Has global warming stopped?

'The global temperature of 2007 is statistically the same as 2006 and every year since"

'The fact is that the global temperature of 2007 is statistically the same as 2006 and every year since 2001'. Plus read Mark Lynas's response

Global warming stopped? Surely not. What heresy is this? Haven’t we been told that the science of global warming is settled beyond doubt and that all that’s left to the so-called sceptics is the odd errant glacier that refuses to melt?

Aren’t we told that if we don’t act now rising temperatures will render most of the surface of the Earth uninhabitable within our lifetimes? But as we digest these apocalyptic comments, read the recent IPCC’s Synthesis report that says climate change could become irreversible. Witness the drama at Bali as news emerges that something is not quite right in the global warming camp.

With only few days remaining in 2007, the indications are the global temperature for this year is the same as that for 2006 – there has been no warming over the 12 months.

But is this just a blip in the ever upward trend you may ask? No.

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.

In principle the greenhouse effect is simple. Gases like carbon dioxide present in the atmosphere absorb outgoing infrared radiation from the earth’s surface causing some heat to be retained.

Consequently an increase in the atmospheric concentration of greenhouse gases from human activities such as burning fossil fuels leads to an enhanced greenhouse effect. Thus the world warms, the climate changes and we are in trouble.

The evidence for this hypothesis is the well established physics of the greenhouse effect itself and the correlation of increasing global carbon dioxide concentration with rising global temperature. Carbon dioxide is clearly increasing in the Earth’s atmosphere. It’s a straight line upward. It is currently about 390 parts per million. Pre-industrial levels were about 285 ppm. Since 1960 when accurate annual measurements became more reliable it has increased steadily from about 315 ppm. If the greenhouse effect is working as we think then the Earth’s temperature will rise as the carbon dioxide levels increase.

But here it starts getting messy and, perhaps, a little inconvenient for some. Looking at the global temperatures as used by the US National Oceanic and Atmospheric Administration, the UK’s Met Office and the IPCC (and indeed Al Gore) it’s apparent that there has been a sharp rise since about 1980.

The period 1980-98 was one of rapid warming – a temperature increase of about 0.5 degrees C (CO2 rose from 340ppm to 370ppm). But since then the global temperature has been flat (whilst the CO2 has relentlessly risen from 370ppm to 380ppm). This means that the global temperature today is about 0.3 deg less than it would have been had the rapid increase continued.

For the past decade the world has not warmed. Global warming has stopped. It’s not a viewpoint or a sceptic’s inaccuracy. It’s an observational fact. Clearly the world of the past 30 years is warmer than the previous decades and there is abundant evidence (in the northern hemisphere at least) that the world is responding to those elevated temperatures. But the evidence shows that global warming as such has ceased.

The explanation for the standstill has been attributed to aerosols in the atmosphere produced as a by-product of greenhouse gas emission and volcanic activity. They would have the effect of reflecting some of the incidental sunlight into space thereby reducing the greenhouse effect. Such an explanation was proposed to account for the global cooling observed between 1940 and 1978.

But things cannot be that simple. The fact that the global temperature has remained unchanged for a decade requires that the quantity of reflecting aerosols dumped put in our atmosphere must be increasing year on year at precisely the exact rate needed to offset the accumulating carbon dioxide that wants to drive the temperature higher. This precise balance seems highly unlikely. Other explanations have been proposed such as the ocean cooling effect of the Interdecadal Pacific Oscillation or the Atlantic Multidecadal Oscillation.

But they are also difficult to adjust so that they exactly compensate for the increasing upward temperature drag of rising CO2. So we are led to the conclusion that either the hypothesis of carbon dioxide induced global warming holds but its effects are being modified in what seems to be an improbable though not impossible way, or, and this really is heresy according to some, the working hypothesis does not stand the test of data.

It was a pity that the delegates at Bali didn’t discuss this or that the recent IPCC Synthesis report did not look in more detail at this recent warming standstill. Had it not occurred, or if the flatlining of temperature had occurred just five years earlier we would have no talk of global warming and perhaps, as happened in the 1970’s, we would fear a new Ice Age! Scientists and politicians talk of future projected temperature increases. But if the world has stopped warming what use these projections then?

Some media commentators say that the science of global warming is now beyond doubt and those who advocate alternative approaches or indeed modifications to the carbon dioxide greenhouse warming effect had lost the scientific argument. Not so.

Certainly the working hypothesis of CO2 induced global warming is a good one that stands on good physical principles but let us not pretend our understanding extends too far or that the working hypothesis is a sufficient explanation for what is going on.

I have heard it said, by scientists, journalists and politicians, that the time for argument is over and that further scientific debate only causes delay in action. But the wish to know exactly what is going on is independent of politics and scientists must never bend their desire for knowledge to any political cause, however noble.

The science is fascinating, the ramifications profound, but we are fools if we think we have a sufficient understanding of such a complicated system as the Earth’s atmosphere’s interaction with sunlight to decide. We know far less than many think we do or would like you to think we do. We must explain why global warming has stopped.

David Whitehosue was BBC Science Correspondent 1988–1998, Science Editor BBC News Online 1998–2006 and the 2004 European Internet Journalist of the Year. He has a doctorate in astrophysics and is the author of The Sun: A Biography (John Wiley, 2005).] His website is

Show Hide image

Why Tehran hates Isis: how religious rifts are fueling conflict

Above all, the Islamic republic wants stability – and to fight back against a group that despises Shia Muslims.

The alliance between Iran and Syria might seem an unlikely one. As Iran is an Islamic republic, one might not expect its closest ally to be a dictatorship that grew out of the political doctrine of Baathism, a secular Arab nationalist movement that originated in the 1930s and 1940s. But politics – and perhaps especially the politics of relations between states – develops its own logic, which often has little to do with ideology. Baathism advocated Arab unity but two of its founding fathers, Michel Aflaq and Zaki al-Arsuzi, both Syrians, disliked each other and would not be members of
the same party.

Projects to fuse Syria and Egypt and, later, Syria and Iraq foundered, creating in the latter case a personal bitterness between Bashar al-Assad’s father, Hafez, and Saddam Hussein, though both were Baathists, at least nominally. That led to the two states breaking off diplomatic relations with each other at the end of 1979. When Iraq invaded Iran the following year, Syria and Iran became allies against Iraq. Syria cut off an oil pipeline that had allowed Iraq to export its oil from a Mediterranean port and Iran supplied Syria with cheap oil.

Iran and Syria had other things in common, including resistance to the US in the region, opposition to Israel and a supportive relationship with the Shia Muslims of Lebanon, which led to the creation, with Iranian help, of Hezbollah after the Israeli invasion of Lebanon in 1982. Since then, Syria has been of value to Iran as a reliable ally but also as a bridge to Hezbollah.

How does all that affect the present desperate situation in Syria and in the Middle East more widely? The first point to deal with is Iran’s position towards Islamic State, or Isis. Some commentators would have you believe that Iran and Isis, as so-called Muslim fundamentalists or Islamists, have something in common, or that Iran’s Islamic Revolution had something to do with the origins of Islamic State.

That is wholly misleading. The extreme Wahhabi/Salafi form of Sunni Islam that underpins Islamic State regards Shia Iranians – and, indeed, all Shia Muslims – as heretics and apostates. This hostility is not somehow theoretical or theologically abstract: it is visceral, bitter and deep. It inspires frequent suicide bombings of Shia mosques and other targets in Iraq, Pakistan, Afghanistan and (more recently) Saudi Arabia. It is a major threat to Iran and to all Shia Muslims – a greater threat to them than the Isis threat to us, because they are geographically closer. The Iranians are supporting the fight against Isis in Syria and Iraq in self-defence and supporting the self-defence of those they are sympathetic to in those countries (the Iranians back the Alawite Assads in Syria because of their long-standing alliance but also for sectarian reasons). They are not acting, as the Saudis and some other Gulf Arabs would have us believe, because they have hegemonic ambitions in the region. That view arises from the insecurity and paranoia of the ruling elites in those states and their dislike of Shia Muslims.

The Iranian regime has many faults. We may deplore the repressive policies of the regime internally, its treatment of women and the unacceptably high level of executions there. But on most of those points, there are others in the region that are worse; and in our thinking about what to do in Syria, Iraq and the region more widely, we have to consider Iran’s record as a force for stability or instability. In both Iraq and Afghanistan, the Iranians helped to establish the proto-democratic governments we backed and, like us, have consistently supported them since, despite their weaknesses and failings. With the exception of its policy towards Israel, Iran has acted to favour stability elsewhere in the region, too. (Recent reports suggest that the Iranians have stopped funding Hamas.) Considering the actions of the Saudis towards Shias in Bahrain and Yemen, the Iranians have responded with restraint.

Iran’s acceptance of greater Russian involvement in Syria has to be seen in the context of the wider instability in the Middle East. Again, we should not misjudge it. It seems that the latest, more intensive Russian intervention came at a point when the Assad regime was coming close to collapse. The Iranians were therefore bound to welcome the intervention; but the history of relations between Iran and Russia is not a happy one and a greater Russian military presence in the Iranians’ near abroad must be making some of them uneasy. When Russian ships launched cruise missiles from the Caspian Sea that tracked across Iranian territory on their way to targets in Syria (announcing at the time that this territory was “unoccupied”), “uneasy” was probably an inadequate word.

After the settlement of the Iranian nuclear question in July (when Iran agreed to limit its nuclear programme in return for the lifting of economic sanctions), hopes for further immediate co-operation between Iran and the West have been disappointed – in particular by the apparent ban of the supreme leader, Ali Khamenei, on bilateral discussions with the US. Nonetheless, there have been discussions, notably in the margins of the recent multilateral talks on Syria.

Just as there was opposition to the nuclear deal within the US, there was strong opposition in Iran. Khamenei’s ban is best understood as reassurance to those hardliners that, apart from the nuclear deal, it will be business as usual.

The nuclear deal is a major event in Iran’s foreign policy but if the Iranians are cautious in developing their relationship with the West, that may be no bad thing. The multi­lateral talks on Syria could be a good place for that to begin – those talks are, in any case, the best hope available for a solution to the carnage in that country. There are models for that in what was done recently in Somalia; one fruitful avenue to explore for the Middle East as a whole could be a multi­lateral negotiation culminating in a treaty guaranteed by outside powers, along the lines of the Westphalia Treaty that brought the Thirty Years War to an end in Germany in the mid-17th century.

Lurking in the background to all this, however, and behind the shocking massacres in Paris on 13 November, is our queasy position towards Isis and the troubles of the Middle East. Some Iranians believe that western countries secretly support Isis. That is wrong, of course – it is a view based on conspiracy theories and misleading propaganda – but not as wrong as we might like to think.

Since 1979, when the Saudi royal family got a scare from religious radicals briefly occupying the sacred precincts in Mecca, it has appeased extreme Wahhabi clergy within Saudi Arabia and has supported the application of their doctrines within and without the country. Outside Saudi Arabia, it has funded mosques preaching Wahhabism throughout the Islamic world, to the point that their brand of Sunni Islam is now becoming dominant in many communities where previously it was quite alien, symbolised by the practice of those British Pakistanis who have begun to adopt dress codes from the Arabian Peninsula, such as the wearing of the niqab.

Al-Qaeda, Isis and their sympathisers are the result of those 30 years of preaching hatred (along with other contributory factors such as the collapse into civil war in countries such as Iraq and Syria and the alienation of young men of immigrant origin in western countries). Isis does no more than put into practice the doctrines of puritanical intolerance advocated by Saudi Wahhabism. Our too-uncritical support for Saudi Arabia puts us in a shameful position.

The debate over whether or not to send RAF warplanes to bomb Isis positions in Syria is secondary to the need for the bombing to be done in close, effective support of ground forces. We may have to swallow our misgivings and accept that we bomb in support of Iran’s troops, or Assad’s, in addition to those of the Kurds or others.

We also urgently need to re-examine our relations with the Saudis and the other Gulf Arab States that have supported and encouraged the spread of extreme Wahhabism. The Saudis have belatedly realised that Isis is as much a threat to them as to everyone else (it may actually be more of a threat to Saudi Arabia because the jihadis’ dearest wish is to establish their caliphate in Mecca and Medina).

Yet that is not enough. We need to make clear that our continued friendship towards the Saudis cannot simply be bought with the weapons we sell them but has to be conditional upon taking a more responsible attitude in their religious policies – not so much for human rights reasons, as Jeremy Corbyn and others have suggested (although those reasons have their place) but for our security and for the stability of the Middle East region.

If that preaching of hatred is not stopped – as the preaching of the Catholic Counter-Reformation eventually came to an end – then even if we, the Iranians, Russians and others succeed in defeating Isis, we will only find ourselves confronted in a few years by yet another generation of murderous jihadis, recruiting from another bunch of foolish, ignorant and disaffected young men, just as Isis followed on from al-Qaeda

Michael Axworthy is senior lecturer at the Institute of Arab and Islamic Studies at the University of Exeter and the author of “Revolutionary Iran”

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