Science – Page 73 – a sibilant intake of breath

A few Canadian climate news items

The last couple of days have been an active period in Canadian climate science and policy:

An expedition led by David Barber concluded that the Arctic is likely to be ice-free in the summer, as of 2015.
Environment Canada scientist Don MacIver resigned from the group organizing the next World Climate Congress after the federal government revoked his permission to attend and speak at the ongoing United Nations Framework Convention on Climate Change (UNFCCC) meeting in Poznan, Poland.
Gordon McBean, a prominent Canadian climate scientist, speculated that Environment Canada is not “functioning in a way that is conducive to providing the kind of leadership that we need.”
Chief Phil Fontaine told Indian Affairs Minister Chuck Strahl that: “The actions of Canada in Poland are designed to undermine the rights of indigenous people here and elsewhere.”

Certainly, Canada’s negotiating position has been a problematic one. Many people have pointed out the disjunction between demanding binding emissions reductions from ‘all major emitters’ (including India and China) and stating that Canada has no intention of meeting the target it chose for itself under the Kyoto Protocol.

It is very hard to say that any Canadian government has played a constructive role in the development of international climate policy. Hopefully, that will begin to change as we are dragged reluctantly into the mainstream.

Extreme environmental recklessness

As a metaphor for better understanding the relationship between humanity and nature, some people have used the image of a lifeboat. A more appropriate one is that of a submarine. It captures the complexity of our surroundings, as well as the real danger that messing around with critical systems in an unenlightened way will have dire consequences. Right now, humanity is in the process of setting fires that test the air filtration capabilities of the machine, altering the gas mixture in ways likely to produce unexpected results, and banging away at the outer hull with wrenches, based on the unthinking assumption that our ignorant pounding won’t produce critical leaks.

When one looks at the state of our resource, pollution, and climate policies and actions, one is left with little hope that the future will be a long or pleasant one for humanity. This is not a matter of protecting endangered species or pristine areas of forest; it is about not compromising the basic physical and biological systems that provide the fundamental requirements of human prosperity and existence.

Telephone call authentication

The telephone pranking of Sarah Palin by Montreal DJs demonstrates one kind of failure in the authentication of the origin of telephone calls to powerful people. The other kind of failure was demonstrated when American Congresswoman Ileana Ros-Lehtinen hung up on President-Elect Obama, believing herself to be the victim of a similar prank.

A much more disturbing example was the threatening phone call made to Pakistani President Asif Ali Zardari, supposedly from India’s foreign minister. The call resulted in Pakistani forces being put on high alert – an action that could easily have provoked counter-responses and escalation on the Indian side.

Authenticating the origin of phone calls would appear to be a challenging business. Being able to rapidly and accurately assess whether a call is genuine could prove extremely important, and yet those two goals are at odds. The more rapidly a decision must be made, the greater the possibility of error. Similarly, the greater the security of the system, the higher the chance a genuine call will be rejected as a fake. For instance, two callers that agreed on a list of passwords with which they could authenticate future calls might find themselves unable to demonstrate their identities in situations where they temporarily did not have access to the list.

Obama’s energy secretary

President-elect Barack Obama’s choice for energy secretary seems impressive: Nobel laureate Steven Chu. He is an experimental physicist, so he will be able to separate scientifically accurate information from bunk. He is also an advocate of alternative and renewable energy.

Since 2004, he was the head of the Lawrence Berkeley National Laboratory and concentrated his efforts on climate change. Hopefully, the choice reflects a commitment to addressing climate change, despite all the immediate clamour and apparent urgency of economic policy-making.

On an odd side note, about two thirds of the budget of the US Department of Energy is spent on nuclear weapons research and maintenance.

Leadership on climate, viewed in retrospect

A quotation from Joseph Romm highlights the differences between current and future perceptions of leadership quality:

Future historians will inevitably judge all 21st century presidents as failures if the world doesn’t stop catastrophic global warming.

Certainly, future generations forced to endure catastrophic climate change will consider their ancestors to have failed, whether they focus the blame on political leaders or others. I doubt the leaders of the 21st or late 20th century will be able to escape severe condemnation in a world that experiences mean temperature increases of 5°C or more, loses all its glaciers and sea ice, and experiences multi-metre increases in sea level.

Unfortunately, political leaders are conditioned to be a lot more concerned about the judgment of their voters at their next election (or of their generals, the next time the possibility of a coup is raised). The consequences of that may ultimately prove horrifically damaging.

A global response to the threat of asteroids

Climate change is not the only threat to humanity that the United Nations has been called upon to deal with. Another risk that bears consideration is that of the inevitable collisions that will occur between our planet and other big rocks in space. A group called The Association of Space Explorers has raised the issue recently, arguing that the near pass of Asteroid 99942 Apophis in 2036 should prompt some coordinated global thinking on appropriate responses to possible impacts. Their report refers the the Tunguska event of 1908, a three to five megatonne explosion which started fires large enough to engulf New York City. Apophis has a 1-in-45,000 chance of striking the Earth, but would generate a 500 megatonne blast if it did so. On an astronomical timeline, it is inevitable that an object of this magnitude will eventually strike the Earth.

The group has released a fifty page report entitled Asteroid Threats: A Call for Global Response (PDF). It covers both some technological options for deflecting incoming asteroids and decision-making processes through which such plans could be put into action. It makes a strong case that the probability of successful deflection is much higher if action is taken early. An extension of that is the need to take decisions before it is certain a collision will occur: a situation that significantly increases the probability that such a decision will need to be made within the foreseeable future.

Rapid ocean acidification in the Pacific Northwest

Ocean acidification is one of the wildcard elements of climate change. While both global warming and more acidic oceans are the result of increased carbon dioxide (CO2) concentrations in the atmosphere, the mechanisms are completely independent. The warming occurs because CO2 absorbs some of the long-wave infrared radiation the Earth would otherwise broadcast out into space. The retention of that energy within the atmosphere warms the planet. Acidification occurs because more CO2 in the atmosphere causes increased hydrogen ion concentration in seawater. Both issues would be addressed through stopping net carbon dioxide emissions. In both cases, the magnitude and pacing of future harm is far from certain, even as a function of future emissions timelines.

New research by Professor Timothy Wootton of the University of Chicago has shown that acidification in the Pacific Northwest is taking place much more rapidly than expected; measurements taken off the coast of Washington state show that pH is falling 10 to 20 times faster than projected. One explanation for the discrepancy is the failure of previous models to take into account the effects of biological organisms. The research has also demonstrated that the effects of changes in pH on marine organisms are more pronounced than anticipated.

Compared to terrestrial life, scientific knowledge about the sea is very rudimentary in places. As a consequence, there is good reason to worry about important and unexpected changes arising because of our increasingly acidic oceans. This is all the more reason to keep the carbon that is so densely packed into coal and oil in the ground, rather than allowing it to be released into the atmosphere from our smokestacks, jet engines, and tailpipes.

Dealing with the oil sands is not enough

An intelligent article in The Calgary Herald makes the case that dealing with the oil sands is not a sufficient Canadian contribution to climate change mitigation. Firstly, this is because they represent a small fraction of total Canadian emissions and, even in the worst-case projections, are still a minority of emissions in a few decades. Secondly, it is because technologies developed to de-carbonize the oil sands are likely to be less generally applicable than those created for more widespread industrial activities. Thirdly, it is because many of the emissions associated with the oil sands occur wherever the fuels being produced are burned, rather than at the point of production, where they might be captured.The second point is an interesting one, and the overall case is strong:

The oilsands now produce about four per cent of Canada’s emissions; if production were to triple with no change in technology and all other emissions stopped growing, they could be as high as 10 to 15 per cent around 2025.

This is a big number, and it’s going in the wrong direction since if we want to avoid dangerous climate change, we should be driving our emissions to zero sometime soon after 2050. However, even if we shut down all oilsands operations tomorrow, Canada would still be one of the top greenhouse gas emitters’ per capita in the world. Fixing the oilsands will not get us off the hook.

While I think the authors are somewhat overconfident in the applicability of carbon capture and storage (CCS), they are right to say that dealing with the oil sands must be only one part of Canada’s overall climate change strategy.

In addition, we need to prevent the construction of new coal power plants (at the very least, those without effective CCS) and phase out those that already exist. We need to seek and exploit mitigation opportunities in all sectors – from agriculture to transport to heavy industry – with the ultimate goal of carbon neutrality. One important mechanism for creating the right incentives for lowest-cost across-the-board reductions is putting a price on carbon. That is not, however, sufficient to address all the externalities relating to climate change. Government also needs to work to improve standards and build intelligent infrastructure, supporting the choices that will lead to the emergence of a low-carbon society.

Alcoholic analogies to climate change

Two critical aspects of the problem of climate change can be well understood by means of alcohol-based analogy: the time lag between emissions and climatic consequences and the one-off nature of our decisions.

The last few decades have seen a surge in global greenhouse gas emissions. Due to lags in the climate system, the effects of those gasses are not yet felt, whether in terms of temperature or other climatic phenomena. It is as though we have started doing shots of vodka every thirty seconds. Even after the tenth shot, it is entirely possible that you are feeling lucid. You can talk, walk around, and drink more vodka. If you keep drinking at such a rapid pace until the point where you really feel the effects of the first shots, you have a whole mass of additional (and probably rather unpleasant) impacts still to come.

The reason this is so dangerous is that we only get one chance to decide when to stop drinking. Most people probably have a few experiences of youthful exuberance and realize they need to take into account the anticipated consequences of drinks, rather than just keep drinking until they cannot do so any longer. There is scope to learn from experience. As with global thermonuclear war, climate change offers no opportunities to learn by experience. We have one planet and, by extension, one timeline for greenhouse gas emissions and their atmospheric concentrations. If we are going to stop before we go too far, we are going to need the wisdom to anticipate consequences (as the IPCC and other scientific bodies have already done) as well as the will and good judgment to heed that advice.

The final issue to bear in mind is that of where the costs fall. The danger of drinking yourself to death is one that each individual engages with directly. By contrast, most of the dangers associated with climate change are inadvertently borne by those in future generations. Continuing to emit greenhouse gasses is thus somewhat equivalent to drinking while pregnant. While some of the health consequences might be borne by the drinker, most will be borne by the next generation and, in turn, by those who follow.

There are actually a couple of additional valid ways in which this analogy can be extended. One is to appreciating the difference between stocks and flows. Cutting annual emissions is like reducing how much vodka is in each shot. When emissions are rising, each shot is bigger. When emissions are falling, successive shots are smaller. Nonetheless, even small shots still increase your blood alcohol level. Right now, rising global emissions mean the planet is downing a bigger shot of greenhouse gasses every year. Stopping that growth is the first step, but it is no more of an adequate response in the long term than capping the size of the shots being taken at regular intervals.

A related extension has to do with carbon sinks. In this analogy, they are akin to your liver. They can absorb a certain quantity of greenhouse gasses before they fail. After that point, the further climatic effects of emissions are unmitigated. In the period when your liver is still functional, you can still drink small shots every thirty seconds. Eventually, however, you need to cut your intake/emissions to zero, before your liver/sinks fail.

Meeting in Poland, while the Amazon burns

Satellite images show that 11,968 square kilometres of the Amazon rainforest have been destroyed this year, 4% more than last year. The amount of carbon dioxide released when these forests are cut and burned is colossal. Indeed, reducing the destruction of tropical forest is probably the single cheapest way to reduce the rate at which greenhouse gasses are accumulating in the environment.

Hopefully, the delegates at the ongoing United Nations Framework Convention on Climate Change (UNFCCC) meeting in Poznan, Poland will be able to make some progress on reducing deforestation. While higher cost mitigation will certainly need to take place, picking the low-hanging fruit could be a good way to make a difference relatively rapidly. That is especially important given the importance of the timing of emissions. The more steeply concentrations rise, the less time there is for any adaptation measures to be put in place. The risks of crossing critical climatic thresholds are also increased.