Lightning is even cooler than you think

Just like an iceberg, the visible part of a lightning strike is just a tiny fraction of the whole.

The visible part of a lightning strike is just a fraction of the total flash. The bolt seen above appears to extend from the cloud directly above the Washington Monument – but it actually begins almost 15km away, in Rockville, Maryland, and is part of a total network spanning 80km and spread over an area of 500km2, according to the Washington Post's Kevin Ambrose:

The flash initiated ~22,000 feet above Landover, Md., before striking ground in the District near Brookland and again near Rock Creek Park. The flash was well over 50 miles long. The upper branches propagated horizontally at ~40,000 feet all the way west to Rockville, Md.

From the lightning data points, Scott created 2D and 3D vector representations of the lightning:

The Post also has more detail of the methodology, as well as a 3D model of the full strike.

The tiny visible part of a 100km-long lighting strike. Photograph: Kevin Ambrose, via Washington Post

Alex Hern is a technology reporter for the Guardian. He was formerly staff writer at the New Statesman. You should follow Alex on Twitter.

ALAMY
Show Hide image

Putting the “savage” back in Sauvignon Blanc

This grape is so easily recognised that it might as well wear a name tag, but many varieties are brasher and bolder than you'd expect.

I was once the life’s companion of a man who was incapable of remembering names. This should have bothered him but he’d grown used to it, while I never could. At gatherings, I would launch myself at strangers, piercing the chatter with monikers to pre-empt his failure to introduce me. I was fairly sure that it was the other person’s name he couldn’t remember but I couldn’t discount the possibility that he had forgotten mine, too.

In wine, the equivalent of my bellowing is Sauvignon Blanc. This grape is so easily recognised that it might as well wear a name tag: it tastes of grass, gooseberry, asparagus and, occasionally, cats’ pee. The popularity of its New Zealand incarnation is probably partly a result of that cosy familiarity – which is ironic, given that “Sauvignon”, harking back to its evolution from wild grapes in France, comes from the French for “savage”. Never mind: evolved it has. “Wine is the most civilised thing we have in this world,” wrote the 16th-century author Rabelais, and he was born in the Touraine, where the gently citrusy Sauvignon makes an excellent aperitif, so he should know.

New World Sauvignons are often brasher and bolshier. It is likely that Rabelais’s two best-known heroes – Gargantua, who is born yelling, “Drink! Drink! Drink!” and whose name means “What a big gullet you have”, and Pantagruel, or “thirsting for everything” – would have preferred them to the Touraines. They work well with spice and aromatics, as Asian-fusion chefs have noticed, while the most elegant Loire Sauvignons, Sancerre or Pouilly-Fumé, make fine matches for grilled white fish or guacamole – in fact, almost anything enhanced by lemon. In Bordeaux, where whites principally blend Sauvignon and Sémillon, the excellent Dourthe is entirely the former; 9,000 miles away in Western Australia, Larry Cherubino makes a rounded Sauvignon in a similar style.

Many variations but one distinctive flavour profile – so I thought I was safe asking my best friend, an unrepentant wine ignoramus, whether she liked Sauvignon. Her shrug spurred an impromptu tasting: Guy Allion’s quaffable Le Haut Perron Thésée 2014, from Rabelais’s Touraine; a Henri Bourgeois Pouilly-Fumé Jeunes Vignes; and Greywacke Wild Sauvignon from Kevin Judd. Judd, who was largely responsible for making New Zealand whites famous when he worked for Cloudy Bay, is now putting the savage back in Sauvignon using naturally occurring (“wild”) yeasts that make the wine rich and slightly smoky but are not, by his own admission, terribly easy to control. This was the most expensive wine (£28, although the Wine Society sells it for £21.50) and my friend loved it.

She had expected to prefer the French wines, on the slightly dubious basis that she is Old World: of Anglo-Danish stock, with a passion for Italy. Yet only familiarity will tell you what you like. This is why bars with long lists of wines by the glass provide the best introduction. A favourite of mine is Compagnie des Vins Surnaturels, a Covent Garden joint run by two women, the sommelier Julia Oudill and the chef Ilaria Zamperlin. If the menu – scallops with Worcestershire sauce, croque-madame with truffled ham and quail egg – is delicious, the wine list is fabulous, with at least ten whites and ten reds at 125ml, with prices ascending into the stratosphere but starting at £6.

There are usually a couple of French Sauvignons, although many bottles still don’t name the grapes and the winemaker Didier Dagueneau (the “wild man of Pouilly”), whose wines feature here, preferred the old Sauvignon name Blanc Fumé. Thank goodness Sauvignon, despite its reputed savagery, has the manners to introduce itself so promptly: one sip, and you can move on to the congenial task of getting to know one another.

Next week: Felicity Cloake on food

Nina Caplan is the 2014 Fortnum & Mason Drink Writer of the Year and 2014 Louis Roederer International Wine Columnist of the Year for her columns on drink in the New Statesman. She tweets as @NinaCaplan.

This article first appeared in the 05 February 2015 issue of the New Statesman, Putin's war