Has global warming really stopped?

Mark Lynas responds to a controversial article on which argued global warming has s

On 19 December the New Statesman website published an article which, judging by the 633 comments (and counting) received so far, must go down in history as possibly the most controversial ever. Not surprising really – it covered one of the most talked-about issues of our time: climate change. Penned by science writer David Whitehouse, it was guaranteed to get a big response: the article claimed that global warming has ‘stopped’.

As the New Statesman’s environmental correspondent, I have since been deluged with queries asking if this represents a change of heart by the magazine, which has to date published many editorials steadfastly supporting urgent action to reduce carbon emissions. Why bother doing that if global warming has ‘stopped’, and therefore might have little or nothing to do with greenhouse gas emissions, which are clearly rising?

I’ll deal with this editorial question later. First let’s ask whether Whitehouse is wholly or partially correct in his analysis. To quote:

"The fact is that the global temperature of 2007 is statistically the same as 2006 as well as every year since 2001. Global warming has, temporarily or permanently, ceased. Temperatures across the world are not increasing as they should according to the fundamental theory behind global warming – the greenhouse effect. Something else is happening and it is vital that we find out what or else we may spend hundreds of billions of pounds needlessly."

I’ll be blunt. Whitehouse got it wrong – completely wrong. The article is based on a very elementary error: a confusion between year-on-year variability and the long-term average. Although CO2 levels in the atmosphere are increasing each year, no-one ever argued that temperatures would do likewise. Why? Because the planet’s atmosphere is a chaotic system, which expresses a great deal of interannual variability due to the interplay of many complex and interconnected variables. Some years are warmer and cooler than others. 1998, for example, was a very warm year because an El Nino event in the Pacific released a lot of heat from the ocean. 2001, by contrast, was somewhat cooler, though still a long way above the long-term average. 1992 was particularly cool, because of the eruption of a large volcano in the Philippines called Mount Pinatubo.

‘Climate’ is defined by averaging out all this variability over a longer term period. So you won’t, by definition, see climate change from one year to the next - or even necessarily from one decade to the next. But look at the change in the average over the long term, and the trend is undeniable: the planet is getting hotter.

Look at the graph below, showing global temperatures over the last 25 years. These are NASA figures, using a global-mean temperature dataset known as GISSTEMP. (Other datasets are available, for example from the UK Met Office. These fluctuate slightly due to varying assumptions and methodology, but show nearly identical trends.) Now imagine you were setting out to write Whitehouse’s article at some point in the past. You could plausibly have written that global warming had ‘stopped’ between 1983 and 1985, between 1990 and 1995, and, if you take the anomalously warm 1998 as the base year, between 1998 and 2004. Note, however, the general direction of the red line over this quarter-century period. Average it out and the trend is clear: up.

Note also the blue lines, scattered like matchsticks across the graph. These, helpfully added by the scientists at (from where this graph is copied), partly in response to the Whitehouse article, show 8-year trend lines – what the temperature trend is for every 8-year period covered in the graph.

You’ll notice that some of the lines, particularly in the earlier part of the period, point downwards. These are the periods when global warming ‘stopped’ for a whole 8 years (on average), in the flawed Whitehouse definition – although, as astute readers will have quickly spotted, the crucial thing is what year you start with. Start with a relatively warm year, and the average of the succeeding eight might trend downwards. In scientific parlance, this is called ‘cherry picking’, and explains how Whitehouse can assert that "since [1998] the global temperature has been flat" – although he is even wrong on this point of fact, because as the graph above shows, 2005 was warmer.

Note also how none of the 8-year trend lines point downwards in the last decade or so. This illustrates clearly how, far from having ‘stopped’, global warming has actually accelerated in more recent times. Hence the announcement by the World Meteorological Organisation on 13 December, as the Bali climate change meeting was underway, that the decade of 1998-2007 was the “warmest on record”. Whitehouse, and his fellow contrarians, are going to have to do a lot better than this if they want to disprove (or even dispute) the accepted theory of greenhouse warming.

The New Statesman’s position on climate change

Every qualified scientific body in the world, from the American Association for the Advancement of Science to the Royal Society, agrees unequivocally that global warming is both a reality, and caused by man-made greenhouse gas emissions. But this doesn’t make them right, of course. Science, in the best Popperian definition, is only tentatively correct, until someone comes along who can disprove the prevailing theory. This leads to a frequent source of confusion, one which is repeated in the Whitehouse article – that because we don’t know everything, therefore we know nothing, and therefore we should do nothing. Using that logic we would close down every hospital in the land. Yes, every scientific fact is falsifiable – but that doesn’t make it wrong. On the contrary, the fact that it can be challenged (and hasn’t been successfully) is what makes it right.

Bearing all this in mind, what should a magazine like the New Statesman do in its coverage of the climate change issue? Newspapers and magazines have a difficult job of trying, often with limited time and information, to sort out truth from fiction on a daily basis, and communicating this to the public – quite an awesome responsibility when you think about it. Sometimes even a viewpoint which is highly likely to be wrong gets published anyway, because it sparks a lively debate and is therefore interesting. A publication that kept to a monotonous party line on all of the day’s most controversial issues would be very boring indeed.

However, readers of my column will know that I give contrarians, or sceptics, or deniers (call them what you will) short shrift, and as a close follower of the scientific debate on this subject I can state without doubt that there is no dispute whatsoever within the expert community as to the reality or causes of manmade global warming. But even then, just because all the experts agree doesn’t make them right – it just makes them extremely unlikely to be wrong. That in turn means that if someone begs to disagree, they need to have some very strong grounds for doing so – not misreading a basic graph or advancing silly conspiracy theories about IPCC scientists receiving paycheques from the New World Order, as some of Whitehouse’s respondents do.

So, a mistaken article reached a flawed conclusion. Intentionally or not, readers were misled, and the good name of the New Statesman has been used all over the internet by climate contrarians seeking to support their entrenched positions. This is regrettable. Good journalism should never exclude legitimate voices from a debate of public interest, but it also needs to distinguish between carefully-checked fact and distorted misrepresentations in complex and divisive areas like this. The magazine’s editorial policy is unchanged: we want to see aggressive action to reduce carbon emissions, and support global calls for planetary temperatures to be stabilised at under two degrees above pre-industrial levels.

Yes, scientific uncertainties remain in every area of the debate. But consider how high the stakes are here. If the 99% of experts who support the mainstream position are right, then we have to take urgent action to reduce emissions or face some pretty catastrophic consequences. If the 99% are wrong, and the 1% right, we will be making some unnecessary efforts to shift away from fossil fuels, which in any case have lots of other drawbacks and will soon run out. I’d hate to offend anyone here, but that’s what I’d call a no-brainer.

Mark Lynas has is an environmental activist and a climate change specialist. His books on the subject include High Tide: News from a warming world and Six Degree: Our future on a hotter planet.
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An English hero for the ages: Ian Botham at 60

Botham blends his sportsmanship and deep-seated passion for cricket with a lust for life.

Begging W H Auden’s pardon, it is possible both to honour and to value the vertical man, and in the case of Ian Botham, who turned 60 on 24 November, it is our bounden duty. No sportsman has given Britons so much to enjoy in the past half-century and no sportsman is loved more. Two decades after he retired from first-class cricket, his reputation as one of life’s champions remains unassailable.

No mere cricketer is he, either. Botham is a philanthropist, having raised more than £12m for various charities, notably Leukaemia and Lymphoma Research. In December, 30 years after his first walk from John o’Groats to Land’s End, he will set off again, in South Africa, where England are on tour. And he really does walk, too, not amble. As somebody who accompanied him on one of his dozen walks said: “You can’t keep up with him. The man is a phenomenon.”

Of all postwar sportsmen, only Bobby Charlton and, at a pinch, Henry Cooper come close to matching Botham’s enduring popularity. But Charlton, a shy man who was scarred by the Munich plane crash of 1958 (and may never have recovered from its emotional effects), has never comfortably occupied a public stage; and Cooper, being a boxer, had a solitary role. Botham, by contrast, spoke for England. Whenever he picked up his bat, or had a ball in his hand, he left spectators in no doubt.

Others have also spoken for England. Bobby Moore and Martin Johnson, captains respectively of England’s World Cup-winning football and rugby teams, were great players but did not reach out to people as naturally as Botham. Nick Faldo, Lester Piggott, Sebastian Coe and, to bring us up to date, Lewis Hamilton have beaten the best in the world, but they lacked those qualities that Botham displayed so freely. That is not to mark them down. They were, and are, champions. But Botham was born under a different star.

It was John Arlott, the great cricket commentator, who first spotted his uniqueness. Covering a match at Taunton in 1974, he asked the young colt to carry his bags up the rickety staircase to the press box, where Arlott, wearing his oenophile’s hat, pulled out a bottle of red wine and invited Botham to drink. Forty years later Botham is a discriminating wine drinker – and maker. Along with his friend and fellow England great Bob Willis, and their Australian wine­making pal Geoff Merrill, he has put his name to a notable Shiraz, “BMW”.

Arlott, with his nose for talent and good company, saw something in the young Botham that Brian Close, his captain at Somerset, was beginning to bring out. Later, Mike Brearley, as England captain, drew out something even more remarkable. As Rodgers and Hammerstein wrote, you’ve got to be carefully taught. And Botham, a fine team man as well as a supreme individual performer, has never withheld praise from those who enabled him to find his voice.

If sport reveals character, then cricket is the game that reveals it most clearly. In no other sport is the individual performance rooted so firmly in a team context. Every over brings a contest of skill and intelligence between batsman and bowler but only a team can win the match. “A cricketer,” as Arlott said, “is showing you something of himself all the time.”

Cricket also reveals national character more than any other sport. Football may be the most popular game in the world but cricket, and cricketers, tell us far more about England and Englishness. It is instructive, in this regard, to hear what Philippe Auclair, a French journalist and author long resident in London, has to say about Botham: “He is essentially an 18th-century Englishman.” In one! It’s not difficult to sense a kinship with Tom Jones, Fielding’s embodiment of 18th-century life, who began his journey, as readers may recall, in Somerset.

A country boy who played for Worcestershire after leaving Somerset, and who lives by choice in North Yorkshire, Botham is an old-fashioned Englishman. Although nobody has yet found him listening to the parson’s sermon, he is conservative with a small and upper-case C, a robust monarchist, handy with rod and gun, and happiest with a beaker in front of him. He represents (though he would never claim to be a representative) all those people who understand instinctively what England means, not in a narrow way, but through something that is in the blood.

Above all, he will be remembered for ever as the hero of 1981. Even now it takes some believing that Botham bowled and batted with such striking success that the Australians, who were one up after two Tests, were crushed. Some of us who were actually at Headingley for the famous third Test – thousands who claim to have been there were not – recall the odds of 500-1 on an England victory going up on the electronic scoreboard that Saturday evening.

Botham made 149 not out as England, following on, beat the Aussies by 18 runs. For three hours the country seemed to stop. In the next Test, at Edgbaston, Botham took five wickets for one run as Australia fell under his spell. Then, at Old Trafford, on a dank Saturday afternoon, he played the most memorable innings of his life and one of the greatest innings ever played by an Englishman: 118 magnificent, joyful runs. Joy: that’s the word. Botham brought joy into people’s lives.

Yet it was the final Test at the Oval, which ended in a draw, that brought from him a performance no less remarkable than those from before. He bowled 89 overs in that match, flat out, continuing to run in when others withdrew with injury. That was the team man coming to the fore. Little wonder his comrades thought the world of him.

Modest, loyal, respectful to opponents, grateful to all who have lent him a hand, and supported throughout a turbulent life by Kath, his rock of a wife, and their three children, this is a cricketing hero to rank with W G Grace, Jack Hobbs, Wally Hammond and Fred Trueman. A feature in the lives of all who saw him, and a very English hero. 

This article first appeared in the 26 November 2015 issue of the New Statesman, Terror vs the State