Surprise, surprise: Wind turbines do lower carbon emissions

Counter-intuitive thinking is counter-intuitive for a reason.

Climate sceptics have long made the counter-intuitive claim that wind turbines don't actually reduce carbon emissions, but data analysed by the Guardian's environment blog suggests that as well as being counter-intuitive, it's just plain false.

The claim the Guardian's Chris Goodall and Mark Lynas investigated relies on the fact that wind power fluctuates with the weather. As a result, when the windspeed drops, gas power stations have to be spun up to provide electricity instead. It has to be gas, because other low-carbon sources of energy either have the same fluctuations as wind, or, like nuclear power, essentially can't be turned off.

The sceptics argue that the need to rapidly turn on the gas generators means that a type of power station known as a "gas-fired open cycle turbine" (OCGT) has to be used. Their key point is that these turbines, which are capable of being put into use extremely quickly, are less efficient than another type of gas generator, a "combined cycle gas turbine" (CCGT). The need to pick up the slack left by wind power, they say, means that so many of these inefficient turbines are used that carbon emissions actually go up compared to the scenario where all the electricity is generated with the more efficient CCGT type.

The Guardian's blog contains a lot of stats taken straight from the National Grid, all of which confirm the intuitive beliefs: wind power replaces fossil fuels. But for the specific claim that it still results in higher carbon emissions, the operative paragraph is the following:

Their arguments are not borne out by current statistics, however. If the sceptics were right, the recent windy conditions would have seen considerable use of less-efficient OCGT as wind input to the grid ramped up and down. In actual fact, during the entire June-September period, OCGTs and equally dirty oil-fired stations produced less than one hundredth of one percent of all UK electricity. In total they operated for a grand total of just nine half hour periods in the first 19 days of the month – and these periods had nothing to do with changing windspeeds.

In other words, the mechanism the sceptics suggested might be at work isn't. The authors go into greater detail about why that is, as well. In essence, it comes down to the fact that wind power isn't actually all that unpredictable. It comes and goes, but we usually have a good few hours warning about when it's going to die down; and it's spread throughout the country, allowing even more flattening of the peaks and troughs in supply.

The bigger reason for having to suddenly spin up big generators isn't sudden drops in supply, but sudden peaks in demand. Take, for example, a World Cup match, where England have made it through to sudden death penalties. The National Grid know there will be a spike in power consumption the minute the match ends, as people get up to put the kettle on – but they can't know when that spike will be until mere seconds before it actually happens. That sort of load will always be problematic to supply with renewables – but it's not much less problematic to supply with fossil fuel either.

Wind turbines. Photograph: Getty Images

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

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Four times Owen Smith has made sexist comments

The Labour MP for Pontypridd and Jeremy Corbyn’s Labour leadership rival has been accused of misogynist remarks. Again.

2016

Wanting to “smash” Theresa May “back on her heels”

During a speech at a campaign event, Owen Smith blithely deployed some aggressive imagery about attacking the new Prime Minister. In doing so, he included the tired sexist trope beloved of the right wing press about Theresa May’s shoes – her “kitten heels” have long been a fascination of certain tabloids:

“I’ll be honest with you, it pained me that we didn’t have the strength and the power and the vitality to smash her back on her heels and argue that these our values, these are our people, this is our language that they are seeking to steal.”

When called out on his comments by Sky’s Sophy Ridge, Smith doubled down:

“They love a bit of rhetoric, don’t they? We need a bit more robust rhetoric in our politics, I’m very much in favour of that. You’ll be getting that from me, and I absolutely stand by those comments. It’s rhetoric, of course. I don’t literally want to smash Theresa May back, just to be clear. I’m not advocating violence in any way, shape or form.”

Your mole dug around to see whether this is a common phrase, but all it could find was “set back on one’s heels”, which simply means to be shocked by something. Nothing to do with “smashing”, and anyway, Smith, or somebody on his team, should be aware that invoking May’s “heels” is lazy sexism at best, and calling on your party to “smash” a woman (particularly when you’ve been in trouble for comments about violence against women before – see below) is more than casual misogyny.

Arguing that misogyny in Labour didn’t exist before Jeremy Corbyn

Smith recently told BBC News that the party’s nastier side only appeared nine months ago:

“I think Jeremy should take a little more responsibility for what’s going on in the Labour party. After all, we didn’t have this sort of abuse and intolerance, misogyny, antisemitism in the Labour party before Jeremy Corbyn became the leader.”

Luckily for Smith, he had never experienced misogyny in his party until the moment it became politically useful to him… Or perhaps, not being the prime target, he simply wasn’t paying enough attention before then?

2015

Telling Leanne Wood she was only invited on TV because of her “gender”

Before a general election TV debate for ITV Wales last year, Smith was caught on camera telling the Plaid Cymru leader that she only appeared on Question Time because she is a woman:

Wood: “Have you ever done Question Time, Owen?”

Smith: “Nope, they keep putting you on instead.”

Wood: “I think with party balance there’d be other people they’d be putting on instead of you, wouldn’t they, rather than me?”

Smith: “I think it helps. I think your gender helps as well.”

Wood: “Yeah.”

2010

Comparing the Lib Dems’ experience of coalition to domestic violence

In a tasteless analogy, Smith wrote this for WalesHome in the first year of the Tory/Lib Dem coalition:

“The Lib Dem dowry of a maybe-referendum on AV [the alternative vote system] will seem neither adequate reward nor sufficient defence when the Tories confess their taste for domestic violence on our schools, hospitals and welfare provision.

“Surely, the Liberals will file for divorce as soon as the bruises start to show through the make-up?”

But never fear! He did eventually issue a non-apology for his offensive comments, with the classic use of “if”:

“I apologise if anyone has been offended by the metaphorical reference in this article, which I will now be editing. The reference was in a phrase describing today's Tory and Liberal cuts to domestic spending on schools and welfare as metaphorical ‘domestic violence’.”

***

A one-off sexist gaffe is bad enough in a wannabe future Labour leader. But your mole sniffs a worrying pattern in this list that suggests Smith doesn’t have a huge amount of respect for women, when it comes to political rhetoric at least. And it won’t do him any electoral favours either – it makes his condemnation of Corbynite nastiness ring rather hollow.

I'm a mole, innit.