Talking Climate

In 1997, world leaders met in Kyoto, Japan to discuss how to confront, combat, and adapt to climate change. Eighteen increasingly warmer (on average) years later, a new set of climate talks start in Paris (France, not Kentucky) today (30 November), and continue for 12 days.

Some U.S. politicians have already courageously declared that the U.S. will do nothing, no matter how compelling the evidence, how severe the problems, or what the rest of the world thinks. As we get a new round of public commentary during and after the Paris talks, two recent studies—one journalistic and one academic—are worth considering.

Texas Riparian Areas

Texas A&M University Press has recently published Texas Riparian Areas. According to TAMU Press's blurb: 

Riparian areas—transitional zones between the aquatic environments of streams, rivers and lakes and the terrestrial environments on and alongside their banks—are special places. They provide almost 200,000 miles of connections through which the waters of Texas flow. Keeping the water flowing, in as natural a way as possible, is key to the careful and wise management of the state’s water resources.

Love is...

The 22nd annual Conference on Critical Geography was hosted at the University of Kentucky this past October. In between sessions, conference participants had the opportunity to participate in a video booth project, titled Love Is.... Here, participants were asked to share their thoughts and opinions on the nature of love.

Lexington Evolves From College Town to 'University City'

 It's a partnership unlike any other, relying on each other to complete pivotal projects and daily deeds, constantly working together to find solutions.

Cindi Katz Keynote, "Revisiting Minor Theory," at 2015 Critical Geography Conference

Minor theory is a way of doing theory differently, of working inside out, of fugitive moves and emergent practices interstitial with ‘major’ productions of knowledge. To do minor theory is to make conscious use of displacement so that new subjectivities, spatialities, and temporalities might be marked and produced in spaces of betweenness that reveal the limits of the major as it is transformed along with the minor. Inspired by Deleuze and Guattari’s concept of ‘minor literature,’ I wrote about minor theory twenty years ago causing a ‘minor’ stir, but little else. In the past year or so the idea of the minor has surfaced in several places, not least as the theme of this conference. Asking what might underlie this ‘surgence’ of interest, I will look at some of the political, social, cultural relations and conditions of the present in Geography and in the worlds we inhabit to think about what possibilities minor theory offers for thinking and acting differently in the face of growing economic inequality at all scales, persistent violence against people of color, intensifying environmental crises, joblessness, and social relations of production and reproduction that remain exploitive and oppressive in their articulations of race, class, gender, and sexuality.

If I Had a Hammer

For the past five years or so, I have been working on adaptations of algebraic or spectral graph theory to study geomorphic, pedological, and ecological systems. My most recent development (unpublished, for reasons that will become clear in a moment) is some methods for measuring the complexity of historical sequences in Earth surface systems.

The idea is that a historical sequence represents a series of different states or stages—for example, vegetation communities along a successional trajectory; river channel morphological states; different soils in a paleosol sequence; depositional environments in a stratigraphic sequence, nodes of phylogenetic trees in biological evolution, etc.  These are treated as directed graphs. The states or stages are the graph nodes or vertices, and the historical transitions are the edges or links between the nodes.

Connecting the Dot Factors

The standard conceptual model for pedology, soil geomorphology, and soil geography is often called the “clorpt” model, for the way it was portrayed in Hans Jenny’s famous 1941 book The Factors of Soil Formation:

S = f(cl, o, r, p, t) . . . .

This equation states that soil types or soil properties (S) are a function of climate (cl), biotic effects (o for organisms), topography (r for relief), parent material (p), and t for time, conceived as the age of the surface the soils are formed on, or the time period the soil has been developing under a given broad set of environmental controls. This factorial approach, considering soils as a function of the combined, interacting influences of environmental factors such as geology, climate, and biota, was originated by V.V. Dokuchaev in Russia in the 1880s, popularized in English by C.F. Marbut in the 1920s and 1930s, and developed by Jenny into the familiar clorpt form.

The Dialectics of Geomorphic Complexity

Nearly 10 years ago, while pondering complex nonlinear dynamics in geomorphic systems, I was struck by how often we reduce problems to the interplay of opposing forces (e.g. uplift vs. denudation; soil formation vs. soil erosion, etc). I began to wonder how the concept of dialectics might be applicable in Earth sciences, or maybe I just wanted to increase my pseudo-intellectual street cred by using "dialectics" in an article. Anyway, I started work on a manuscript with the working title shown above, and then dropped it. I rediscovered it on the hard drive recently, and while I still can't convince myself it is journal article material, I do think there's some potentially interesting ideas there. 

What you see below is what I wrote in early 2006 (thus the absence of reference to work since then), unmodified except for putting in a few graphics to relieve the visual tedium.

1. Introduction

The title begs at least three questions: what do I mean by dialectics, how am I defining complexity, and how do I propose to link them?

1.1.  Geomorphic Complexity

Del Casino Delivers Geography's Distinguished Alumni Address

The University of Kentucky’s Department of Geography celebrates its inaugural Distinguished Alumni Lecture Series and Award Friday, Oct. 16. The premiere honoree is professor of geography and development Vincent del Casino Jr.,

The Dubious Power of Power Laws


Everyone knows the classic normal distribution—the “bell curve,” where most observations cluster around the mean, and the frequency falls off toward either end, with well known statistical properties. Lots of things in nature are more-or-less normally distributed, but lots of things are not. In some cases distributions are “heavy-tailed,” such that for example there are many of the small ones, and increasingly fewer as size increases. Famous examples are the distribution of earthquake magnitudes, rank-size distributions of cities, and the distribution of wealth in societies.

Models of avalanche size distributions in (mathematically-simulated) sand piles were seminal in developing ideas about self-organized criticality and power laws, both in geomorphology and in general. Unfortunately even real sandpiles, much less more complex systems, are not necessarily well described by the models.


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