New Scientist has an article out in this months maganzine that deals with the fate of our planet over the next 100 years and what we need to do in order to survive it. It sure as hell isn’t painting a very good picture at all if you haven’t changed your habits as of yet, in about 20-30 years you are going to look back and wished that as a species we had because things are going to start getting very bad very very quickly for most of the world.
Some Excepts from the article:
“ALLIGATORS basking off the English coast; a vast Brazilian desert; the mythical lost cities of Saigon, New Orleans, Venice and Mumbai; and 90 per cent of humanity vanished. Welcome to the world warmed by 4 °C.
Clearly this is a vision of the future that no one wants, but it might happen. Fearing that the best efforts to curb greenhouse gas emissions may fail, or that planetary climate feedback mechanisms will accelerate warming, some scientists and economists are considering not only what this world of the future might be like, but how it could sustain a growing human population. They argue that surviving in the kinds of numbers that exist today, or even more, will be possible, but only if we use our uniquely human ingenuity to cooperate as a species to radically reorganise our world.”
“A key factor in how well we deal with a warmer world is how much time we have to adapt. When, and if, we get this hot depends not only on how much greenhouse gas we pump into the atmosphere and how quickly, but how sensitive the world’s climate is to these gases. It also depends whether “tipping points” are reached, in which climate feedback mechanisms rapidly speed warming. According to models, we could cook the planet by 4 °C by 2100. Some scientists fear that we may get there as soon as 2050.”
“Glacial retreat will dry Europe’s rivers from the Danube to the Rhine, with similar effects in mountainous regions including the Peruvian Andes, and the Himalayan and Karakoram ranges, which as result will no longer supply water to Afghanistan, Pakistan, China, Bhutan, India and Vietnam.
Along with the exhaustion of aquifers, all this will lead to two latitudinal dry belts where human habitation will be impossible, say Syukuro Manabe of Tokyo University, Japan, and his colleagues. One will stretch across Central America, southern Europe and north Africa, south Asia and Japan; while the other will cover Madagascar, southern Africa, the Pacific Islands, and most of Australia and Chile (Climatic Change, vol 64, p 59).”
Half of the world’s surface lies in the tropics, between 30° and -30° latitude, and these areas are particularly vulnerable to climate change. India, Bangladesh and Pakistan, for example, will feel the force of a shorter but fiercer Asian monsoon, which will probably cause even more devastating floods than the area suffers now. Yet because the land will be hotter, this water will evaporate faster, leaving drought across Asia. Bangladesh stands to lose a third of its land area – including its main bread basket.
The African monsoon, although less well understood, is expected to become more intense, possibly leading to a greening of the semi-arid Sahel region, which stretches across the continent south of the Sahara desert. Other models, however, predict a worsening of drought all over Africa. A lack of fresh water will be felt elsewhere in the world, too, with warmer temperatures reducing soil moisture across China, the south-west US, Central America, most of South America and Australia. All of the world’s major deserts are predicted to expand, with the Sahara reaching right into central Europe.
Glacial retreat will dry Europe’s rivers from the Danube to the Rhine, with similar effects in mountainous regions including the Peruvian Andes, and the Himalayan and Karakoram ranges, which as result will no longer supply water to Afghanistan, Pakistan, China, Bhutan, India and Vietnam.
Along with the exhaustion of aquifers, all this will lead to two latitudinal dry belts where human habitation will be impossible, say Syukuro Manabe of Tokyo University, Japan, and his colleagues. One will stretch across Central America, southern Europe and north Africa, south Asia and Japan; while the other will cover Madagascar, southern Africa, the Pacific Islands, and most of Australia and Chile (Climatic Change, vol 64, p 59).
The high life The only places we will be guaranteed enough water will be in the high latitudes. “Everything in that region will be growing like mad. That’s where all the life will be,” says former NASA scientist James Lovelock, who developed the “Gaia” theory, which describes the Earth as a self-regulating entity. “The rest of the world will be largely desert with a few oases.”
So if only a fraction of the planet will be habitable, how will our vast population survive? Some, like Lovelock, are less than optimistic. “Humans are in a pretty difficult position and I don’t think they are clever enough to handle what’s ahead. I think they’ll survive as a species all right, but the cull during this century is going to be huge,” he says. “The number remaining at the end of the century will probably be a billion or less.”
Humans will survive as a species, but the cull this century will be huge
John Schellnhuber of the Potsdam Institute for Climate Impacts Research in Germany is more hopeful. The 4 °C warmer world would be a huge challenge, he says, but one we could rise to. “Would we be able to live within our resources, in this world? I think it could work with a new division of land and production.”
In order to survive, humans may need to do something radical: rethink our society not along geopolitical lines but in terms of resource distribution. “We are locked into a mindset that each country has to be self-sustaining in food, water and energy,” Cox says. “We need to look at the world afresh and see it in terms of where the resources are, and then plan the population, food and energy production around that. If aliens came to Earth they’d think it was crazy that some of the driest parts of the world, such as Pakistan and Egypt, grow some of the thirstiest crops for export, like rice.”
“This will probably be a mostly vegetarian world: the warming, acidic seas will be largely devoid of fish, thanks to a crash in plankton that use calcium carbonate to build shells. Molluscs, also unable to grow their carbonate shells, will become extinct. Poultry may be viable on the edges of farmland but there will simply be no room to graze cattle”
“Even so, the most terrifying prospect of a world warmed by 4 °C is that it may be impossible to return to anything resembling today’s varied and abundant Earth. Worse still, most models agree that once there is a 4 °C rise, the juggernaut of warming will be unstoppable, and humanity’s fate more uncertain than ever.
“I would like to be optimistic that we’ll survive, but I’ve got no good reason to be,” says Crutzen. “In order to be safe, we would have to reduce our carbon emissions by 70 per cent by 2015. We are currently putting in 3 per cent more each year.”
