ◽

Selection Of Variables ◽

Significant Difference ◽

Physiological Quality ◽

Para Determinar ◽

Phenological Phases

The seed physiological quality is related with climate variation during development. Thus, the aim of this study was to determinate the relation among climatic factors and germination of M. urundeuva seeds in different growing seasons and to predict the germination according to the climatic scenarios. Seeds from 14 crop seasons (2005 to 2018) and climatic data from the ‘Bebedouro’ weather station (Embrapa Semiarid) were used to determine the influence of climatic conditions on the vegetative, female and male flowers and the fruiting of M. urundeuva. The simple linear correlation and the multiple linear regression model were applied to determine the influence of climatic elements on the production of M. urundeuva seeds. The multivariate calibration model was developed using the previous selection of variables by the algorithm of successive projections. From the mathematical model, the germination of M. urundeuva seeds was predicted according to climate change, as provided by the IPCC. Seed germination showed a significant difference between harvests. Through the correlation it was observed that the temperature correlated negatively with all phenological phases of M. urundeuva. The quality of M. urundeuva seeds is related to the maximum, average and minimum temperature, average and minimum humidity, and precipitation. These climate variables during the different phenological phases of M. urundeuva affect the physiological quality of the seeds, and, in climate change scenarios, there will be a reduction in the seed production of this species. O clima e a produção de sementes de Myracrodruon urundeuva Allemão RESUMO A qualidade fisiológica das sementes está relacionada às variações climáticas durante o seu desenvolvimento. Assim, o objetivo deste trabalho foi determinar a relação entre os elementos climáticos e a germinação de diferentes safras de sementes de M. urundeuva, bem como prever a germinação frente aos cenários climáticos. Foram utilizadas sementes de 14 safras (2005 a 2018) e os dados climáticos da estação meteorológica de Bebedouro, pertencente a Embrapa Semiárido, para determinar a influência das condições climáticas nas fases vegetativa, flores femininas e masculinas e da frutificação de M. urundeuva. A correlação linear simples e o modelo de regressão linear múltipla foram aplicados para determinar a influência dos elementos climáticos na produção de sementes de M. urundeuva. O modelo de calibração multivariado foi desenvolvido empregando a seleção prévia de variáveis pelo algoritmo das projeções sucessivas. A partir do modelo matemático realizou-se a previsão da germinação de sementes de M. urundeuva frente às mudanças climáticas, previstas pelo IPCC. A germinação das sementes apresentou diferença significativa entre as safras. Por meio da correlação observou-se que a temperatura correlacionou negativamente com todas as fases fenológicas da M. urundeuva. A qualidade das sementes de M. urundeuva está relacionada com a temperatura máxima, média e mínima, umidade média e mínima, e com a precipitação. Essas variáveis de clima durante as diferentes fases fenológicas de M. urundeuva afetam a qualidade fisiológica das sementes, sendo que, em cenários de mudanças climáticas, ocorrerá uma redução na produção de sementes desta espécie.Palavras-chave: aroeira-do-sertão, mudanças climáticas, germinação.

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A Psychometric Study of the Quality Perception Questionnaire

Swiss Journal of Psychology ◽

10.1024/1421-0185/a000076 ◽

2012 ◽

Vol 71 (2) ◽

pp. 101-106 ◽

Cited By ~ 4

Author(s):

Raffaele Cioffi† ◽

Anna Coluccia ◽

Fabio Ferretti ◽

Francesca Lorini ◽

Aristide Saggino ◽

...

Keyword(s):

Structural Equation ◽

Factor Model ◽

Equation Modeling ◽

Fit Indices ◽

Quality Perception ◽

Italian Survey ◽

Confirmatory Factor ◽

Instrument Measuring ◽

Hospital Structures

The present paper reexamines the psychometric properties of the Quality Perception Questionnaire (QPQ), an Italian survey instrument measuring patients’ perceptions of the quality of a recent hospital admission experience, in a sample of 4400 patients (Mage = 56.42 years; SD = 19.71 years, 48.8% females). The 14-item survey measures four factors: satisfaction with medical doctors, nursing staff, auxiliary staff, and hospital structures. First, we tested two models using a confirmatory factor analysis (structural equation modeling): a four orthogonal factor and a four oblique factor model. The SEM fit indices and the χ² difference suggested the acceptance of the second model. We then did a simulation using a bootstrap with 1000 replications. Results confirmed the four oblique factor solution. Third, we tested whether there were significant differences with respect to age or sex. The multivariate general linear model showed no significant differences in the factors with respect to sex or age.

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