Two days ago, a notification pops up on my phone: “2023 confirmed as world’s hottest year on record.” It’s a headline which is saddening rather than surprising. Anyone who poked their head outside in 2023 probably felt the effect of climate change.
Personally, I feel rather helpless in the face of such a huge battle, but, should you want to get a better understanding of who is valiantly fighting the cause, you should see what Nick Breeze is doing with his series of interviews called ClimateGenn (available to stream on YouTube and through the website.)
As we know, each passing year is becoming more and more volatile, with extreme weather events occuring in places where previously there had been no such issues. An industry like viticulture and winemaking, like all forms of agriculture, is fundamentally intertwined with the weather. After the drought of 2022, we had been hoping for a relatively straightforward 2023, but that wasn’t to be the case. This latest vintage will go down as one of the most complicated in Italy in recent memory.
The technical information in this blog post comes from the annual report provided by agronomic consultants Vitenova and the Institute of Atmospheric Sciences and Climate (IASC), while the anecdotes come from recent conversations with winemakers.
It’s little surprise that 2023 was the warmest year ever recorded in Italy (IASC) because already the winter of 2022-2023 was the fifth hottest since records started in 1800 and was characterised, by and large, by a continuation of the drought of 2022. (Tuscany is the exception here where the winter saw far more rainfall than usual.) The month of March was very warm – the average temperature was up in the top ten hottest averages for March ever recorded – but then we felt the chill in April with temperatures lower than the average, almost -2°C in Friuli and -1.5°C in the Veneto.
May was the month in which the rain fell for most of us, and you may remember the heavy flooding on several occasions in Emilia-Romagna. Maybe it’s because I spend most of my time in the Veneto where they’re known for swearing*, but it was in May when I heard some pretty choice swearwords from winemakers all over the country as they realised they needed to step up the fight against downy (and to a lesser extent powdery) mildew.
You may remember a post from Corrado Dottori of La Distesa in the Marche, who wrote on Facebook at the end of June 2023 that he’d lost 70-80% of his production, and he’d never seen anything like this in his 25 year career as a winemaker.
Domenico Rinaldis of winery Nasciri in Calabria told me: “it was a very complicated year with all the rain that fell in April, May and the first half of June. We had to fight back with sulphur and copper but in the end, we only lost 25% of the production and then, the grapes we harvested were excellent.”
It was a similar story for Marco Merli in Umbria who also lost 25-30% of his production because of the impact of the rain from budburst until flowering.
As an aside, it’s worth noting that despite the abundant rainfall in 2023, there is still a state of severe or extreme drought across 9.3% of Italy (and 10.5% in France.) There’s a hypothesis (again from Drought Central) that the higher temperatures during the summer and autumn meant for higher than expected levels of evaporation, which then caused the intense rainfall in late October and, in turn, the floods and landslides in Tuscany at the beginning of November.
The month of July was possibly the very hottest ever recorded, with temperatures of 47°C in Siciliy and 42°C in Calabria (I confirm, I was there and my gosh, it was hot) and +2,9°C above the average for the Castagneto Carducci weather station near Livorno, Tuscany. In the north, however, while the temperatures were also high, the rain did not let up: with 100 mm above the average in Veneto and Friuli. In the centre of Italy and further south, rainfall was more sporadic; some areas were hit, others not. Marino Colleoni told me over lunch during the Christmas period that over the summer, his vineyards near the panoramic town of Montalcino in Tuscany received the lion’s share of rainfall, whilst in the next valley, it stayed bone dry. But, between the constant rain and two bombardments of hail, his production in 2023 is 80-90% less than usual.
There was hail in the Veneto and Friuli too; on 12-13 July and 24-25 July, large swathes of vineyards stretching from Verona to Friuli passing through Treviso were hit. La Biancara was not spared but the damage was mercifully quite light.
Whilst the summer was the 8th hottest since 1800, the autumn was hot too. Up and down the boot, the months of September and October were dry and +0,93°C e +0,85°C respectively hotter than the average. It was a saving grace. Winemakers who chose to wait it out and harvest later were able to reap the benefits of this clement weather. Marco Merli confirmed: “the grapes that survived the downy mildew were almost perfect. They hadn’t suffered any heat stress and thus the fermentations were strong. The situation in the cellar – in terms of reduction and volatile acidities – is nicely under control.”
I asked them too what they learnt in this complicated year. Domenico at Nasciri said “the main lesson we learnt was of the importance of prevention. We learnt that treating preventatively to protect the grapes was very effective in years like this… and not to give up in the face of bad weather!” Marco Merli is more specific: “I need to improve the availability of tractors and manpower in order to be able to go and spray in the very narrow windows of possibility.”
I also sent a message to Thomas Niedermayr to find out how the year went for his eponymous winery in the Alto Adige, and the answer is rather interesting, so much so that it really merits being expounded upon in its own blog post at a later date.
“For us, it was a fantastic year; good weather, even though it rained, it wasn’t too much. The temperatures were above the average so we started harvest earlier than usual but the grapes were really healthy and there was a generous quantity too. It is further confirmation that resistant varieties are the way forward. We didn’t do a single treatment with copper [i.e. against downy mildew] this year but the grapes were good and healthy. It just shows that us winemakers need to adapt to the conditions in which we find ourselves right now.
* Venice is apparently the city where they swear the most in Italy: 19 times a day, against the national average of 8.91 times a day. It’s said that this prevalence for cursing is due to the frequent logistic headaches involved in living or working in this magical but doomed city. (link)