Obama and Trudeau want to protect the Arctic against climate change and harmful development (Pic: I.Quaile

Sometimes there are pleasant surprises to end the week. An announcement by the US and Canadian leaders that they are joining forces to take measures to protect the Arctic would come into that category.

Given the US role as a top emitter and Canada’s extremely negative position on climate action under the old Harper government, this seems to me a very important announcement. Obama, unfortunately, is on his way out. Trudeau, we know, has just come in.

I was interviewing Frida Bengtsson from Greenpeace on the phone this morning about a campaign to keep industrial fishing out of the Arctic. I asked her how she judged the announcement. This was her response:

“I think it shows some good, clear leadership on Arctic protection. Now it’s up to the implementation. We’re hoping they will set the bar really high on protection and that fishing will be included and that areas of the Arctic will be off limits to any industrial activity, including oil and gas.”

As always, the proof of the pudding is in the eating.

Keeping a wary eye on the politicians (Pic: I.Quaile)

In the background, the two countries have pledged to sign the Paris climate deal “as soon as feasible”. Hm. That sounds a little wishy-washy to me. But they also say they want to improve cooperation on energy issues. If it means cutting emissions rather than building something like the Keystone XL crude oil pipeline to bring heavy Canadian oil to the US, it’s extremely good news for the climate. Obama rejected the project last year. It was promoted by Trudeau’s predecessor, Stephen Harper.

Canada and the USA have now committed to cut emissions of methane by 40 to 50 percent below 2012 levels by 2025. Given that methane is around 20 times more powerful than CO2 as a greenhouse gas, that is an important step. The oil and gas industry is the single largest source of methane emissions in the US and globally. Obama and Trudeau also announced they plan steps to fight climate change in the Arctic, and to speed development of green technologies.

The US Environmental Protection Agency, EPA is to start developing regulations for methane emissions from existing oil and gas sources immediately and “move as expeditiously as possible to complete this process”. Obama has made extensive use of the EPA during his time in office, in his attempt to combat opposition to his pro-environment and climate moves from Republicans.

Last month the US Supreme Court ruled to delay the implementation of Obama’s Clean Power Plan to fight emissions from power plants. But the President says the plan to cut methane emissions is on secure legal grounds.

In the Arctic, the countries agreed to set standards on shipping, fishing and oil and gas exploration and development, and to base decisions on scientific evidence. Development is only to occur “when the highest safety and environmental standards are met”.

In the Washington Post, mark Brownstein, vice president of climate and energy at the Environmental Defense Fund, said the proposed cut in methane emissions would be like “closing a third of the world’s coal plants”.

“This is arguably the single biggest, most impactful, most immediate thing we can do to slow the rate of warming right now”, Brownstein said.

Obama and Trudeau pledged to safeguard the Arctic with initiatives to protect more than 10 percent of the marine areas, designate shipping corridors with low environmental impact, and establish new offshore oil and gas leasing plans.

Clearly, both governments are recognizing the Arctic as a priority. Of course full Arctic protection requires action by other Arctic nations, like Russia, Denmark and Norway.

Shipping is risky in the cold, dark, Arctic (Pic: I.Quaile)

Increasing industrial activity in the Arctic brings an increased risk of potential collisions, oil spills, pollution, black carbon and underwater noise to disturb wildlife.

This joint announcement is a clear demonstration of how much political leadership can do when it comes to climate issues,and just how important is to have people in power who understand what drives climate change and why it is dangerous, and are willing to commit to climate action in the face of opposition from fossil-fuel-based industries, demonstrating at the same time that climate protection is actually good for the economy.

I interviewed Alexander Ochs, Senior Director for Climate and Energy at the Worldwatch Institute recently about implementing the Paris Agreement and the “Energiewende”, the transition to renewable energy. We also discussed the US position on climate.

“If we talk about the US, there is not one US player. Unlike many other countries where there is a consensus across parties, across people of different ideologies, that does not exist in the US, it’s a highly partisan issue. Candidates for presidency and US congress take positions almost exactly along party lines.”

Clearly, the result of the US presidential election will have major implications for climate action.

“The results of the elections on the federal level, as well as their impact on international cooperation on climate and energy, will be very dramatic. Having said that, even under Republican leadership, – which would have dramatic impacts – there will be many actors in the United States that will continue their action on the ground. Whether it’s municipalities or cities –more than a thousand mayors are supporting the Kyoto goals for example, widely unnoticed by Europeans – or on the state level, or individuals. So you do see a lot of things happening on the ground in the United States, so it’s often unfair to these people if we reduce the US to the presidency.”

That is an encouraging thought. Leadership is essential. But so, too, is action from the bottom up.

Ice on the melt  (Photo: I Quaile)

Here in Germany, the winter has seemed strange enough. We had flowers in bloom at Christmas, and people sneezing with pollen allergies. Overall it was extremely mild. Now we are just having the odd flurry of sleet, with the magnolias getting ready to bloom and much of nature said to be three weeks ahead of schedule. But that is nothing compared to what’s been going on in the Arctic.

This poppy was growing near my home at Christmas. (Pic: I.Quaile)

“The Old Normal is Gone”, is the headline of a piece on Slate by Eric Holthaus, sub-headed “February Shatters Global Temperature Records”. He says the record warmth is so dramatic he is prepared to comment using unofficial data, before the official data comes out mid-March. February 2016, he says was probably somewhere between 1.15 and 1.4 degrees Celsius warmer than the long-term average, and about 0.2 degrees above last month, which was itself a record-breaker. This, Holthaus calculates, means while it took us from the start of industrialization until last October to reach the first 1 degree C. of warming, we have now gone up an extra 0.4 degrees in just five months. Paris target 1.5 degrees maximum – here we come!

In the Arctic, this is particularly dramatic. Parts of the Arctic were more than 16 degrees Celsius warmer than “normal” for the month of February, which, Holthaus says, is more like June temperatures, although it would normally be the coldest month.

Melting ice off Svalbard (Pic I.Quaile)

Svalbard, one of my favourite icy places, has averaged 10 degrees Celsius above normal this winter, with temperatures rising above the freezing mark on nearly two dozen days since December first.

Correspondingly, the Arctic sea ice has reached a record low maximum. Lars Fischer, writing in the German publication Spektrum der Wissenschaft, notes that January already saw the smallest ice growth of the last ten years. In mid-February, he writes, satellite data showed the ice cover in some parts of the high north was almost a quarter of a million square kilometers less than ever before on this date. This lasted two weeks, than the ice grew a little last week, to draw equal with the previous all time low for a first of March. New ice will be much thinner than the old multi-year ice, a trend that has been increasing.

New satellite data

Researchers are using a new technique to gain data about the thinning ice pack in real time. An article in Nature, “Speedier Arctic data as warm winter shrinks sea ice”, describes a new tool to track changes as they happen and provide near real time estimates of ice thickness from the European Space Agency’s CryoSat-2 satellite. Previously, there was a time lag of at least a month.

Satellite data is revolutionizing what we know about the Arctic ice. The news is not good. (Pic. I.Quaile, Tromso)

Natural fluctuation, el Nino or human-made climate change?

Of course there are those who say fluctuation is natural in the Arctic. But this year, this fluctuation is extreme. Some researchers say the melt season started a whole month too early. Certainly, at this time, the Arctic should be in the grip of winter.

Fischer titles his article “Absurd winter in the Arctic”. I’m not sure absurd is the best way of describing it. (It could actually seem quite logical if you look at the extent of extra warmth we have been creating with our greenhouse gas emissions). Looking at an article in the Independent by Geoffrey Lean, I see the term “absurdly warm”comes from the NSIDC, National Snow and Ice Data Centre in Boulder, Colorado. The “strangest ever” and “off the chart” are used by NSIDC director Mark Serreze and NOOA respectively. Those figure.

In December 2015, the high Arctic experienced a heatwave. We saw temperatures near the North Pole going above freezing point. January was the warmest month since the beginning of weather data. In February, parts of the Arctic were more than ten degrees warmer than the long-term average.

The Arctic Oscillation is partly to blame. It is currently such that warm air can make its way north. Strong Atlantic storms have been pressing the warm, moist air north into the High Arctic. But surely there can be no doubt that our human-made climate warming is playing a major role in all this?

It remains to be seen how the situation will develop as the spring sets in. Fisher notes that the last winter ice maximum extent was very low, but was not followed by a new record low in summer.

Eric Holthaus notes that although we are experiencing a record-setting El Nino, which “tends to boost global temperatures for as much as six or eight months beyond its wintertime peak”, this alone cannot be responsible for the temperature records.

He quotes scientific studies indicating that El Nino’s influence on global temperatures as a whole is likely small, and that its influence on the Arctic still isn’t well known.

“So what’s actually happening now is the liberation of nearly two decades’ worth of global warming energy that’s been stored in the oceans since the last major El Nino in 1998”, he writes.

Soon no longer just fiction? (I.Quaile, Alaska)

“The old normal is gone”

Whatever the cause – this record warmth is a major event in our climate system. Holthaus quotes Peter Gleick, a climate scientist at the Pacific Institute in Oakland, California in his article title: “The old normal is gone”. “The old assumptions about what was normal are being tossed out the window”.

“We could now be right in the heart of a decade or more surge in global warming that could kick off a series of tipping points with far-reaching implications”, says Holthaus. Where have I heard this before?

Lean, in the independent, says two new studies by the Woods Hole Research Center in Massachusetts give new evidence of self-reinforcing feedback mechanisms. This is not new. How much more evidence do we need? Permafrost thaws, resulting in emissions of methane and CO2 from the soil. Melting ice means the reflective white surface is replaced by dark water, which absorbs heat.

So what are we doing about it? In interviews with experts from NGOs including Earthwatch and Germanwatch recently, various experts have been confirming my own feeling that the Paris Climate Agreement may have been a milestone, but not necessarily a turning point – unless climate action is taken very quickly.

I would like to be optimistic. But there is so much evidence suggesting that whatever we do, it is likely to come too late to save the Arctic as we know – knew – it for coming generations. Come on world, prove me wrong! Please!

Melting ice off Greenland (Pic: I.Quaile)

My attention was caught this week by a study that ascertained that thermal expansion accounts for a much greater share of sea level rise than previously thought. In fact, quite a few journalists got the message wrong. They thought the researchers had found that climate change was causing sea level rise twice as high as previously thought, which would have been quite a sensation. In fact, what the scientists actually found was that the amount of sea level rise that comes from the oceans warming and expanding has been underestimated and is probably about twice as much as previously calculated. There is a clear difference, which does not make the research – using the latest available satellite data – any less interesting.

Since two of the authors of the study are based here in Bonn, I was able to drop in on them and get them to explain their findings and the implications for our Living Planet programme. That will be broadcast in the near future. I also talked to Professor Anders Levermann from the Potsdam Institute for Climate Impact research on the phone, to get the research findings into context.

While physicists understand the workings of thermal expansion in the oceans in general, Levermann told me there is still a lot to learn about how the heat from excess warming is transported in the ocean, which is of key importance to understanding sea level rise, amongst other things. He says the new research will help make models of future sea level rise more accurate.

Roelof Riebroek and Jürgen Kusche, University of Bonn (Pic: I.Quaile)

The Bonn researchers explained to me how satellite technology has made huge improvements in the collection of data, especially relating to the very deep areas of the ocean, which are very difficult to reach with conventional measuring gauges. Professor Kusche told me he would like to see the results of the study, published in the Proceedings of the National Academy of Sciences, being used by governments and coastal planners, as sea level rise will affect a large number of people living in coastal areas in the not-too-distant future. Warming seas are also linked to the occurence of storms, making the findings doubly relevant to those involved in protecting coastal areas.

From an Iceblogger point of view, I was keen to know whether the knowledge about the amount of sea level rise ascribed to  thermal expansion had any implications for the role played by melting ice in raising sea level. If thermal expansion is accounting for a higher share of the sea level rise, is melting ice from Greenland and Antarctica accounting for less? I put that question first to Professor Kusche.

“We think that less of the sea level rise is coming from melting ice and glaciers, that’s actually true,” he answered. He said he and his colleagues had done a very thorough re-analysis of all the measurements available over the last 12 or 13 years, “and we are pretty sure that our numbers are correct”.

Rietbroek came in that that point: “Less, but not that much less. If you look at pubished literature and estimates of glacier melting, and try to add those up, you won’t be that far away from what we get. So the melting of glaciers is not that different from what’s been found previously”, he added.

Climate change melts ice – from above and below(Pic:I.Quaile)

I put the same question to Professor Levermann from PIK, who runs an ice sheet model for the Antarctic and was lead author of the IPCC chapter on sea level change. He explained to me that the various contributions to sea level rise are measured and modelled separately by different teams of experts in particular fields. The models all have a wide range of possible variation. He told me there is still some uncertainty in the distribution of the “sea level rise budget” between thermal expansion, ice sheet melt, mountain glacier melt and groundwater mining. While the latest findings on thermal expansion could potentially shift the relative contributions and are important for improving models to project future sea level rise more accurately, they do not change the validity of predictions relating to the amount of ice going into the ocean.

Ultimately, Levermann says, one of the IPCC statements with the highest certainty is that sea level will continue to rise for centuries to come. He was one of the authors of yet another study  published in Nature Climate Change this past week, led by Peter Clark from the Oregon State University. It affirms that our greenhouse gas emissions today produce climate change commitments for many centuries to millenia. Unless the Paris climate agreement is put into practice asap and we reach zero or negative emissions, up to 20 percent of the world’s population will find itself living in areas that may have to be abandoned.

We are, indeed, living in the Anthropocene. Recently, I interviewed a scientist who found that we have already postponed the next ice age by 50,000 years through our fossil fuel emissions. The latest sea level study indicates that the next few decades offer a brief window of opportunity to avoid increased ice loss from Antarctica and “large-scale and potentially catastrophic climate change that will extend longer than the entire history of human civilization thus far”.

Heavy snow – not all fun (Pic: I.Quaile)

If you are sitting somewhere on the East Coast of the USA, struggling to cope with 30 inches of snow, you might be forgiven for reacting with relief to a report released by the Potsdam Institute for Climate Impact Research (PIK) indicating human-made climate change is suppressing the next ice age. With a wink in your eye, you might be very grateful that these extreme conditions are only going to last for a few days and not become the everyday normality of a new ice age.

There are those (but increasingly few of them) who might even thank the fossil fuels industries for averting a scenario like “The Day after Tomorrow” and ensuring that the relatively comfortable interglacial in which we live is likely to continue for the next 100,000 years. That is the conclusion of the study published in the scientific journal Nature.

The problem is that postponing an ice-age illustrates that human interference with natural climate cycles over a relatively short time has the potential to change the world for a hundred thousand years to come, with all the problems that come with it. And given that the increase in extreme weather events like the US snowstorm is highly probably related to anthropogenic climate change, perhaps an ice age in 50,000 years would be the lesser evil.

Burn fossil fuels, suppress the ice age

Using complex models to try to find out which factors influenced the last eight glacial cycles in earth history and what is likely to lie ahead of us, the scientists found that as well as astronomical factors like the earth’s position in relation to the sun in different stages of its orbit, the CO2 concentration in the atmosphere is a key factor.

I talked to physicist and earth systems modeler Andrey Ganopolski, lead author of the study to find out more about the research and the background.

Listen to the interview.

Ganopolski is a physicist and climate modeler. (Pic: PIK)

According to Milankovich’s theory, a new ice age should occur when the earth is far away from the sun and summer is colder than usual in the northern hemisphere, at high latitudes in Canada and northern Europe. These are the areas where big ice sheets can grow. At the moment, Ganopolski explained, we have a situation where our summer occurs when the earth is far from the sun. So in principle, we have the conditions when a new ice age can potentially start. He and his colleagues wanted to understand why we are not living in an ice age when astronomically, the conditions are just right to move towards a new ice age.

Meddling with the planet

They come to the conclusion that naturally, without any anthropogenic influence, we would expect the new ice age to start around 50,000 years from now. That would mean that this interglacial, the Holocene, in which we live now, would already be unusually long. In the past, an interglacial lasted only 10 or 20,000 years, but this one is expected to last for 60,000 years.

Greenhouse gas emissions are transforming all areas of the planet. (Pic: I.Quaile)

But our emissions of greenhouse gases are postponing this even further. Relatively large anthropogenic greenhouse gas emissions – say two to three times what we already emitted – would, according to the scientists’ model, additionally postpone the next ice age, so that it would only start 100, 000 years from now, so we would completely skip one glacial cycle, which never happened in the last three million years.

Humankind as a geological force

Now regardless of whether you are a fan of ice and snow or one of those who say they can happily live without any more ice ages, the study’s findings illustrate just how long anthropogenic influence on climate will continue. Humanity, it seems, has become a geological force that is able to suppress the beginning of the next ice age, according to the PIK experts. Human behavior is changing the natural cycles that have shaped the global environment and human evolution.

Over the last 3 million years, glacial cycles were more or less regular. Most of the evolution of humans occurred during those last three million years. Ganopolski says humans can be seen as a kind of product of glacial cycles, because the conditions were probably right to increase the size of our brain, because we had to be clever to survive in such a variable climate.

Melting ice, north and south? (Photo: I Quaile)

Who cares?

But given that it is easier and pleasanter to live in non ice-age conditions, there is still an understandable tendency to respond to the ice-age-postponement announcement with: “so what?”

Ganopolski argues one reason the study is significant is that it does away with the arguments of some climate skeptics who have argued that warming the atmosphere by burning fossil fuels is not a bad thing, because it could avert an “imminent” ice age (a theory first made popular around thirty years ago, he says). Since the research indicates there is none on the horizon for more than 50,000 years anyway, this is nonsense, says Ganopolski.

But the main reason the research findings deserve attention, he says, is that they show we can affect the climate for up to a hundred thousand years. He believes a lot of people think if we stop using fossil fuels tomorrow or the day after, everything will be fine. In fact, anthropogenic carbon dioxide will stay in the atmosphere for an extremely long time. “That means we are affecting earth’s future on a geological time scale”, he says.

Whether the next ice age comes in 50,000 or 100,000 years may seem irrelevant to a lot of people, faced with the concerns of life today. But the effects of our warming the globe are already being felt and will have considerable implications well before that, Ganopolski reminds us. He says the new study just shows how massive our interference with the earth’s systems is, and backs up the need to take action now to cut greenhouse gas emissions.

Rising CO2 emissions are influencing glacial patterns (Measuring station on Svalbard, Pic. I. Quaile)

Greenland and Antarctic in the Anthropocene

He mentions the research also deals with Greenland and Antarctica:

“What we show is that even with the CO2 concentration we have already, we can expect that a substantial fraction of these ice sheets will melt. So obviously, in this respect, any further increase of CO2 will have even more negative effects”.

Sea level rise, ocean acidification, changing food supplies, floods, droughts…and, yes, even more of those extreme blizzards, fuelled, paradoxically, by warming seas…maybe there is more to this delaying the ice age business than first seemed.

So are we living in the “Anthropocene”, i.e. an era in which not nature but humankind is determining the shape of the world we live in now and for centuries to come? Ganopolski and his colleagues say yes. He stresses what we are doing to the climate and the speed at which it is happening represent unprecedented, substantial deviation from the natural course of things.

“So if you continue to emit a substantial amount of carbon dioxide, the Anthropocene will last for hundreds of thousands of years, before systems return to anything like “normal” conditions”, he says.

Another  study published in Nature  today provides further evidence that human intervention is responsible for the annual heat records that have been in the news so often recently they run the risk of losing their news value. Ganopolski’s PIK colleague Stefan Rahmstorf, one of the authors, says the heat records, with 13 of the last 15 years the warmest since records began, can no longer be explained by natural climate variation. But they can be explained by human-induced climate change.

But is there any point in making potentially uncomfortable changes to the way we live today if we have already changed the atmosphere so massively, for such a long time to come? Ganopolski stresses the extent and speed of the changes and impacts are no grounds for resignation:

“There is no justification for making the climate even warmer than it is. It is a matter of how much CO2 we will emit into the atmosphere. Basically, it will affect all generations, and if we care about them, we should stop using fossil fuel as soon as possible.”

Sounds sensible to me.

Greenland’s massive ice sheet is melting ever-faster. (Pic: I.Quaile)

As 2015 draws to a close, the NOAA report card on the state of the Arctic and a substantial new study on the Greenland ice sheet belie the myth that the Paris climate conference has put us on track for averting the worst climate change impacts. NOAA confirms that the Arctic experienced record air temperatures and a new low in peak ice extent during 2015, and the scientists warn that climate change is having “profound effects” on the entire marine ecosystem and the indigenous communities that rely on it.