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On the development of a regional climate change adaptation plan: Integrating mo...
Gonçalves, Catarina; Honrado, João P.; Cerejeira, João; Sousa, Rita; Vaz, Ana Sofia; Alves, Manuela; Araújo, Miguel; Carvalho-Santos, CláudiaClimate change is expected to have strong social-ecological implications, with global but especially regional and local challenges. To assess the climatic vulnerability of a given territory, it is necessary to evaluate its exposure to climate change and its adaptive capacity. This study describes the development of an Action Plan for Adapting to Climate Change in the Tâmega and Sousa Region, a mountainous inter...
Assessing the grapevine crop water stress indicator over the flowering-veraison...
Chenyao Yang; Menz, Christoph; Fraga, Helder José Chaves; Costafreda-Aumedes, Sergi; Leolini, Luisa; Ramos, Maria Concepción; Molitor, DanielIn Europe, most of vineyards are managed under rainfed conditions, where water deficit has become increasingly an issue. The flowering-veraison phenophase represents an important period for vine response to water stress, which is known to depend on variety characteristics, soil and climate conditions. In this paper, we have carried out a retrospective analysis for important European wine regions over 1986–2015,...
Simultaneous calibration of grapevine phenology and yield with a soil–plant–atm...
Chenyao Yang; Menz, Christoph; Fraga, Helder José Chaves; Reis, Samuel; Machado, Nelson Filipe Lopes; Malheiro, Aureliano C.; Santos, JoãoReliable estimations of parameter values and associated uncertainties are crucial for crop model applications in agro-environmental research. However, estimating many parameters simultaneously for different types of response variables is difficult. This becomes more complicated for grapevines with different phenotypes between varieties and training systems. Our study aims to evaluate how a standard least square...
What Is the Impact of Heatwaves on European Viticulture? A Modelling Assessment
Fraga, Helder José Chaves; Molitor, Daniel; Leolini, Luisa; Santos, JoãoExtreme heat events or heatwaves can be particularly harmful to grapevines, posing a major challenge to winegrowers in Europe. The present study is focused on the application of the crop model STICS to assess the potential impacts of heatwaves over some of the most renowned winemaking regions in Europe. For this purpose, STICS was applied to grapevines, using highresolution weather, soil and terrain datasets fr...
Grapevine phenology in four Portuguese Wine Regions: modeling and predictions
Reis, Samuel; Fraga, Helder José Chaves; Silvestre, José; Eiras-Dias, José Eduardo; Rodrigues, Pedro; Carlos, Cristina da Conceição RibeiroPhenological models applied to grapevines are valuable tools to assist in the decision of cultural practices related to winegrowers and winemakers. The two-parameter sigmoid phenological model was used to estimate the three main phenological stages of the grapevine development, i.e., budburst, flowering, and veraison. This model was calibrated and validated with phenology data for 51 grapevine varieties distrib...
Assessing the impacts of recent-past climatic constraints on potential wheat yi...
Chenyao Yang; Fraga, Helder José Chaves; van Ieperen, Wim; Santos, JoãoWheat yield potentials under rainfed Mediterranean conditions have been long limited by late-in-season occurrence of enhanced water deficits and high temperatures, coinciding with sensitive reproductive stages. Present study aims to quantify and separate the impacts of two main abiotic stresses (drought & heat) on potentially attainable wheat yields, in a typical Mediterranean environment of southern Portugal (...
A review of the potential climate change impacts and adaptation options for eur...
Fraga, Helder José Chaves; Moriondo, Marco; Leolini, Luisa; Dibari, Camilla; Costafreda-Aumedes, Sergi; Kartschall, Thomas; Menz, ChristophViticulture and winemaking are important socioeconomic sectors in many European regions. Climate plays a vital role in the terroir of a given wine region, as it strongly controls canopy microclimate, vine growth, vine physiology, yield, and berry composition, which together determine wine attributes and typicity. New challenges are, however, predicted to arise from climate change, as grapevine cultivation is de...
Phenological Model Intercomparison for estimating grapevine Budbreak date (Viti...
Leolini, Luisa; Costafreda-Aumedes, Sergi; Menz, Christoph; Fraga, Helder José Chaves; Molitor, Daniel; Merante, Paolo; Junk, Jürgen; Kartschall, ThomasBudbreak date in grapevine is strictly dependent on temperature, and the correct simulation of its occurrence is of great interest since it may have major consequences on the final yield and quality. In this study, we evaluated the reliability for budbreak simulation of two modeling approaches, the chilling-forcing (CF), which describes the entire dormancy period (endo- and eco-dormancy) and the forcing approac...
Future Changes in Rice Bioclimatic Growing Conditions in Portugal
Fraga, Helder José Chaves; Guimarães, Nathalie; Santos, JoãoRice is a historically important crop in Portugal. This crop development and production strongly depend on atmospheric conditions in the growing season. Given the strong dependence of climatic conditions, climate change may pose a significant risk for future rice production. In the present study, a high spatial resolution bioclimatic characterization over the main rice producing region in Portugal was performed...
New insights into thermal growing conditions of Portuguese grapevine varieties ...
Costa, Ricardo; Fraga, Helder José Chaves; Santos, JoãoNew decision support tools for Portuguese viticulture are urging under a climate change context. In the present study, heat and chilling accumulation conditions of a collection of 44 grapevine cultivars currently grown in Portugal are assessed at very high spatial resolution (~ 1 km) and for 1981–2015. Two bioclimatic indices that incorporate non-linear plant-temperature relationships are selected for this purp...