Practical methods of evaluating grape quality and quality potential

Zoecklein, Bruce W.; Gump, Barry H.

doi:10.1016/b978-0-08-102067-8.00003-8

Cited by 3 publications

(2 citation statements)

References 109 publications

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“…Climate regulates not only the geographical distribution but also the quality of vine cultivation. When other terroir factors are held comparatively constant, climate feasibly exerts the strongest effect on the suitability of a region or a site to produce quality grapes and significantly modulates grape berry composition during ripening to confer optimum characteristics to a given wine style (Ashenfelter and Storchmann, 2014;Jones and Davis, 2000;Makra et al, 2009;Zoecklein and Gump, 2022).…”

Section: Introductionmentioning

confidence: 99%

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The interplay between grape ripening and weather anomalies in Northern Italy – A modelling exercise

Meggio

2022

OENO One

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Current climate change is increasing inter- and intra-annual variability in atmospheric conditions leading to grapevine phenological shifts as well as altered grape ripening and composition at ripeness.This study aims to i) detect weather anomalies within a long-term time series, ii) model grape ripening revealing altered traits in time to target specific ripeness thresholds for four Vitis vinifera cultivars, and iii) establish empirical relationships between ripening and weather anomalies with forecasting purposes. The Day of the Year (DOY) to reach specific grape ripeness targets was determined from time series of sugar concentrations, total acidity and pH collected from a private company in the period 2009–2021 in North-Eastern Italy. Non-linear regression models were fitted over a time series of ripening parameters on a calendar time basis and assessed for modelling efficiency (EF) and error of prediction (RMSE) in four grapevine cultivars (Merlot, Cabernet-Sauvignon, Glera and Garganega). For each vintage and cultivar, advances or delays in DOY to target specified ripeness thresholds were assessed with respect to the average ripening dynamics. A thirteen years’ long meteorological series monitored at a ground weather station using hourly air temperature and rainfall data was analysed. Climate statistics were obtained and for each time interval (month, bimester) weather anomalies were identified. A linear regression analysis was performed to assess correlations between ripening and weather anomalies. For each cultivar, ripeness advances or delays expressed in the number of days to target the specific ripening threshold were assessed in relation to registered weather anomalies and the specific reference time interval in the vintage. Precipitation of the warmest month and temperature anomalies during late spring (May–June) and during the warmest month (August) we found to be important to understanding the effect of climate change on sugar ripeness. Maximum and minimum temperatures of the May–June bimester and maximum temperatures of the warmest month best correlate with altered total acidity evolution and pH increment during the ripening process. A new modelling framework is presented using historical data that supports management decisions by better understanding past impacts and forecasting for the future.

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Section: Introductionmentioning

confidence: 99%

“…Vintage to vintage production and quality variations are likely to become much greater throughout the world, impacting typicity and economic outcomes. Both a changing climate and greater seasonal variability will likely influence fruit set and affect maturity, crop uniformity, and maturity evaluation (Zoecklein and Gump, 2022).…”

Section: Introductionmentioning

confidence: 99%

The interplay between grape ripening and weather anomalies in Northern Italy – A modelling exercise

Meggio

2022

OENO One

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Assessing chemical composition variations on vintage, vineyard location and grape ripeness: A regional study of red wines produced in the colorado river middle basin, La Pampa (Argentina)

Varela,

Wagner,

Masseroni

et al. 2024

Journal of Food Composition and Analysis

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Priority measures of adaptation to climate change in the viticulture sector in Serbia

Rankovic-Vasic,

Vukovic-Vimic,

Vujadinovic-Mandic

2024

Zb Mat srp prir nauk

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Viticulture production, like the entire agriculture, is subject to climate changes related to a significant increase in air temperature. High air temperatures during the ripening period negatively affect the yield and quality of grapes. Apart from the increase in air temperature, grape production is also affected by rainfall and the frequency of extreme events. Climate projections for the future predict a further increase in air temperature and a change in the most important viticultural indices. The analysis shows that there has been a change in the climate category according to WI and HI values, and in some areas also CI. The Drought Index (DI) does not show significant changes in the first two periods (2021- 2040; 2041-2060), in contrast to the increased frequency of droughts and the extension of the duration of the dry period during the year. Since the most significant risks in viticulture come from high temperatures during the grape ripening period and from hail and stormy weather during the growing season, appropriate adaptation measures are needed.

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Practical methods of evaluating grape quality and quality potential

Cited by 3 publications

References 109 publications

The interplay between grape ripening and weather anomalies in Northern Italy – A modelling exercise

The interplay between grape ripening and weather anomalies in Northern Italy – A modelling exercise

Assessing chemical composition variations on vintage, vineyard location and grape ripeness: A regional study of red wines produced in the colorado river middle basin, La Pampa (Argentina)

Priority measures of adaptation to climate change in the viticulture sector in Serbia

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