Gwynne Dyer
1 November 2009
Kampala — THE news is bad, and it is coming in fast. Turn tens of thousands of scientists lose on a problem for two decades, and the results will seem pathetic for the first few years, because it takes time to gather the data - even to build the equipment with which you gather the data. But slowly the flow of data will grow, and at the end of 20 years, you can expect major new insights every month or so.
That is where we are now with climate change. September's unwelcome news, from the Hadley Centre for Climate Prediction and Research in Britain, was that if fossil fuel use continues on the present trend line, the planet will be an average of 4 degrees C warmer by the 2060s. This contrasts with the prediction of the Intergovernmental Panel on Climate Change, published in 2007, that we might see 4 degrees C, at the most, by 2100.
This month's bad news came from the drilling ship JOIDES Resolution (Joint Oceanographic Institutions for Deep Earth Sampling), which brought up cores from the ocean bottom containing sediments dating back 20 million years. The news was that when the carbon dioxide in the atmosphere was last at 450 parts per million, the average global temperature was three to six degrees C hotter than now, and the sea level was 25-40 metres (80-130ft) higher.
That is bad news because 450 parts per million is where we are hoping to halt the rise in CO2 in the atmosphere this time around. (We are currently at 390 ppm.)
All the world's major governments have agreed in principle that the warming must never be allowed to exceed two degrees C, because beyond that, we risk runaway warming - and it was thought that 450 ppm would let us stop at that point. Not so, it would appear, or at least not for long.
The leader of the JOIDES research team, Aradhna Tripati of the University of California at Los Angeles, put it bluntly: "What we have shown is that in the last period when CO2 levels were sustained at levels close to where they are today, there was no icecap on Antarctica and sea levels were 25-40m higher."
Suspicions that the 450 ppm target is much too high have been growing for some time. Late in 2007 James Hansen, the director of NASA's Goddard Institute for Space Studies in New York, made a public appeal at a meeting of the American Geophysical Union to move to a 350 ppm target.
Hansen's study of ancient climates had led him to the conclusion that the first time permanent ice appeared on the planet, after a complete absence for tens of millions of years, was when the amount of carbon dioxide fell to 425 ppm some 35 million years ago.
His calculations had a possible error of plus or minus 75 ppm, so for safety's sake, he settled on 350 ppm as the long-term target for human stewardship of the atmosphere.
Did that word "stewardship" throw you? Many people instinctively recoil from any direct human intervention in the atmosphere, on the grounds that we do not know enough to get it right. But when we have already been changing the atmosphere unintentionally for two centuries, since the start of the industrial revolution, it is a bit late for such qualms. We have already destabilised it, and only we can reverse the changes we have caused.
Hansen even thought that 350 ppm might still be too high, because the "normal" level of CO2 during the 10,000 years of human civilisation, before we began burning fossil fuels, was only 280 ppm. Now JOIDES has given us a more accurate measure of ancient climate, from closer to the present.
By 20 million years ago, almost all the ice on the planet had been lost again, due to a prolonged period of volcanic activity in the Columbia River basin of North America. The carbon dioxide emitted by that activity had raised the average global temperature to three to six degrees C above the current level, and all the melted ice had raised the seal level by 25-40 metres. But the actual level of CO2 that caused all that was only 400 ppm.
We will be there in five years, but we must not stay there for very long or history will repeat itself. In reality, we are going to go to at least 450 ppm, and more likely 500 ppm, before we get our emissions under control. And then we will have to commence the long and arduous task of getting the CO2 in the atmosphere down to a level that will preserve our present climate over the long term. That may have to be as low as 300 ppm.
And all through that time, we must prevent the warming from exceeding 2 degrees C, which means that a resort to various methods of geo-engineering to keep the heat down is almost unavoidable. That is what these numbers are telling us, and we would be wise to listen.
The writer is a London-based independent journalist
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A very interesting and thoughtful article. The best way for Africa to help itself with GHG is to stop exporting oil and gas to the outside world. Gas that is valuable enough to ship abroad and sell should be sold at a price that is competitive enough to keep it home. Catch all of that gas, and use it for yourselves. You will then have electricity and cooking fuel both. It is maddening to see forests felled for charcoal cooking fuel while cleaner-to-use gas is being wasted. Each of your nations should try to be the last to run out of fuel. Move to solar, wind, geothermal and biofuels from wastes for your energy sources.
Other activities to fight climate change troubles include the restoration of your waterways to full functionality by clearing the weeds that clog them and the silt that they have left behind.
Just a factual correction. Nigerian LNG is not sold to Benin, Togo and Ghana. There is a gas pipeline from Nigeria to these three countries. But it does not carry LNG. It carries natural gas under pressure. Unfortunately, becuse there is insufficient gas being gathered and shipped from Nigeria, the pipeline has been empty for over a year.
In today's climate talk that's going and will be converse more in December must not be damaging to Africa. Together, Africa MUST STAND FIRMLY and get what she deserves - BETTER and LASTING AGREEMENT. That's, what is beneficial for Africa. Any negativities effects concerning our people standard of living MUST NOT be accepted by any Africa Government. The days of a/an African Live seeing as less than an insect or any other most be OVER and SHOULD NOT be negotiated in any Climate talks. Our "Africans" lives and living standard is/are as important as any other lives. Therefore, as Africans head to the climate talk in December, please open your ears, listen carefully, don't be trick, and don't accept anything lesser to solve your prombles for the betterness of your people in the whole of Africa - period !!!!! The days of damaging Africans' lives, enviroment, living conditions; the physical and metal abuses should and most all come to an end. Therefore, we "Africans" should not be conveince with their sweet tooth to accept something lesser where'in our people keep continue to suffer and die for their pleasures and the lack of consideration for Africans lives and living standards. God Bless Africa
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