Climate Change: the facts

13 08 2019

Last night, I watched “Climate Change: the facts” presented by David Attenborough

Image result for d"david attenborough" "climate change" the facts

https://iview.abc.net.au/show/climate-change-the-facts/video/ZW2018A001S00

That link won’t let me watch it in my Linux laptop, though it worked on my phone and the smart TV we watch in the house we currently rent to as we while away Winter as I try to get the house ready for Christmas…… I can’t in all honesty recommend it, it was just as disappointing as I expected. Most of my readers already know climate change is upon us, and will most likely realise it will be the demise of nature for millions of years, and our civilisation; watching this film will not make you change your mind….!

It presents why we have to act urgently, with well known talking heads like Michael Mann and James Hansen, though, for a British film, it left out Kevin Andersen…. It’s the heavily laid on hopium at the end that had had me writhing in my seat……

It also tells huge porkies. Like saying the UK generates 30% of its electricity from renewables while leaving out the fact all the wind turbines were idle for a week during a complete lull in the weather.

Then it presented electric vehicles, and hydrogen powered ones, as a fait accompli. But they really lost me when the BBC stated “the science is in, we have to stop eating meat”

As my friend Jacqueline recently wrote, “We need to change our entire agricultural system. ALL of it, not just the beef and dairy. We need local food production, agro-ecological, that means that it doesn’t damage the ‘environment’ in production, and that also means that the type of agriculture has to fit with the local ‘biome’. If we do that, we will have a healthy diet with small amounts of everything on healthy land, with healthy animals and healthy farmers and consumers. We’d be paying farmers directly and they wouldn’t be spending so much on pesticides, fertilisers and feed that only make the corporations rich.

As long as people say ‘get rid of cows’ instead of ‘change the entire industrial agricultural system’, we are still going to be destroying everything. 

Incidentally, cows kept under appropriate conditions (silvo-pasture for example) so they can graze and browse don’t drink millions of litres a year because they get their water from the grass. And believe it or not, there are good farmers who grow food appropriately and keep cattle in ways that actually improve soil health and sequester carbon.”

The problem with shows like this is that they only concentrate on one admittedly serious problem; as we know here, we’re heading into all sorts of trouble. I was recently asked on social media, which was worse: climate change, economic collapse, peak oil, or the 6th mass extinction? This is of course typical human compartmentalisation; it’s not a contest I replied, it’s a perfect storm…… To his credit, Attenborough did mention the 6th extinction, after all nature is his specialty.

The real problem with this show is that Attenborough’s credibility is right up there, especially when governments and politicians virtually have zero, and his opinion, even if shaped by the BBC, carries a whole lot of weight. After watching this, millions of people will believe “we’re onto it”, and the solutions are at hand. Except they are not….





But it is worse than that…

13 05 2019


From a friend who lives in Thailand…

Smog, Smog, Smog for three months. February to April and then into March, the same pattern we have been writing about for years. This year folks were saying ‘Why not declare a “Smoke Emergency” ?’
The trouble is that it is much, much worse than that as this scientist details from his Facebook blog…

Part 1

Marc Doll
25 January
Last update: May 8th

I realize there is something I have known for some time but have never said, and, since I have just spent another 4 hours of my life in climate change academia I have to get this out of my system.

Please understand that many of you reading this won’t live to a ripe old age… and likely will start scrolling after one or 2 more paragraphs… (edit…Ok I was wrong on this point. This is now my 2nd most shared post of all time.. (edit)…make that my most shared)

The IPCC report and Paris accord are incredibly overly optimistic and that commits the world to a target that means the death of hundreds of millions if not more.

But it is worse than that.

Even the commitments made by countries in the Paris accord don’t get us to a 2 degree world.

But it is worse than that.

The 2 degree target is now unattainable (unless of course the entirety of civilization does a 180 today…) and is based on geo-engineering the climate of the earth as well as the sequestering of every molecule of carbon we have produced since 1987, as well as every molecule we are producing today, as well as every molecule we produce tomorrow…. with magical technologies that don’t exist, won’t exist and, even if they did would likely cause as many if not more problems than they fix.

But it is worse than that.

The 2 degree target of the IPCC does not factor in the feedback loops such as the increased absorption of heat due to a drastic reduction in the albedo (reflectivity) effect caused by the 70% loss of arctic ice, and the release of methane from a thawing arctic (there is more energy stored in the arctic methane than there is in coal in all the world). This is called the methane dragon. If the process of the release of the methane, currently frozen in the soil and ocean beds of the arctic, which may have already begun, spins out of control we are looking at an 8 degree rise in temperature.

But it is worse than that.

The report which gives us 12 years to get our heads out of our arses underestimated the amount of heat stored in the world’s oceans, as we discovered in mid-January, by 40%… so no , we don’t have 12 more years.

But it is worse than that

The conservative American Meteorological Society indicates that our willful blindness and greed will have effects well beyond the climate. The worlds oceans will see a 150% increase in acidity and over a full degree Celsius in warming. This is well down the path to the Permian extinction where 96% of marine species disappeared forever.

But it is worse than that.

The IPCC report ignores the effects of humans messing up the Nitrogen cycle through agricultural fertilizers and more… Don’t go down this rabbit hole if you want to sleep at night.

But it is worse than that.

Sea level rise will not be gradual. Even assuming that the billions of tons of water that is currently being dumped down to the ground level of Greenland isn’t creating a lubricant which eventually will allow the ice to free-flow into the northern oceans; it is only the friction to the islands surface that is currently holding the ice back. Then consider the same process is happening in Antarctica but is also coupled with the disappearance of the ice shelves which act as buttresses holding the glaciers from free flowing into the southern ocean. Then factor in thermal expansions; the simple fact that warmer water takes up more space and It becomes clear that we are not looking at maintaining the current 3.4mm/yr increase in sea level rise (which incidentally is terrifying when you multiply it out over decades and centuries.) We will be looking at major calving events that will result in much bigger yearly increases coupled with an exponential increase in glacial melting. We know that every increase of 100ppm of C02 increases sea level by about 100 feet. We have already baked in 130 feet of sea level rise. It is just a question of how long it is going to take to get there… and then keep on rising..

But it is worse than that.

Insects are disappearing at 6 times the speed of larger animals and at a rate of about 2.5% of their biomass every year. These are our pollinators. These are links in our food chain. These represent the basic functioning of every terrestrial ecosystem/

But it is worse than that.

58% of the biomass of vertebrate life on earth has been lost since 1970. That is basically in my lifetime! Additionally, a new study has shown that over 1 million species are now in danger of extinction due to human activity. Millions of years of evolution are being wiped out on a daily bases.

But it is worse than that.

The amount of Carbon we add to the atmosphere is equal to a yearly human caused forest fire 20% bigger than the continent of Africa. Yes, that is every single year!

But it is worse than that.

Drought in nearly every food …

…to be continued





Adding balance to the meat debate

18 02 2019

Of late, I have seen article after article, video after video, exposing ‘meat eating’ as a culprit for the exploding greenhouse emissions we are experiencing. And when I point out it’s all rubbish, I’m attacked as a climate denier….. ME!  A climate denier…?!

There’s so much to say about this topic, it’s hard to know where to start, but I will just say this; meat consumption is not the issue, the predicament is industrial agriculture, pure and simple…… so instead of blaming animal farming, commentators should be attacking the entrenched conventional farming system that needs to be destroyed.

If you are a vegan or vegetarian, the consumption of your diet is just as harmful as the consumption of unsustainable meat. Are you listening George Monbiot? George is one of those classic deniers of the truth. He recently wrote “76% of farmland is wasted on farming animals”. And what does George know about farming?  Zilch I’ll bet…… because farms that grow meat are incapable of growing anything else, otherwise meat would not be produced there.

When soil incapable of growing edible vegetable matter for people is converted to this use, it’s only possible because of the addition of untold chemicals which, since the beginning of the ‘green revolution’, a completely wrong use of the term ‘green’ by the way…..


This opinion piece by Richard Young was originally published by Triodos Bank here


Grazing animals have shaped the quintessentially pastoral British countryside for thousands of years and play a vital role in sustainable food systems. However, over the last decade or so we’ve been told by a succession of high-profile reports that we have to make drastic cuts in our consumption of meat in order to help limit global warming, biodiversity loss and other agriculture-related problems. This has left many people confused about what they should eat to be healthy and have a sustainable lifestyle.

The authors of these reports, such as the recent EAT-Lancet report, all correctly highlight the problems for humanity caused by a rapidly growing global population, high meat consumption in developed countries and an increasing appetite – or in some cases nutritional need – for meat in many developing countries. However, the focus is always put on cutting out red meat, rather than poultry, and no distinction is made in the way the meat is produced.

The basic reason for this is that all cattle, sheep and other ruminants emit the greenhouse gas methane, while chickens do not. They also convert grain to protein less efficiently than poultry or pigs.

It is predicted that by 2050 another billion tonnes of grain will be needed every year to produce enough meat to feed the global population, something which is clearly unsustainable, since continuous grain production is one of the biggest causes of soil degradation and loss. Indeed, globally, cropland soils continue to degrade as carbon is lost to the atmosphere – 24 billion tonnes of soil is lost annually, over three tonnes for every person on the planet.

However, what the researchers invariably overlook is that this is only an issue in relation to grain-fed cattle, such as those in US feedlots, whose rations consist of maize, soya meal and chopped straw.

In contrast, two-thirds of UK farmland is under grass, in most cases because the land is not suitable for growing crops. The only practical way to get food from this land without causing an environmental disaster is to graze it with livestock. Almost all cattle and sheep in the UK are predominantly fed on grass, grazed in the fields during summer and fed as hay or silage over winter – and the UK has one of the best climates in the world for growing grass. Some of these animals do also get grain, but in many cases this is waste grain, like Brewer’s grain (what’s left after beer making), which humans cannot eat.

Tragically, a high proportion of the UK’s most species-rich grasslands have in the past been ploughed for cropping or resown with ryegrass monocultures. However, all organic and most pasture-fed meat producers include legumes, multiple grass species and herbs in their grazing mixtures. Even many intensive farmers have now been persuaded by agri-environment schemes to restore grassland diversity, with wild flowers and delicate species getting a chance to recover once the use of synthetic fertilisers ceases. This in turn helps to revive the intricate web of life, which begins with microbes, soil spiders and other insects, embraces farmland birds and small mammals, and ultimately sustains us humans.

While over-grazing was encouraged by farm subsidies prior to the early 1990s, some grassland is now under-grazed due to falling demand for lamb. This is a problem because many bird and butterfly species have evolved in tandem with grazing livestock. In fact, both the RSPB and Natural England recognise that grazing animals are essential for sustaining healthy wildlife populations.

But what about methane? The high methane levels in the atmosphere are a significant cause of global warming, yet ruminants are responsible for only 5% of UK anthropogenic greenhouse gas emissions. What’s more, all the carbon in ruminant methane is recycled carbon – grazing animals can’t add more carbon to the atmosphere than the plants they eat take out by photosynthesis. In fact, fossil fuels are not only the main source of carbon dioxide emissions, they are also responsible for a third more methane than ruminants and all the methane from fossil fuels contains additional, ‘fossil’ carbon.

So what meat should we choose to help sustain the planet? It’s not a red versus white issue. The simple answer is that we should eat far less grain-fed meat, be it beef, pork or chicken, instead we should actively seek grass-fed meat and meat from animals supplemented with only small amounts of otherwise waste grain.

While few people yet realise it, we actually need to encourage increased production of grass-fed meat, since the most effective way to restore our degraded arable soils and wild pollinators is to re-introduce grass and grazing animals into cropland rotations.






This civilisation is finished: so what is to be done?

12 02 2019

Rupert Read, Environmental Philosopher and Chair of Green House Think Tank. The Paris Agreement explicitly commits us to use non-existent, utterly reckless, unaffordable and ineffective ‘Negative Emissions Technologies’ which will almost certainly fail to be realised. Barring a multifaceted miracle, within a generation, we will be facing an exponentially rising tide of climate disasters that will bring this civilization down. We, therefore, need to engage with climate realism.

This means an epic struggle to mitigate and adapt, an epic struggle to take on the climate-criminals and, notably, to start planning seriously for civilizational collapse. Dr Rupert Read is a Reader in Philosophy at the University of East Anglia. Rupert is a specialist in Wittgenstein, environmental philosophy, critiques of Rawlsian liberalism, and philosophy of film. His research in environmental ethics and economics has included publications on problems of ‘natural capital’ valuations of nature, as well as pioneering work on the Precautionary Principle.

Recently, his work was cited by the Supreme Court of the Philippines in their landmark decision to ban the cultivation of GM aubergine. Rupert is also chair of the UK-based post-growth think tank, Green House, and is a former Green Party of England & Wales councillor, spokesperson, European parliamentary candidate and national parliamentary candidate. He stood as the Green Party MP-candidate for Cambridge in 2015.

About the series Shed A Light is a series of talks that seek to present alternative framings of future human-nature interactions and the pragmatic solution pathways that we could take to get there. By recognising the interlinkages between struggles for ecological, social and economic justice in addition to the desperate need for immediate societal transformation, Shed A Light aims to engage everyone with the green agenda and prompt broad-based discussions on sustainability issues. Filmed at Churchill College, 7 November 2018.





Meet Joel Salatin……

29 10 2018

I’ve been following Salatin for years, and he is truly inspiring…….  my goal is to run the Fanny Farm as a scaled down version of Polyface Farm……. I do wish he wouldn’t put all ‘greenies’ in the same basket though!

The following post originally appeared on the Polyface Farms Facebook page.

Cows at Polyface Farm. Photo by Amber Karnes.

The recent editorial by James McWilliams, titled “The Myth of Sustainable Meat,” contains enough factual errors and skewed assumptions to fill a book, and normally I would dismiss this out of hand as too much nonsense to merit a response. But since it specifically mentioned Polyface, a rebuttal is appropriate. For a more comprehensive rebuttal, read the book Folks, This Ain’t Normal.

Let’s go point by point. First, that grass-grazing cows emit more methane than grain-fed ones. This is factually false. Actually, the amount of methane emitted by fermentation is the same whether it occurs in the cow or outside. Whether the feed is eaten by an herbivore or left to rot on its own, the methane generated is identical. Wetlands emit some 95 percent of all methane in the world; herbivores are insignificant enough to not even merit consideration. Anyone who really wants to stop methane needs to start draining wetlands. Quick, or we’ll all perish. I assume he’s figuring that since it takes longer to grow a beef on grass than on grain, the difference in time adds days to the emissions. But grain production carries a host of maladies far worse than methane. This is simply cherry-picking one negative out of many positives to smear the foundation of how soil builds: herbivore pruning, perennial disturbance-rest cycles, solar-grown biomass, and decomposition. This is like demonizing marriage because a good one will include some arguments.

Apparently if you lie often and big enough, some people will believe it: Pastured chicken has a 20 percent greater impact on global warming? Says who? The truth is that those industrial chicken houses are not stand-alone structures. They require square miles of grain to be carted into them, and square miles of land to handle the manure. Of course, many times that land is not enough. To industrial farmers’ relief, more often than not a hurricane comes along just in time to flush the toilet, kill the fish, and send pathogens into the ocean. That’s a nice way to reduce the alleged footprint, but it’s devilish sleight of hand with the data to assume that ecological toxicity compensates for the true land base needed to sustain a factory farm.

While it’s true that at Polyface our omnivores (poultry and pigs) do eat local GMO (genetically modified organism)-free grain in addition to the forage, the land base required to feed and metabolize the manure is no different than that needed to sustain the same animals in a confinement setting. Even if they ate zero pasturage, the land is the same. The only difference is our animals get sunshine, exercise, fresh pasture salad bars, fresh air, and a respectful life. Chickens walking on pasture certainly do not have any more leg sprains than those walking in a confinement facility. To suggest otherwise, as McWilliams does, is sheer nonsense. Walking is walking — and it’s generally considered to be a healthy practice, unless you’re a tyrant.

Interestingly, in a lone concession to compassion, McWilliams decries ranging hogs with rings in their noses to keep them from rooting, lamenting that this is “one of their most basic instincts.” Notice that he does not reconcile this moral imperative with his love affair with confinement hog factories. Nothing much to use their noses for in there. For the record, Polyface never rings hog noses, and in the few cases where we’ve purchased hogs with rings, we take them out. We want them to fully express their pigness. By moving them frequently using modern electric fencing, polyethylene water piping, high-tech float valves, and scientifically designed feed dispensers, we do not create nor suffer the problems encountered by earlier large-scale outdoor hog operations 100 years ago. McWilliams has apparently never had the privilege of visiting a first-rate, modern, highly managed, pastured hog operation. He thinks we’re all stuck in the early 1900s, and that’s a shame because he’d discover the answers to his concerns are already here. I wonder where his paycheck comes from?

Then McWilliams moves on to the argument that economic realities would kick in if pastured livestock became normal, driving farmers to scale up and end up right where we are today. What a clever ploy: justify the horrible by eliminating the alternatives. At Polyface, we certainly do not discourage scaling up — we actually encourage it. We think more pasture-based farms should scale up. Between the current abysmal state of mismanagement, however, and efficient operations, is an astronomical opportunity to enjoy economic and ecological advantages. McWilliams is basing his data and assumptions on the poorest, the average or below. If you want to demonize something, always pick the lowest performers. But if you compare the best the industry has to offer with the best the pasture-based systems have to offer, the factory farms don’t have a prayer. Using portable infrastructure, tight management, and techno-glitzy tools, farmers running pastured hog operations practically eliminate capitalization costs and vet bills.

Finally, McWilliams moves to the knock-out punch in his discussion of nutrient cycling, charging specifically that Polyface is a charade because it depends on grain from industrial farms to maintain soil fertility. First of all, at Polyface we do not assume that all nutrient movement is anti-environmental. In fact, one of the biggest reasons for animals in nature is to move nutrients uphill, against the natural gravitational flow from high ground to low ground. This is why low lands and valleys are fertile and the uplands are less so. Animals are the only mechanism nature has to defy this natural downward flow. Fortunately, predators make the prey animals want to lounge on high ground (where they can see their enemies), which insures that manure will concentrate on high lookout spots rather than in the valleys. Perhaps this is why no ecosystem exists that is devoid of animals. The fact is that nutrient movement is inherently nature-healing.

But, it doesn’t move very far. And herein lies the difference between grain used at Polyface and that used by the industry: We care where ours comes from. It’s not just a commodity. It has an origin and an ending, start to finish, farmer to eater. The closer we can connect the carbon cycles, the more environmentally normal we will become.

Second, herbivores are the exception to the entire negative nutrient flow argument because by pruning back the forage to restart the rapid biomass accumulation photosynthetic engine, the net carbon flow compensates for anything lost through harvest. Herbivores do not require tillage or annuals, and that is why all historically deep soils have been created by them, not by omnivores. It’s fascinating that McWilliams wants to demonize pasture-based livestock for not closing all the nutrient loops, but has no problem, apparently, with the horrendous nutrient toxicity like dead zones in the Gulf of Mexico the size of New Jersey created by chemical fertilizer runoff to grow grain so that the life of a beef could be shortened. Unbelievable. In addition, this is one reason Polyface continues to fight for relaxing food safety regulations to allow on-farm slaughtering, precisely so we can indeed keep all these nutrients on the farm and not send them the rendering plants. If the greenies who don’t want historically normal farm activities like slaughter to occur on rural acreage could understand how devastating these government regulations actually are to the environmental economy, perhaps McWilliams wouldn’t have this bullet in his arsenal. And yes, human waste should be put back on the land as well, to help close the loop.

Third, at Polyface, we struggle upstream. Historically, omnivores were salvage operations. Hogs ate spoiled milk, whey, acorns, chestnuts, spoiled fruit, and a host of other farmstead products. Ditto for chickens, who dined on kitchen scraps and garden refuse. That today 50 percent of all the human edible food produced in the world goes into landfills or greenie-endorsed composting operations rather than through omnivores is both ecologically and morally reprehensible. At Polyface, we’ve tried for many, many years to get kitchen scraps back from restaurants to feed our poultry, but the logistics are a nightmare. The fact is that in America we have created a segregated food and farming system. In the perfect world, Polyface would not sell eggs. Instead, every kitchen, both domestic and commercial, would have enough chickens proximate to handle all the scraps. This would eliminate the entire egg industry and current heavy grain feeding paradigm. At Polyface, we only purport to be doing the best we can do as we struggle through a deviant, historically abnormal food and farming system. We didn’t create what is and we may not solve it perfectly. But we’re sure a lot farther toward real solutions than McWilliams can imagine. And if society would move where we want to go, and the government regulators would let us move where we need to go, and the industry would not try to criminalize us as we try to go there, we’ll all be a whole lot better off and the earthworms will dance.

AND here’s a lecture Joel gave in Australia last year……..





Methane and climate: 10 things you should know

15 09 2018

The graph above shows methane concentrations in Earth’s atmosphere over the past 10,000+ years: 8000 BCE to 2018 CE.  The units are parts per billion (ppb).  The year 1800 is marked with a circle.

Note the ominous spike.  As a result of increasing human-caused emissions, atmospheric methane levels today are two-and-a-half times higher than in 1800.  After thousands of years of relatively stable concentrations, we have driven the trendline to near-vertical.

Here are 10 things you should know about methane and the climate:

1. Methane (CH4) is one of the three main greenhouse gases, along with carbon dioxide (CO2) and nitrous oxide (N2O).

2. Methane is responsible for roughly 20% of warming, while carbon dioxide is responsible for roughly 70%, and nitrous oxide the remaining 10%.

3. Methane is a powerful greenhouse gas (GHG).  Pound for pound, it is 28 times more effective at trapping heat than is carbon dioxide (when compared over a 100-year time horizon, and 84 times as effective at trapping heat when compared over 20 years).  Though humans emit more carbon dioxide than methane, each tonne of the latter traps more heat.

4. Fossil-fuel production is the largest single source.  Natural gas is largely made up of methane (about 90%).  When energy companies drill wells, “frac” wells, and pump natural gas through vast distribution networks some of that methane escapes.  (In the US alone, there are 500,000 natural gas wells, more than 3 million kilometers of pipes, and millions of valves, fittings, and compressors; see reports here and here.)  Oil and coal production also release methane—often vented into the atmosphere from coal mines and oil wells.  Fossil-fuel production is responsible for about 19% of total (human-caused and natural) methane emissions.  (An excellent article by Saunois et al. is the source for this percentage and many other facts in this blog post.)  In Canada, policies to reduce energy-sector methane emissions by 40 percent will be phased in over the next seven years, but implementation of those policies has been repeatedly delayed.

5. Too much leakage makes electricity produced using natural gas as climate-damaging as electricity from coal.  One report found that for natural gas to have lower overall emissions than coal the leakage rate would have to be below 3.2%.  A recent study estimates leakage in the US at 2.3%.  Rates in Russia, which supplies much of the gas for the EU, are even higher.  Until we reduce leakage rates, the advantage of shutting down coal-fired power plants and replacing them with natural gas generation will remain much more modest than often claimed.

6. Domestic livestock are the next largest source of methane.  Cattle, sheep,  and other livestock that graze on grass emit methane from their stomachs through their mouths.  This methane is produced by the symbiotic bacteria that live in the guts of these “ruminants” and enable them to digest grass and hay.  In addition, manure stored in liquid form also emits methane.  Livestock and manure are responsible for roughly 18% of total methane emissions.

7. Rice paddy agriculture, decomposing organic matter in landfills, and biomass burning also contribute to methane emissions.  Overall, human-caused emissions make up about 60% of the total.  And natural sources (wetlands, swamps, wild ruminants, etc.) contribute the remaining 40%.

8. There is lots of uncertainty about emissions.  Fossil fuel production and livestock may be responsible for larger quantities than is generally acknowledged.  The rise in atmospheric concentrations is precisely documented, but the relative balance between sources and sinks and the relative contribution of each source is not precisely known.

9. There is a lot of potential methane out there, and we risk releasing it.  Most of the increase in emissions in recent centuries has come from human systems (fossil fuel, livestock, and rice production; and landfills).  Emissions from natural systems (swamps and wetlands, etc.) have not increased by nearly as much.  But that can change.  If human actions continue to cause the planet to warm, natural methane emissions will rise as permafrost thaws.  (Permafrost contains huge quantities of organic material, and when that material thaws and decomposes in wet conditions micro-organisms can turn it into methane.)  Any such release of methane will cause more warming which can thaw more permafrost and release more methane which will cause more warming—a positive feedback.

Moreover, oceans, or more specifically their continental shelves, contain vast quantities of methane in the form of “methane hydrates” or “clathrates”—ice structures that hold methane stable so long as the temperature remains cold enough.  But heat up the coastal oceans and some of that methane could begin to bubble up to the surface.  And there are huge amounts of methane contained in those hydrates—the equivalent of more than 1,000 years of human-caused emissions.  We risk setting off the “methane bomb“—a runaway warming scenario that could raise global temperatures many degrees and catastrophically damage the biosphere and human civilization.

Admittedly, the methane bomb scenario is unlikely to come to pass.  While some scientists are extremely concerned, a larger number downplay or dismiss it.  Nonetheless a runaway positive feedback involving methane represents a low-probability but massive-impact risk; our day-to-day actions are creating a small risk of destroying all of civilization and most life on Earth.

10. We can easily reduce atmospheric methane concentrations and  attendant warming; this is the good news.  Methane is not like CO2, which stays in the atmosphere for centuries.  No, methane is a “short-lived” gas.  On average, it stays in the atmosphere for less than ten years.  Many natural processes work to strip it out of the air.  Currently, human and natural sources emit about 558 million tonnes of methane per year, and natural processes in the atmosphere and soils remove all but 10 million tonnes.  (again, see Saunois et al.)  Despite our huge increase in methane production, sources and sinks are not that far out of balance.  Therefore, if we stop increasing our emissions then atmospheric concentrations could begin to fall.  We might see significant declines in just decades.  This isn’t the case for CO2, which will stay in the atmosphere for centuries.  But with methane, we have a real chance of reducing atmospheric levels and, as we do so, moderating warming and slowing climate change.

A series of policies focused on minimizing emissions from the fossil-fuel sector (banning venting and minimizing leaks from drilling and fracking and from pipes) could bring the rate of methane creation below the rate of removal and cause atmospheric levels to fall.  A more rational approach to meat production (including curbing over-consumption in North America and elsewhere) could further reduce emissions.  This is very promising news.  Methane reduction represents a “low-hanging fruit” when it comes to moderating climate change.

The methane problem is the climate problem in microcosm.  There are some relatively simple, affordable steps we can take now that will make a positive difference.  But, if we don’t act fast, aggressively, and effectively, we risk unleashing a whole range of effects that will swiftly move our climate into chaos and deprive humans of the possibility of limiting warming to manageable levels.  We can act to create some good news today, or we can suffer a world of bad news tomorrow.

Graph sources:
– United States Environmental Protection Agency (US EPA), “Climate Change Indicators: Atmospheric Concentrations of Greenhouse Gases.
– Commonwealth Scientific and Industrial Research Organisation (CSIRO), “Latest Cape Grim Greenhouse Gas Data.
– National Oceanic and Atmospheric Administration (NOAA), Earth System Research Laboratory, Global Monitoring Division, “Trends in Atmospheric Methane.





Beyond the Point of No Return

4 12 2016

Imminent Carbon Feedbacks Just Made the Stakes for Global Warming a Hell of a Lot Higher

Republished from Robert Scribbler’s excellent website……..

If EVER there was a need to start soil farming, this proves it beyond doubt.

“It’s fair to say we have passed the point of no return on global warming and we can’t reverse the effects, but certainly we can dampen them,” said biodiversity expert Dr. Thomas Crowther.

“I’m an optimist and still believe that it is not too late, but we urgently need to develop a global economy driven by sustainable energy sources and start using CO2, as a substrate, instead of a waste product.” — Prof Ivan Janssens, recognized as a godfather of the global ecology field.

“…we are at the most dangerous moment in the development of humanity. We now have the technology to destroy the planet on which we live, but have not yet developed the ability to escape it… we only have one planet, and we need to work together to protect it.” — Professor Stephen Hawking yesterday in The Guardian.

*****

The pathway for preventing catastrophic climate change just got a whole hell of a lot narrower.

For according to new, conservative estimates in a scientific study led by Dr. Thomas Crowther, increasing soil respiration alone is about to add between 0.45 and 0.71 parts per million of CO2 to the atmosphere every year between now and 2050.

(Thomas Crowther explains why rapidly reducing human greenhouse gas emissions is so important. Namely, you want to do everything you can to avoid a runaway into a hothouse environment that essentially occurs over just one Century. Video source: Netherlands Institute of Ecology.)

What this means is that even if all of human fossil fuel emissions stop, the Earth environment, from this single source, will generate about the same carbon emission as all of the world’s fossil fuel industry did during the middle of the 20th Century. And that, if human emissions do not stop, then the pace of global warming of the oceans, ice sheets, and atmosphere is set to accelerate in a runaway warming event over the next 85 years.

Global Warming Activates Soil Respiration Which Produces More CO2

This happens because as the world warms, carbon is baked out of previously inactive soils through a process known as respiration. As a basic explanation, micro-organisms called heterotrophs consume carbon in the soil and produce carbon dioxide as a bi-product. Warmth is required to fuel this process. And large sections of the world that were previously too cold to support large scale respiration and CO2 production by heterotrophs and other organisms are now warming up. The result is that places like Siberian Russia, Northern Europe, Canada, and Alaska are about to contribute a whole hell of a lot more CO2 (and methane) to the atmosphere than they did during the 20th Century.

When initial warming caused by fossil fuel burning pumps more carbon out of the global environment, we call this an amplifying feedback. It’s a critical climate tipping point when the global carbon system in the natural environment starts to run away from us.

Sadly, soil respiration is just one potential feedback mechanism that can produce added greenhouse gasses as the Earth warms. Warming oceans take in less carbon and are capable of producing their own carbon sources as they acidify and as methane seeps proliferate. Forests that burn due to heat and drought produce their own carbon sources. But increasing soil respiration, which has also been called the compost bomb, represents what is probably one of the most immediate and likely large sources of carbon feedback.

increase-in-carbon-dioxide-from-soils

(A new study finds that warming of 1 to 2 C by 2050 will increase soil respiration. The result is that between 30 and 55 billion tons of additional CO2 is likely to hit the Earth’s atmosphere over the next 35 years. Image source: Nature.)

And it is also worth noting that the study categorizes its own findings as conservative estimates. That the world could, as an outside risk, see as much as four times the amount of carbon feedback (or as much as 2.7 ppm of CO2 per year) coming from soil if respiration is more efficient and wide-ranging than expected. If a larger portion of the surface soil carbon in newly warmed regions becomes a part of the climate system as microbes activate.

Amplifying Feedbacks Starting to Happen Now

The study notes that it is most likely that about 0.45 parts per million of CO2 per year will be leached from mostly northern soils from the period of 2016 to 2050 under 1 C worth of global warming during the period. To this point, it’s worth noting that the world has already warmed by more than 1 C above preindustrial levels. So this amount of carbon feedback can already be considered locked in. The study finds that if the world continues to warm to 2 C by 2050 — which is likely to happen — then an average of around 0.71 parts per million of CO2 will be leached out of soils by respiration every year through 2050.

rates-of-soil-carbon-loss

(When soils lose carbon, it ends up in the atmosphere. According to a new study, soils around the world are starting to pump carbon dioxide into the atmosphere. This is caused by increased soil respiration as the Earth warms. Over the next 35 years, the amount of carbon dioxide being pumped out by the world’s soils is expected to dramatically increase. How much is determined by how warm the world becomes over the next 35 years. Image source: Nature.)

The upshot of this study is that amplifying carbon feedbacks from the Earth environment are probably starting to happen on a large scale now. And we may be seeing some evidence for this effect during 2016 as rates of atmospheric carbon dioxide accumulation are hitting above 3 parts per million per year for the second year in a row even as global rates of human emissions plateaued.

Beyond the Point of No Return

What this means is that the stakes for cutting human carbon emissions to zero as swiftly as possible just got a whole hell of a lot higher. If we fail to do this, we will easily be on track for 5-7 C or worse warming by the end of this Century. And this level of warming happening so soon and over so short a timeframe is an event that few, if any, current human civilizations are likely to survive. Furthermore, if we are to avoid terribly harmful warming over longer periods, we must not only rapidly transition to renewable energy sources. We must also somehow learn to pull carbon, on net, out of the atmosphere in rather high volumes.

Today, Professor Ivan Janssens of the University of Antwerp noted:

“This study is very important, because the response of soil carbon stocks to the ongoing warming, is one of the largest sources of uncertainty in our climate models. I’m an optimist and still believe that it is not too late, but we urgently need to develop a global economy driven by sustainable energy sources and start using CO2, as a substrate, instead of a waste product. If this happens by 2050, then we can avoid warming above 2C. If not, we will reach a point of no return and will probably exceed 5C.”

In other words, even the optimists at this time think that we are on the cusp of runaway catastrophic global warming. That the time to urgently act is now.

Links:

Quantifying Soil Carbon Losses in Response to Warming

Netherlands Institute of Ecology

Earth Warming to Climate Tipping Point

This is the Most Dangerous Time for Our Planet

Climate Change Escalating So Fast it is Beyond the Point of No Return

NOAA ESRL

Soil Respiration