Jeff forwarded me an interesting article from Le Figaro this week. The subject was research published in the journal Nature, Climate, Change focusing on the effects of climate change on viticulture and the likely need for change.
Some, such as Trump, deny such change of course but those of us in the real world can consider evidence. Vendanges in France now take place on average 2-3 weeks before they used to around 1970. The long history of wine writing means that we know that in Burgundy, for example, harvests are at their earliest in 700 years. Extreme weather in all seasons is more common, made worse by some agricultural practices such as soil impaction from machinery as well as the effects of herbicides which discourage rain from soaking into the soils.
As average temperatures rise seemingly year on year and water shortages occur more frequently in the Languedoc and other regions then viticulteurs face the problem that traditional grape varieties ripen earlier and earlier and struggle in drought conditions such as those shown in the map below indicating ’emergency’ zones in summer 2017.
The researchers, such as Elizabeth Wolkovich from the Harvard University Centre for the Environment, suggest that testing different grape varieties will be necessary. At present many of the world’s leading wine producing countries are dominated by 12 ‘international varieties’ such as Cabernet Sauvignon, Merlot, Chardonnay, Sauvignon Blanc, Syrah, Riesling and Pinot Noir.* The list at the bottom of the page shows how much these vineyards are dominated by the international varieties.
France is more varied with 43.5% planted with these grapes (though 85% under the top 20 grapes). Altogether more than 300 grape varieties are planted around France. Organisations promoting rare and forgotten grapes, eg Wine Mosaic, are gaining traction and the researchers believe that by finding grapes with longer growing seasons and later ripening then regions badly affected by climate change might find ways to preserve their vineyards and traditions.
I have reported many times how Jeff Coutelou has been planting many different cépages. He believes that not only do they provide variety in the vineyard and bottle but that the mix of different grapes in vineyards helps to prevent disease spreading. Castets, Piquepoul Noir, Terret Blanc, Morastel, and even an Inconnue (unknown) are grapes planted int he last few years and he is looking at others such as Picardan which is related to Clairette and Mauzac. Great wines such as Flower Power have resulted from these plantings, more will follow.
This is the way forward, experimenting to find grapes which make good quality wine and which can stand the climatic changes which we face.
* % area of vineyards under the 12 varieties
China – 93 (almost 75% Cabernet Sauvignon)
New Zealand 91.6