All posts by Garry Peterson

Prof. of Environmental science at Stockholm Resilience Centre at Stockholm University in Sweden.

Mental models and climate change

On Ecotrust’s People and Place, Howard Silverman articulates how climate change demonstrates how the earth has become a social-ecological systems, in which facts and values are entangled, and the future is full of various flavours of uncertainty.  These concepts lurk beneath many climate change discussions.  While none of these mental models are new, he suggests their reality is clarified by climate change in What We Talk about When We Talk about Climate:

Humans exist within social-ecological systems.The climate story is one of processes and connections. Critical planetary systems – climate, nitrogen, biodiversity – are impaired by human activities (see Rockström et al.). Both the power of human influence on natural systems and the vulnerability of human dependence on natural systems inspire awe – and, for some, doubt.

Uncertainties are central to social-ecological experience.
Impairments of planetary systems are historical experiments that are run but once. In linked social-ecological systems, knowledge is probabilistic. A very high confidence characterizes the analysis of human impact on the climate system, according to the typologies of uncertainty and confidence developed by the Intergovernmental Panel on Climate Change (see IPCC – pdf). Uncertainty becomes central (see Post-Normal Science). The more the climate is changed, the less confident we can be about how it might further change (see Easterbrook).

Knowledge of facts presupposes knowledge of values.
The very-high-confidence fact of human impact on the climate system is not prescriptive in and of itself. To derive knowledge, to gain a capacity for effective action, depends on competing and complimentary values and perceptions, including: worldviews of nature as benign, tolerant and/or ephemeral (see cultural theory); aspirations of economic growth and/or human development; senses of personal and/or collective identity (see identity tree); and awareness of agency, i.e. that one has free will, that one can be effective, that risks can be recognized and evaluated.

In another post on cultural theory (the Douglas and Thompson version) Silverman expands on climate and cultural theory:

With positions on climate hardening, references to contradictory worldviews are popping up in the mainstream media (See NYT and NPR), but the story itself is hardly new.  “Underlying much of the energy debate is a tacit, implicit divergence on what the energy problem ‘really’ is,” wrote Amory Lovins in 1977’s Soft Energy Paths. “Public discourse suffers because our society has mechanisms only for resolving conflicting interests, not conflicting views of reality, so we seldom notice that these perceptions differ markedly.”

Here is a cultural theory-based interpretation of climate worldviews:

  • The hierarchist’s story (nature perverse/tolerant): International protocols and national commitments are needed to address the tragedy of the atmospheric commons and reduce greenhouse gas emissions.
  • The egalitarian’s story (nature ephemeral): The underlying problem is consumption (resource throughput). Precaution, lifestyle simplicity and grass roots action are the most effective responses.
  • The individualist’s story (nature benign): To address climate change, rely on laissez-faire markets to spur competition and innovation. The benefits of climate change may even balance out the costs.
  • The fatalist’s story (nature capricious): Natural forces are beyond human understanding, much less human influence.

A fifth worldview, called “nature resilient” (Thompson, Ellis & Wildavsky 1990) or “nature evolving” (Holling, Gunderson & Ludwig 2002) is sometimes pictured at the central intersection of the axes, overlapping each of the others – we might say, in the language of psychologist Ken Wilber, transcending and including each of the others.

Short Links: Climate change economics and impacts, dealing with data, and analyzing social networks

  1. Paul Krugman writes a popular article in New York Times Magazine on climate change economics.
  2. Nature reports on how Marine Reserves can be a ‘win–win’ for fish and fishermen.  Our colleague Terry Hughes research is mentioned.
  3. Nature Reports Climate Change has several articles that relate to resilience to sea level rise.  Mark Schrope describes coastal development in Florida (which combines a lack of planning with a lack of memory). Mason Inman reports on ecological engineering to adapt to sea level rise.
  4. An Economist special report on dealing with large volumes of data.
  5. Mathematican Steven Storgatz writes about analysis of social networks in New York Times in the Enemy of My Enemy.

Johan Röckstrom talks about Planetary Boundaries

Johan Röckstrom recently gave a talk on Planetary Boundaries based on the papers Nature (doi:10.1038/461472a) and Ecology and Society.

In those papers the authors propose propose nine planetary boundaries, beyond which the functioning of the earth system will fundamentally change from the conditions in which human civilization has emerged.  They argue that we have crossed the climate, nitrogen and extinction boundaries, and need to change the course of our civilization to move back into  conditions which provide a safety for human civilization.

The talk is now up in two parts on YouTube (but the quality is only ok).

Rob Hopkins and Neil Adger on transition towns and resilience

Rob Hopkins founder of the Transition movement has a long interview with Neil Adger on resilience, peak oil, and climate adaptation on Transition CultureNeil Adger is a professor in Environmental Sciences at the University of East Anglia and a member of the Resilience Alliance (Neil briefly explains social resilience in a video here).

RH: I was reading a piece of yours yesterday where you wrote “some elements of society are inherently vulnerable, and others are inherently resilient.” What is it that determines the degree to which things are vulnerable or resilient?

NA: First of all both vulnerability and resilience need a referent, so we need to be vulnerable to something, or resilient to something. I think the things that parts of society are vulnerable to are environmental change at the large scale, and the changes in the way the world and society works, which you can capture in the idea of globalisation. Some parts of society are, in effect, vulnerable to the large scale structural changes that are happening around the world – the changes in the flows of capital and labour and the restrictions on those, and the impact that that has on their life and livelihoods.

So if you think about the farming sector, it’s vulnerable to large scale price shocks, and we as consumers are vulnerable to large scale price shocks around the world. Some parts of society are vulnerable to environmental change and in combination are vulnerable to the sorts of things that are going on in terms of economic globalisation around the world. Others are more resilient. But being resilient to the forces of globalisation doesn’t necessarily mean that those parts of society are immune to them or even aren’t integrated into them.

I don’t think you can simply isolate yourself from the globalised world and say, “well, that’ll make us more resilient”. It’ll make us more resilient in some senses, but the world is as it is and I think we just need to deal with the fact that it’s more globally integrated and look on the positive side of that and reap the benefits of it.

Would you not have any truck with the idea that a resilient society is one where local economies are stronger?

I don’t disagree with that. What I’m saying is that local economies, for all sorts of reasons, are actually stronger and likely to be more resilient, because if we go back to the definition, they have more autonomy and room for self organisation and adaptability and change. Hence, I think it’s impossible to isolate a community or society from a globalised world.

Simply looking to give more autonomy to a community is a positive thing, but trying to isolate it from the rest of the world and not realise that we’re globalised and all the rest of it isn’t a sensible thing to do. As I say, there are a lot of benefits to globalisation (not necessarily economic globalisation) such as the flow of information around the world, global solidarity with places in other parts of the world. There are all sorts of up sides to globalisation. I’m sure you’re familiar with all those arguments and you know this on the ground.

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Ecosystem services and finance job with Natural Capital Project

From WWF:

Natural Capital Project – Policy and Finance Specialist

World Wildlife Fund (WWF), the global conservation organization, seeks a talented colleague to help lead The Natural Capital Project’s efforts to develop innovative policy and finance approaches for mainstreaming ecosystem services. The Natural Capital Project (NatCap) – a partnership of World Wildlife Fund, Stanford University and The Nature Conservancy – develops tools to quantify ecosystem services and incorporate their value into decisions, and demonstrates these approaches in important, contrasting places around the world. (www.naturalcapitalproject.org ).

The successful candidate will: provide policy and finance technical expertise to NatCap partner sites; lead projects with major external policy institutions who are interested in deploying NatCap’s tools and approaches more widely; lead the development of policy tools that enable the effective integration of ecosystem services into decisions; help to refine and further develop NatCap’s policy and finance strategy; enable lesson sharing among users of NatCap’s tools and approaches, and help with other tasks as required, particularly in the areas of fund-raising, communications, partner coordination and publications. This position has an initial duration of two years, with the possibility of extension based on funding.

Basic requirements include: a Master’s degree or equivalent experience in public policy, international development, environmental/ecological economics, environmental management, law, business or related field. A minimum of two years additional experience working on relevant policy or finance issues in the public or private sector, preferably with significant international experience.  Experience with fundraising, project development and working with multiple partners. Excellent operational, communication and organizational skills. Must be able to work independently and as part of a decentralized, diverse team. Applicants must be available to travel.  Please submit a cover letter and resume by April 9, 2010.

AA/EOE Women and minorities are encouraged to apply.  To apply visit http://www.worldwildlife.org/who/careers/jobs.html, job # 10069

Andrew Gelman’s statistical lexicon

On his group’s weblog, influential Bayesian statistican Andrew Gelman proposes a statistical lexicon to make important methods and concepts related to statistics better know:

The Secret Weapon: Fitting a statistical model repeatedly on several different datasets and then displaying all these estimates together.

The Superplot: Line plot of estimates in an interaction, with circles showing group sizes and a line showing the regression of the aggregate averages.

The Folk Theorem: When you have computational problems, often there’s a problem with your model. …

Alabama First: Howard Wainer’s term for the common error of plotting in alphabetical order rather than based on some more informative variable.

The Taxonomy of Confusion: What to do when you’re stuck.

The Blessing of Dimensionality: It’s good to have more data, even if you label this additional information as “dimensions” rather than “data points.”

Scaffolding: Understanding your model by comparing it to related models.

Multiple Comparisons: Generally not an issue if you’re doing things right but can be a big problem if you sloppily model hierarchical structures non-hierarchically.Taking a model too seriously: Really just another way of not taking it seriously at all.

Three links: green revolution, scientific commons, and transition towns

1) Jeremy Cherfas writes on the Agricultural Biodiversity Weblog about the history of the green revolution:

The standard litany against the Green Revolution is that it failed to banish hunger because the technologies it ushered in were no use to small peasant farmers. Farmers with access to cash and good land did well, but poorer farmers on marginal land got nothing out of the revolution, and if they did somehow buy into it (subsidies, handouts) they were worse off afterwards. That’s not to deny that the Green Revolution increased yields, especially of wheat and rice. Just to say that it did nothing for most smallholders.A wonderful paper by Jonathan Harwood, in Agricultural History, demonstrates that this wasn’t always so. In the early days of the Rockefeller Foundation’s Mexican Agricultural Program, starting in the 1940s, the target was “resource-poor farmers who could not afford to purchase new seed annually”. The MAP’s advisors put improving cultivation practices at the top of their list, with better varieties second. And the improved varieties were to come from “introduction, selection or breeding”.

2) Ethan Zuckerman writes about John Wilbanks on Science Commons, and generativity in science:

One way to think of the mission of Science Commons, Wilbanks tells us, is to spark generative effects in the scientific world much as we’ve seen them in the online world. He quotes Jonathan Zittrain’s definition of generativity, from “The Future of the Internet… and How to Stop It“: “Generativity is a system’s capacity to produce unanticipated change through unfiltered contributions from broad and varied audiences”. This raises some provocative questions, when applied to the world of science: “What does spam look like in a patent system? What does griefing look like in the world of biological data?”

The truth is that the scientific world is far less generative than the digital space. He proposes three major obstacles to generativity: accessibility, ease of mastery, and tranferability. He points out that, as science has gotten more high tech, it’s far harder to master. The result is hyperspecialization: neuroanatomists don’t talk to neuroinformaticists… “and god help you if you cross species lines.” And so universities are making huge investments to try to encourage collaboration: MIT’s just build a $400 million building – the Cook Center – to force collaboration between cancer researchers… and predictably, researchers are fighting the mandate to move in and work together.

3) Judith D. Schwartz writes about the Transition Town movement in Learning About Transition Via Its Vocabulary in Miller-McCune Online Magazine.

Transition: In Hopkins’ words, “Transition” represents “the process of moving from a state of high fossil-fuel dependency and high vulnerability to a state of low fossil-fuel dependency and resilience.” Transition “is not the goal itself — it’s the journey,” he says. Specifically, it’s seeing this journey as an opportunity to embrace rather than a calamity to approach with dread.

“Transition” is predicated on the assumption that society cannot keep consuming energy and other resources at our current pace and that we’re better off accepting this reality and choosing how to adapt rather than letting ourselves get backed into a crisis. The idea is that the adaptation process can harness creative and even joyful possibilities that until now have laid dormant in our towns and cities. As Hopkins has been known to say, “It’s more like a party than a protest march.”

Resilience: A community’s ability to adapt and respond to changes, as well as to withstand shocks to the system, such as disruptions in food or energy supply chains. Resilience differs from “sustainability” in that the emphasis is on community survival as opposed to maintaining the structures and behavioral patterns that currently exist.

“Resilience is the new sustainability,” says Michael Brownlee, a member of the Transition U.S. board and co-founder of Transition Boulder County, the first Transition Initiative in North America. “It’s been co-opted by almost everybody. Everybody is sustainable these days.”

Marketing aside, Hopkins says the two are intertwined: “Sustainability only works if it has resilience embedded in it.”

How much is African poverty really falling?

Martin Ravallion, Director of the Development Research Group of the World Bank,responds to Maxim Pinkovskiy and Xavier Sala-i-Martin’s NBER paper that estimates a decline in African poverty.  He agrees that poverty is decreasing, but believes they are overstating their case.

He writes Is African poverty falling? on the World Banks’ Africa can end poverty blog:

We must first be clear about what we mean when we say “poverty is falling”. What many people mean is falling numbers of poor. However, PSiM [Pinkovskiy & Sala-i-Martin] refer solely to the poverty rate—the percentage of people who are poor. (There is no mention of this important distinction in their paper.) And it is not falling over their whole period of their analysis, which goes back to 1970. Rather they find that the poverty rate has been falling since the mid-1990s.

Here we agree: aggregate poverty rates have fallen in Sub-Saharan Africa (SSA) since the mid-1990s.  Shahoua Chen and I came to exactly the same conclusion in our research, for the World Bank’s global poverty monitoring effort, although our methods differ considerably and (no surprise) I prefer our methods.

However, Chen and I also point out that the decline in the aggregate poverty rate has not been sufficient to reduce the number of poor, given population growth. …

Two points to note here: (i) Chen and I show that the poverty decline in SSA tends to be larger for lower poverty lines (in the region $1-$2.50 a day) and (ii) PSiM’s method attributes the entire difference between GDP and household consumption to the current consumption of households, and they assume that its distribution is the same as in the surveys. These assumptions are very unlikely to hold, and they give an overly optimistic picture.

In effect, PSiM are using a lower poverty line than us.

…  Another important difference is that Chen and I are more cautious about the data limitations. There are not enough good household surveys available yet to be confident that this is a robust new trend of a falling poverty rate for SSA. PSiM are not so restrained, as is plain from their title!

…Hopefully we will see a confirmation of the emerging downward trend for Africa in the years ahead, as more (genuine) data emerge.

via
Chris Blattman

Over fertilizing the world

Three faces of global over fertilization from agriculture in China and the USA, and its complex effects on food webs.

1) Chinese farmers are acidifying there soil by over applying fertilizer.  Acidic soils impede crop growth and amplify the leaching of toxins.  Since the early 1980s, pH has declined from 0.2 to 0.8 across China, mostly due to overuse of fertilizer.  This is shown in a new Science paper, Significant Acidification in Major Chinese Croplands (DOI: 10.1126/science.1182570) by JH Guo and others.

Topsoil pH changes from 154 paired data over 35 sites in seven Chinese provinces between the 1980s and the 2000s. The line and square within the box represent the median and mean values of all data; the bottom and top edges of the box represent 25 and 75 percentiles of all data, respectively; and the bottom and top bars represent 5 and 95 percentiles, respectively. (From Guo et al)

Reporting on the paper Mara Hvistendahl writes, “Beginning in the 1970s, Chinese farmers applied ever-increasing amounts of fertilizer with the hope that it would lead to bigger harvests. Instead of high yield, however, they got water and air pollution. Today, agricultural experts estimate that in many parts of China fertilizer use can be slashed by up to 60%.”  In another issue of Science she also reports on current Chinese efforts to reduce fertilizer use.  In the Wall Street Journal, Geeta Annad reports on overfertilization in India “Pritam Singh, who farms 30 acres in Punjab, says the more desperate farmers become, the more urea they use. Overuse is stunting yields.”

2) The Washington Post reports on how in the US large feed lots are causing water quality problems in Manure becomes pollutant as its volume grows unmanageable

Animal manure, a byproduct as old as agriculture, has become an unlikely modern pollution problem, scientists and environmentalists say. The country simply has more dung than it can handle: Crowded together at a new breed of megafarms, livestock produce three times as much waste as people, more than can be recycled as fertilizer for nearby fields.

… Despite its impact, manure has not been as strictly regulated as more familiar pollution problems, like human sewage, acid rain or industrial waste. The Obama administration has made moves to change that but already has found itself facing off with farm interests, entangled in the contentious politics of poop.

3) Fertilization of ecosystems can have complex ecological consequences. In a paper in PNAS, John Davis and others show that in a Long-term nutrient enrichment decouples predator and prey production DOI: 10.1073/pnas.0908497107.

Relationship between primary consumer and predator secondary production for the reference stream (gray circles), the treatment stream (black circles), and previously published data (open circles). The arrows represent the temporal trajectory of the treatment stream starting with the 2 years of pretreatment (P1 and P2) and ending with the fifth year of enrichment (E5). The data labels correspond to the sampling year for the reference and treatment streams. The previously published data include 5 years of production data from the reference stream (C53) and a similar Coweeta stream (C55) that had experimentally reduced terrestrial leaf inputs during 4 of those years (21). It also includes previously published data from an unmanipulated year that compared our current reference (C53) and treatment (C54) streams (22). AFDM is ash-free dry mass.

Their research showed that there were differences in how predators and prey responded to fertilization, but these only emerged over time.  Increases N and P entering a stream increased populations of both predators and prey, however later on prey populations continued to increase but predator populations declined,because fertilzation shifted the streams prey to larger, predator resistant species, which reduced the efficiency with which energy flowed through the food web.