The study of the canopy microscale variability of meteorological variables (radiation, temperature, relative humidity, wind, etc.) is one of the main aims of micrometeorology. In the specific case of vineyards micrometeorological techniques can be useful to describe the behaviour of meteorological variables inside the canopy layer. Some of these methods are based on relatively poor and easily available meteorological data gauged outside the vineyard in order to produce micrometeorological data that are: - directly referred to canopy layer; - directly related to ecophysiology and phytopathology; - useful for decisions about management practices. If we consider the sink organs (grape berries), the knowledge of their thermal behaviour is particular important due to the influence of thermal conditions on the biochemical phenomena involved in ripening. In this context, the aim of this work was the implementation of a micrometeorological model estimating the hourly grape berry temperature on the base of daily values of air temperature (Tmax / Tmin) coming from standard agrometeorological stations. Grape temperature is a crucial driving variable for the wide variety of biochemical processes that are carried out during the ripening of grapes and which determine the quality of wine. A mechanistic modelling approach to the simulation of grape temperature must be founded on the resolution of the energy balance equation referred to the surface of grapes. In this perspective the net radiation triggers three different flows: sensible heat flow, latent heat flow and heat flow into the grapes, which store a part of the total energy exchanged. A model of this kind was developed and parameterised by the authors. The validation activity referred to grape temperatures gauged in two vineyards in 2004 (Valtellina and Piedmont) and in three vineyards in 2005 (Valtellina, Oltrepò pavese and Barolo) is presented and the consequent results are discussed also in terms of grape quality and vineyard management.

A model for grape temperature simulation: validation in a mountain viticultural areas / G. Cola, L. Mariani, O. Failla, D. Eberle - In: Atti primo congresso internazionale sulla viticolttura di montagna e in forte pendenza.[s.l] : CERVIM, 2006. (( Intervento presentato al Primo. convegno Primo congresso internazionale sulla viticolttura di montagna e in forte pendenza tenutosi a Saint Vincent (Aosta) nel 2006.

A model for grape temperature simulation: validation in a mountain viticultural areas.

G. Cola;O. Failla
Penultimo
;
2006

Abstract

The study of the canopy microscale variability of meteorological variables (radiation, temperature, relative humidity, wind, etc.) is one of the main aims of micrometeorology. In the specific case of vineyards micrometeorological techniques can be useful to describe the behaviour of meteorological variables inside the canopy layer. Some of these methods are based on relatively poor and easily available meteorological data gauged outside the vineyard in order to produce micrometeorological data that are: - directly referred to canopy layer; - directly related to ecophysiology and phytopathology; - useful for decisions about management practices. If we consider the sink organs (grape berries), the knowledge of their thermal behaviour is particular important due to the influence of thermal conditions on the biochemical phenomena involved in ripening. In this context, the aim of this work was the implementation of a micrometeorological model estimating the hourly grape berry temperature on the base of daily values of air temperature (Tmax / Tmin) coming from standard agrometeorological stations. Grape temperature is a crucial driving variable for the wide variety of biochemical processes that are carried out during the ripening of grapes and which determine the quality of wine. A mechanistic modelling approach to the simulation of grape temperature must be founded on the resolution of the energy balance equation referred to the surface of grapes. In this perspective the net radiation triggers three different flows: sensible heat flow, latent heat flow and heat flow into the grapes, which store a part of the total energy exchanged. A model of this kind was developed and parameterised by the authors. The validation activity referred to grape temperatures gauged in two vineyards in 2004 (Valtellina and Piedmont) and in three vineyards in 2005 (Valtellina, Oltrepò pavese and Barolo) is presented and the consequent results are discussed also in terms of grape quality and vineyard management.
Vitis vinifera, micro-meteorology
Settore AGR/03 - Arboricoltura Generale e Coltivazioni Arboree
2006
Cervim - Centro ricerche viticoltura di montagna
Book Part (author)
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/26613
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