The debate on global warming has been going on for over 25 years now. It is without doubt a hotbed topic for both environmentally conscious and business interests that (currently) freely emit carbon . The rhetoric being thrown back and forth has gone from discussion to polarizing debate to plain myth – from both sides. A look at the discussion based on some recent facts and studies is in order as well as a way to get past the rhetoric.
Fact – Global Warming has at the least slowed in the last decade
Despite the dire predictions of 25 years ago there are still polar ice caps in 2013. Every legitimate study known concludes that pace of global warming has decreased in the last decade at a minimum. Climate Monitoring and Attribution is widely considered the authority on such data and even they agree, however believe it to be “a temporary hiatus” as opposed to trend.
Global warming naysayers claim this is evidence that it is all “junk science” as virtually all of the models predicted acceleration of global warming. There is no doubt that the greenhouse gasses thought to be the cause of global warming have increased and the atmospheric warming rate has decreased. It is still far too early to claim the science was all wrong however.
(Editor’s note: as one commenter noted below, the notion of “global warming slowing down” is considerably more complex – for much more detailed explanations, see the Yale Forum on Climate Change & the Media, and Climate Central).
Fiction – We are in a period of Global Cooling
The extremist on the other side point to certain studies and are using it to claim not only are we not in state of warming, but it has actually reversed into global cooling. This claim is made based on using a starting point of the warmest year in recorded temperature (1998) and claiming it is cooler now than then. It is not difficult to see that starting from the highest ever, a year in which El Nino weather patterns were at their peak, it is cooler. Choosing virtually any other year as a start point contravenes that argument. The graphs of a respected climate scientists at realclimate.org that show the slowing trend just as clearly show that it is not cooling.
Fact or Fiction – Atmospheric Warming has simply been changed for Oceanic Warming
While none are really disputing the fact that the pace of global warming has decreased significantly the reason why is still a heated debate. Naysayers’ claim it is because it never existed to begin with as they have claimed all along. While they can choose to debate that climate is actually patterns based on multiple decades and centuries so the measurements of 25 years has no bearing they cannot claim that there are not significantly more greenhouse gasses in the atmosphere. The production and accumulation of greenhouse gasses is easily monitored and measured. I have not yet heard a reasonable argument that production of and accumulation of greenhouse gasses are a benefit in any way.
On the other side the most commonly advanced theory is that atmospheric warming has been temporarily replaced with oceanic warming. This is heavily pushed by multiple sources but an in depth explanation of Oceanic Warming gives pause to many as well. First and foremost is that it is all admittedly purely hypothesis with little or no actual data behind it. A closer look at the reasoning behind the theory is also concerning. While freely agreeing that all of their predictive models were wrong, most attribute a lot of that to the unpredictability or failure to take into consideration fully of El Nino and El Nina weather patterns and ocean currents.
El Nino is a well understood phenomenon that shows changes in ocean temperature has a direct and very rapid effect on atmospheric temperature. Using that as a basis to explain modeling problems in the past while at the same time claiming that theoretical ocean warming is not having the same effect now is counter intuitive at best. The theory that in 1999 the oceans became a giant heat sink and never had been before is very questionable.
The only real facts in this argument are that greenhouse gasses continue to accumulate at an alarmingly increasing rate and there is no good side to that and that climate prediction models are years from being fully developed or accurate. We do not have the knowledge and technology at the present time to accurately predict how bad or when but it is clear that there is far more downside than upside.
Facts on which we can all agree
We have come a long way in the last 25 years in terms of recycling and looking to sustainable renewable sources for energy and materials. Though implementation is far slower than ideal the technology and proven ability exists now to accelerate those processes. These are simple well founded applied sciences that can happen now. The result of more rapid implementation will be reduced greenhouse gases which will be better for the environment regardless of the weather patterns of any particular decade.
Diverting some of the think tank brain power and more importantly funding that is going into a theoretic debate on both sides into implementation programs will have immediate long lasting benefits to all. Further funding initiatives such as the Green Deal Initiative in the UK on a global level and insulating homes and buildings better to reduce common sources of greenhouse gasses combined with retrofitting manufacturing plants in 3rd world developing industries with known pollution reduction technology will make changes that cannot be argued.
This post was generously sponsored by the Mark Group, a UK based energy efficiency company.
I would just like to correct the opening ‘FACT’ which is wrong and quite misleading
Global warming hasn’t slowed in the last decade, it has actually accelerated. What you perhaps mean is that warming of the atmosphere has slowed, not the globe. Most of the heat from global warming is going into the oceans – over 90% of the total extra heat. And warming of the oceans hasn’t slowed, it has actually ACCELERATED in the last decade.
What has happened during this time is that more of the additional heat is being transported away from the surface of the ocean and down into the middle depths. As a result the surface layer of the ocean isn’t warming as much because more heat is going deeper. Because the ocean surface hasn’t warmed as fast, the atmosphere hasn’t warmed as fast either.
This change in where the heat is going appears to be being caused by an increase in the strength of the Trade Winds. These winds are part of what drives the formation of the huge ocean Gyres – huge circular currents the size of ocean basins. As they circulate water is pushed in towards the center of them. Since the water can’t build up forever it has to go somewhere, and the only place is down. These gyres produce regions of downwelling flow in their centers. As the Tradewinds have increased it appears these gyres, particularly in the South Pacific have ‘spun up’, pumping more water (and heat) downwards.
So too melting of ice hasn’t slowed, that has actually increased as well – 500 billion tonnes a year and rising. Melting ice takes heat.
And sea level rise hasn’t slowed, it is actually accelerating slightly. The oceans are a giant thermometer, they are the simplest indicator of what is going on.
Total global heating hasn’t slowed, it has accelerated. But where the heat is going at present has changed so that the amount of heat going into the atmosphere has declined – but heating the atmosphere is only around 2.5% of the extra heat.
The atmosphere is very much the tail that gets wagged by the oceanic dog.
Watch the dog, not its tail.
I appreciate you chiming in on this, Glenn – before I approved this post, I did a little digging around, and saw announcements of studies (from reputable media outlets) with the same wording used in the post here; thanks for taking the time to explain what this means in more detail.