Hot – or too hot?

It’s difficult to believe as I look out of my window in cool and rainy Bristol, that, across much of southern Europe at the moment, there is a heatwave and a drought.  Daytime temperatures there have reached the mid 40s (over 110˚F) for several days in a row, with nights remaining over 30˚ (86˚F) and many places have seen no rain for months.  It may be fine for the tourists (some of them, anyway – I’d find it too hot) but, how about the locals trying to work – or, indeed, the crops?

Vines need both warmth and sunshine to thrive and produce good ripe grapes for wine but, when, as now, conditions get too hot, one of 2 things happen: if there’s plenty of water for irrigation (and local rules allow its use), the combination of great heat and water cause the grapes to swell quickly and rush to ripeness, gaining high levels of sugar (and so high potential alcohol) but not much flavour – that comes from long, slow ripening.  Also, without cooler nights, the acidity that is crucial to making a refreshing wine will drop sharply.  The result: poor quality ‘jug’ wines appealing only to those seeking bargain price quaffing.

When drought conditions accompany a heatwave, as we’re seeing now in southern Europe, or where irrigation is banned, things are very different.  Without water, the vines will begin to shut down in order to protect themselves; the grapes will shrivel and fall off and the harvest will be much reduced.  Producers then need to decide quickly: pick straight away and salvage some of the crop or wait and hope that September will produce cooler temperatures, rain and better prospects.   That is the choice being faced by many now.  When similar extreme conditions occurred in 2003, most chose to pick in August rather than wait.  A few good wines were made, but many were unattractive with baked or dried fruit flavours and some normally long-lasting wines faded quickly. 

But, although 2003 and 2017 are truly exceptional, growers right across Europe are reporting that, even in ‘normal’ years, they are harvesting 2 or 3 weeks earlier than their parents did and picking riper grapes.  And varieties that once only grew in certain places are now thriving in regions that were previously thought too cool. 

Something is certainly happening to the world’s weather.  The climate is changing and all of us, not just the winemakers will need to adjust to it.

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A Frozen Delight

Growing grapes to make wine is not a job for anyone who values certainty.  The weather, vine diseases and pests can all intervene and make the difference between a glorious success and a total loss.  And, with the weather, especially, there’s not much you can do to influence things.

Spring frosts will damage or destroy tiny vine shoots, rain during the flowering period (early summer) will interfere with pollination and cool or wet summers will restrict ripening.  Rain during the autumn harvest can introduce rot or dilute the juice. And, hail at any time can destroy an entire crop in minutes.

But, even if the weather behaves as you would like, a number of vineyard diseases can be a nuisance – albeit most are treatable – and lovely sweet, ripe grapes are a great attraction to birds and often mammals, too.

So, not surprisingly, there are often big celebrations when the harvest is safely gathered in.  For most, that will be by late autumn – unless you’re trying to make Ice Wine (“Eiswein” in Germany and Austria).  For this, you need to leave your grapes on the vine (and untouched by pests) until late November or even December when the temperatures reach -8˚C (18˚F) – cold enough to turn the water content of the grape pulp into ice. Then, pickers go out into the vineyard and rush the grapes back to the winery press before they thaw.  The press releases the sugar in the berries but leaves the water content behind as ice pellets.  In this way, the sugar is greatly concentrated and wonderful, sweet wines result.

Given the process and the risks involved, you won’t be surprised to hear that Ice Wine is quite rare and incredibly expensive (expect to pay £30 – £40 a half bottle retail, rather more in restaurants).  Apart from Germany and Austria, some of the best comes from Canada.  A local Bristol restaurant, Adelina Yard, had an example on their list when we visited with some good friends recently and, of course, we couldn’t resist. 

Stratus’s Ice Wine from Niagara on the Lake in Canada is made from Riesling – probably the best variety for the style giving a wonderful balancing acidity to the surprisingly delicate, but intense sweetness of the wine. 

A real delight and a triumph for the growers.

 

2015: A Good Year?

The year moves into November, the leaves are falling and, across the northern hemisphere, most of the grape harvests are over. So what can we expect from Europe and North America’s 2015 wines? We’re not going to see many of them on our shelves for a while (with the exception of Beaujolais Nouveau, which I’ll be blogging about in a couple of weeks), but a look at the harvest reports gives us a clue. And the news, almost without exception is good.

Let’s start in France. Burgundy and the Rhône enjoyed 2 hot, dry months in June and July and, following a slightly cooler August, were picking healthy, ripe grapes in September. Bordeaux was similar – sunnier and drier than usual – and harvests there began in mid-September with most producers very upbeat about the outcome. In Spain, they’re already talking about the best vintage since 2005 and across in Portugal the crop looks good enough for us to see the first general declaration of a port vintage since the marvellous 2011 as well as some great wines.

Much of Italy suffered from record breaking July temperatures and lower than average rainfall, resulting in lower yields and smaller grapes, so, not a bumper year for volumes but the flip side of this is that producers are saying that there’s a really good concentration of flavours in the grapes suggesting high quality wines.

Over in California, the harvest was also a small one with reports of crops often 20% less than normal. Again, drought and high temperatures were the causes and many growers completed picking by the end of September – remarkably early. Nevertheless, most are fermenting good, fully ripe fruit with the expectation of excellent wines.

Of course, we can’t know how the wines will turn out until we taste them, but with generally favourable weather conditions right across Europe and North America, it looks very hopeful that the wines from 2015 will be well worth waiting for when they start appearing on our shelves in the New Year.