On “Changes in the Velocity Structure of the Greenland Ice Sheet”

A couple days ago, scientists at the University of Texas at Austin’s Institute for Geophysics published the first map of Greenland ice movement over time, and compared the current rates of ice movement to the historical trend.

Image shows three color-coded maps of Greenland. The first shows the average rate of ice movement over the last 9,000 years with a deep blue vein of almost no movement that runs down the center (roughly) of Greenland with branches towards the edges where Greenland's geology results in slow ice movement. The blue "core" is surrounded by blue-greens fading to yellows and reds at the edges of the island, with some white. This may be where there's not sufficient data to determine average movement speeds (the ice there is probably too recent). The second image is the present-day status of ice movement on Greenland. The deep blue sections are much broader, covering more of Greenland, with a similar (at a glance) distribution of greens and yellows, but much more red around the edges of Greenland, and none of the "no-data" white. The third image shows the difference in movement speed across the parts of Greenland for which we have data going back 9,000 years. In this image, the spectrum is red (meaning faster) to white (neutral) to blue (slower movement than the historical average). Much of Greenland that is colored shows blue, indicating that over all, the ice sheets are moving more slowly now than their average speed over the last 9,000 years. The areas that where white/uncoded in the first image are also uncoded here. The only red is around the edges, near the uncoded areas where the ice is currently moving much faster, based on more recent measurements.

Greenland’s average ice speed over the last nine thousand years (left), its current speed (center) and the difference between them (right). Blues (negative values) signify lower speeds today as compared to the nine-thousand-year average.

Their basic finding is that the current rate of Greenland ice movement is slower than the average rate of the last 9,000 years. This is basically due to differences in Earth’s atmosphere over time:

During the last glacial period, higher rates of atmospheric dust deposition produced softer ice, which flowed more readily than cleaner ice. During most of the Holocene, though, atmospheric dust concentrations were lower, and the less-dusty ice that formed was stiffer, meaning it did not flow or thin so rapidly. Thus, the thickening seen today in the central regions of Greenland is partly a response to changes in ice rheology that occurred thousands of years ago.

Presumably this dust disparity doesn’t include the late 19th century leading into the 20th and 21st centuries.

If you want to look more into the research, you can go to the Science Daily article, or the research report in Science (which is behind a paywall).

This research – like a lot of climate research – can be a bit confusing to non-scientists. If you’ve paid attention to what sundry news sources have had to say about climate change and Greenland ice, you’ve probably gotten the impression that it’s not only melting, it’s also sliding into the ocean faster every year. That’s the impression I had, and it’s the impression the authors of this research had too:

“Like many others, I had in mind the ongoing dramatic retreat and speedup along the edges of the ice sheet, so I’d assumed that the interior was faster now too. But it wasn’t,”

Based on my experience in climate science communication, at some point the community of climate deniers will seize on this (with glee) as “part of a growing collection of evidence that things aren’t actually as the ‘warmists’ would have us believe”. And, to be honest, most advocates for climate action will probably ignore these findings, for the most part, because at first glance it seems like the deniers might have a point.

The problem is that we’re really good at taking “first glances” and really bad at getting the right impression from them, and as with much of science, this merits deeper discussion.

First of all, while the interior of Greenland is moving more slowly than it used to, the outer edges are moving much, much more quickly than they used to, and contributing to sea level rise. It is expected that as the edges of the Greenland ice sheet crumble into the ocean, and as temperatures continue to rise, the interior of the Greenland ice sheet will probably speed up again.

And that brings us to the second point. People of all stripes have a tendency to focus on research that supports the views they already hold, while discounting or ignoring anything that might challenge their beliefs. While they are not alone in doing this, the climate denial movement is particularly adept at it. They will take isolated bits and pieces, behave as though those bits and pieces are all of climate science.

The reality is that as long as greenhouse gas levels continue to rise, the planet’s temperature will also rise. That’s basic thermodynamics. If you increase the insulation around something, without reducing the amount of incoming heat, then it would be physically impossible for it not to warm.

The Earth’s temperature will continue to rise (and that includes both ocean and atmospheric temperatures) because we are continuing to add greenhouse gasses to the climate system. The rise in temperature has already led to rising sea levels and melting ice around the world, including Greenland. Higher temperatures will mean more melting. Again, that’s basic thermodynamics. This research shows that the changes in temperature and greenhouse gasses are not the only factors at work, and that’s good to know; but in the end, these data do not call the laws of thermodynamics into question.

There’s one more thing to mention about the deniers. A large part of their “case” rests on the notion that the scientific establishment is, in fact, suppressing or ignoring any evidence that might challenge the mainstream understanding of Earth’s climate. It’s a seductive message (there’s a reason there are so many conspiracy theorists out there), but one that is without merit. This is a clear example of a scientist going into his research with an expected finding (he thought he’d find accelerating ice movement), getting a result that was the opposite of what he expected, and reporting on it anyway, because for a majority of scientists, that’s just what you do.

Dishonesty is a factor in all human endeavors, and there are many examples of scientists fudging the numbers. It is important to note, however, that those lies are found out, usually by scientists, and that over time the record is corrected. The field of climate science is almost 200 years old, and for a majority of that time, we’ve known the thermal properties of CO2 and other greenhouse gases. We’ve also known that increasing those gases will cause Earth’s temperature to rise. Unless someone manages to produce and support research that undermines those basic facts, there is NO reason to think that Earth’s temperature will do anything other than rise, and keep on rising as long as our greenhouse gas emissions maintain a themal imbalance.

I’ll let Pippa get the last word on this –


In a country that has, for many years, been at the forefront of scientific innovation and technological development, everybody (excepting a few religious fundamentalists) claims to value science, and yet we consistently see policies and behaviors that seem to ignore reality.

So what does it mean to value science? Is it like the lip-service version of “valuing life” that goes along with building the world’s most deadly military? Do we value it at a distance, in a sort of abstract manner?

For my part, I feel that if we value science, then we need to consider how its findings connect to other things we value. Take the current example of Flint, MI. We have known that lead is dangerous for thousands of years, and more recently had a refresher of that lesson with the rise and fall of tetraethyl lead. We know that the Flint River is more corrosive to lead than the lake water coming from Detroit. We also know how to treat water so that it won’t corrode the lead in pipes.

At a minimum, valuing science should mean accepting its findings, and acknowledging what we know about reality, but what then?

Then we get to other values. Most people claim to value human life and wellbeing, so it should be a simple conclusion – either avoid water sources with a low pH, or treat the water to protect the population from lead poisoning. Supposedly, Governor Snyder and his “Emergency Financial Manager” made the choices they did because they value fiscal responsibility.

Before we address the financial aspect of this, let’s dwell on the implications here for a moment. The decision to change water sources and the decision to not treat the water were made in order to save money, and that goal was more important than the wellbeing of the people who would be using the water. That is the best possible explanation. That means that to the people making those decisions, human life and wellbeing is worth less than whatever money they thought they could save.

But let’s set aside, for the moment, the moral outrage of valuing the lives of our fellow humans so little, and consider the supposed reasoning behind this disaster. The idea was to save money. With the information available BEFORE the change was made (years, decades, and in some cases centuries before), no responsible financial calculation could have left out the impacts of widespread lead contamination in Flint.

If life was valued, then they would have taken care to treat the water or not make the switch if they couldn’t afford the treatment.

If fiscal responsibility was valued, then again, treatment or not switching were the best options, given the short-term and long-term costs associated with untreated water.

If science was valued, then that value did not extend beyond mere academic interest, and into any kind of informed action. In that case, I think that were Snyder to claim to value life, fiscal responsibility, or science, he would be demonstrating only that he does not value truth.

In the absence of any honest statement of the values that went into creating this human rights disaster, we are left wondering what was really at work. Whether it was the manifestation of a belief that government is inherently evil (surely a self-fulfilling prophecy from someone with power over government policy), or a desire to transfer wealth (financial or otherwise) from the hands of poor, black folks to the hands of rich, white folks, or any of the other motives suggested, this does not seem like an isolated incident.

The poisoning of Flint, MI parallels many, many other cases of environmental contamination, including the destabilization of Earth’s climate through fossil fuel use. It seems that the values that have lead to decades of obfuscation and inaction surrounding climate science, are the same as the values behind disasters in Flint, the Gulf of Mexico, Los Angeles, Bhopal, and countless other places around the world.

I don’t have a solution, but I think it’s important to state as clearly and as often as possible that the ideological movements behind all these crimes against humanity and against life on this planet are tied together. Without identifying and solving that problem – as well as our own participation and contribution to that ideology – it seems unlikely that we will be able to fix the crises before us, or prevent the new ones that loom on the horizon.

Mass Extinction

Note: This post is relevant

A recent report has garnered some attention for its declaration that we have entered Earth’s sixth Mass Extinction – the first since the disappearance of the dinosaurs. They also state that humans, as a species are at risk of going extinct.

I’ve got lots to say about all this, but right now I want to address how we know what we know.

Most people not involved in the study of plant and animal populations don’t have a very clear idea of how scientists come to conclusions like this. There’s no reason they SHOULD, but having an idea of how we know what we know can act as a defense against those who say things like this are all made up.

When I was in college, I spent one week on some islands in the Bahamas (terrible, I know), studying a population of iguanas. I was part of a group of around 10 people led by a biologist who had been doing this for 20 years. This species only lives on three islands, and was almost extinct when he started studying them.

20 years later, with the help of the Bahamian government, they were doing quite well, and he had a massive amount of information about the iguanas, how long they lived, how many there were, what their breeding habits were, and so on.

This was achieved by spending between two weeks and a month on the islands about once a year.

This same biologist was doing similar studies of turtles in a couple places in Indiana, Nebraska, and probably a couple other places I’m not remembering.

I also spent time in Tanzania, and talked to biologists there who were studying everything from plants to elephants.

I also talked to scientists at the New England Aquarium that monitor fish and sea turtles populations all along the East Coast of the United States.

When I worked for a state department of natural resources, I spent two summers doing similar work to what I had done with the iguanas and turtles, this time with snakes. There were fewer of us studying many more populations, so it took us a full summer to cover about half the significant habitats in the state.

I also did some filing work for that department, going through the records of citizens reporting in about animals they had seen.

Now I regularly interact with people who are doing the same thing with bird species – counting them, weighing them, and monitoring how their populations have been changing for the last 50 years.

I’ve also been talking to people who’ve collected plant and bird records from scientists and hobbyists going back in to the 1800s.

This is just the tangential experience of one person, who studied biology as an undergrad in one college, and worked for a couple science-related organizations afterwards.

In the U.S. alone, there are thousands of colleges and universities that do similar kinds of research at different levels. Every state has an agency that ALSO hires scientists to do research. Every state also has people who closely monitor wildlife for their own reasons – hunters, birdwatchers, reptile enthusiasts, frog enthusiasts, fishermen, and so on.

Many of the colleges I mentioned ALSO do research in other countries all over the world, but all of those countries also have their own researchers and institutions doing their own work.

This work involves individually counting lizards, or snakes, or turtles, or birds, insects, or fish, or mammals, or plants, or sometimes number of flowers ON plants.

On every continent, in every country, in every habitat in all conditions of all seasons, there are thousands of people constantly monitoring the myriad of organisms we share our planet with – and in some cases rely on.

All of these people also share their data, and publish it, and cross-check it, and add it in to common databases that cross international boundaries. All of this work goes back generations, and as the human population has grown, so to has the number of people studying the world we live in, as well as our capacity to do so.

That is how we know that species are going extinct. That is how we know that the climate is changing – because for every person I mentioned who’s studying life on earth, there’s also someone studying the planet’s past, and someone studying the chemical composition of the atmosphere, and someone studying how those chemicals behave in different conditions.

The entire planet is changing all around us, and everybody who’s watching can see it.

Priorities, or: My issue is (not really) more urgent than your issue

I’ve said many times that climate change is different from other topics of activism, because it is, more than anything else, one issue that will affect all other issues. Do you care about war? Climate change will make war more likely. Do you care about “the environment”? Climate change is affecting ever ecosystem on the planet. Do you care about civil rights and social justice? The elevated stresses of food shortage, high temperatures, and economic troubles will exacerbate the kind of tribalism that fuels prejudice. The list goes on.

The problem I find myself facing is that I can’t honestly say that any of these issues are separable – either from each other or from climate change. If there’s a war going on in your area, that is a far more immediate concern than where your energy is coming from, or whether you can work on reducing atmospheric greenhouse gas levels. If you’re struggling to make ends meet, you’re not going to have time, energy, or money to spend on political change, or even on self-education about the complexities of climate science. If you fear for your life every time you see a police car, that’s an issue of immediate and unavoidable importance.

All of these are issues of vital importance. They all matter. They all need to be worked on for their own sakes, AND they all need to be addressed as part of acting on climate change. The problem is that we only have so much energy. There are a few human dynamos out there who manage to be really and truly active in every issue they care about, but for mosts of us, that kind of energy is beyond our grasp. In addition, all of these issues (and many that I haven’t discussed) deserve the full attention of smart, dedicated people, not a fraction of that attention.

And so we are left with a classic conundrum. We can’t address the serious obstacles to climate action without addressing money in politics. We can’t address money in politics without addressing low voter turnout. We can’t address low voter turnout without addressing voter suppression efforts. We can’t address voter suppression efforts without addressing institutional racism, and the chain goes on. I could have made the same series of connections with a dozen issues, and the reality is that NONE of these issues can wait till other things are solved.

Black people will not and should not wait to fight back against the systemic war that has been waged against them in this country since before the American Revolution. Women will not an should not ignore the problems of rape, harassment, and prejudice in our society. Non-heterosexual and non-cisgendered people will not and should not shelve their fight for equality and safety in a system that still allows for them to be treated as less than human. And almost none of the people I just mentioned fall into any one of those categories. The fact that white, cisgendered men like myself are the only group that does NOT have to actively fight for the right to live in peace shows just how important all of these battles are, and how important it is that we help our fellow humans even in struggles that do not directly benefit us.

And action on climate change cannot wait. It has waited for too long. It is now over 50 years since we knew enough to start taking action with confidence that it was the right course. I can think of well over a dozen examples, off the top of my head, of plant and animal species that are changing radically in response to the planet’s rise in temperature, on every continent on the planet. This is happening now, and it has only just begun

So what should those of us who are pouring our energy into climate change be doing about all this? Well, to be honest I don’t know. Not really. But I have an educated guess. In my opinion, the single most important thing we can do is make it easier for others to help out. We can pour our efforts into making it clear what can be done in people’s daily lives. We can work to make the science accessible and understandable for as many people as possible. We can make sure to tell people about ways THEY can take action. We can experiment in our own lives and spread the results of our experiments. We can write letters to politicians and pass them around for other people to sign and send in. We could even do things like writing scripts for those who want to call congresspeople – to get a clear, concise message across.

It’s good to engage in demonstrations, but I fear that our power structure has gotten all too good at shunting such protests to the side, and ignoring them. We have to recognize that climate change, and the actions required to address it, not only represent a challenge to the most profitable industry on the planet, they also represent a challenge to the quasi-religious rule of free market fundamentalism, and the actually religious philosophies that say that God is in control, and that the world will end soon by God’s hand, so none of this matters, or if it does, we should be HELPING bring about the end, so we can all get to our afterlife and enjoy heaven. These ideological forces are much, much harder to fight against than a set of business practices or confusion about climate science, or misinformation about the actions that can be taken. There are entire worldviews that are directly contradictory to the reality of human-made climate change, and those are what stand between us and a better future. And we need to make it as easy as possible for as many people as possible to fight against those ideologies.

A reminder on terminology

This one comes up a lot, so I thought I’d copy and paste a recent answer here. Deniers will often bring up the shift, in news and political media, from talking about “global warming” to talking about “climate change”, as if this was something orchestrated by the political Left, just in the last few years.

Climate change has been a term used in the scientific community since at least the 1930’s, Daniel. It’s been the most common term, used by scientists, since at least the 1960’s.

Global warming was adopted in the popular press because it’s a simpler concept, and it catches attention. The shift to using “climate change” in the popular press and in politics came about because of a memo Frank Luntz sent to the GOP, telling them to use “climate change” because it sounds less scary.

The change in terminology ONLY happened in the popular/political press, and it was a change initially designed to serve the rhetorical purposes of the denial movement.

One hundred years of “I told you so”

Climate scientists have been under attack since before I was born, and those attacks have not lessened one bit as the evidence for man-made climate change has grown clearer and clearer, along with our understanding of just how much danger it presents. When Svante Arrhenius wrote about the influence of CO2 in our atmosphere in the 1890s, it was a hypothesis, grounded in a solid understanding of chemistry and physics, and backed up with calculations that hold true today. A century later, the IPCC second assessment was out, and climate scientists knew with a high degree of certainty that rising CO2 levels were causing the entire planet to warm at an alarming rate.

And the denial movement, funded by companies with a direct interest in continued use of fossil fuels, was in full swing, attacking scientists and their reputations, fostering political polarization around the issue, and pushing the Republican party farther along the path to full-fledged denial of reality. Today, publicly accepting the reality of climate change, as a GOP candidate, is tantamount to political suicide.

This post serves little purpose, except as an outlet for my frustration. According to everything we know, right now, we are facing conditions of the kind that have spelled doom for countless species in eons gone by. Beyond that, it has been clear for a long, long time that climate change will be one of the biggest drivers of war in the 21st century. More drought, more floods, higher seas, and more heat waves will all lead to food shortages, refugees, desperation, and chaos. It’s not hard to figure out why the Pentagon is worried.

And yet we still have people saying, with each disaster, and each new war, or new atrocity, “now is not the time.”

Here’s the thing – they’re right.

The time was before I was born. The time was 1996. The time was any time in the last fifty years. The time was before it was too late to stop the planet from warming. It’s long past time to be talking about climate change. Right now what we should be doing is taking action.

For the rest of this century, there will always be a disaster ongoing. Always. For the rest of this century, there will always be a crisis in urgent need of our attention. The predicted threats to national security, to economic stability, to human existence – they are beginning to become a reality, and will only get worse for the rest of my life.

This problem should have been handled. It could have been handled before I became aware of it. But instead, over 100 years after the first calculations of CO2’s relationship to planetary temperature, I’m finding myself in the position of saying “we told you so.” I’m too young for that. My generation should not have had enough time with this problem unsolved to say that. But for the rest of my life, and the lives of everybody else on this planet today, “we told you so” will be a refrain. And if anybody dares to say “now is not the time”, we can tell them, “you’re damned right, so why are we still talking about this? Why aren’t we DOING something?”

After We Win: Sewage Power

Very often discussions about renewable energy focus on solar and wind power, and other sources fall into the background. To be sure, these two will form a significant part of the new system, but they are not all there is. Aside from geothermal energy, tidal energy, and various forms of crop-based biofuels, we also have an abundant form of energy available that is directly proportional to the number of people living nearby.


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