Figure 3 - uploaded by Chris Foss
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topographical map of Rock Lodge Vineyard, displaying orientation and positioning of ADVICLIM project temperature sensors.
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... Although considered high resolution in climate modelling terms, in the context of smallscale vineyards that typify the viticulture scape of the UK, the largest being 90 ha (0.9 km 2 ), climate estimates at the 12 km scale are essentially mesoscale in nature. Tis is because the topographic diversity of the Southeast England viticulture region is likely to create microclimate variations at the intravineyard scale [21], as found for vineyards in a wide range of other geographical settings [22][23][24]. Such subgrid scale variability is not captured by "high resolution" climate projections. ...
Background and Aims. The cultivation of grapevines in England is expected to benefit under climate change. Yet assessments of future wine climates remain undeveloped. Accordingly, this study assesses how climate change might modify frost risk for Chardonnay in the Southeast England viticulture region. Methods and Results. Cold-bias-corrected climate projections from the UKCP18 Regional (12 km) perturbed parameter ensemble (PPE) climate model under RCP8.5 are applied with phenological models to determine how frost risk and the timing of key grapevine phenophases might alter under climate change. Notwithstanding the uncertainties associated with projections of key viticulture-related bioclimate variables, the last spring frost was found to advance at a greater rate than budburst, indicating a general decrease in frost risk. Conclusions. Although projections point to an improving climate for viticulture across Southeast England, frost will remain a risk for viticulture, albeit at a reduced level compared to the present. Furthermore, the strong cold-bias found for temperature simulations used in this study needs to be given careful consideration when using the UKCP18 projections for viticulture impact assessments of climate change. Significance of the Study. This study highlights the present sensitivity of viticulture to climate variability and the inherent uncertainty associated with making future projections of wine climate under climate change.
