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Articles 1 - 6 of 6
Full-Text Articles in Geography
Complexity In Water And Carbon Dioxide Fluxes Following Rain Pulses In An African Savanna, Christopher A. Williams, Niall Hanan, Robert J. Scholes, Werner Kutsch
Complexity In Water And Carbon Dioxide Fluxes Following Rain Pulses In An African Savanna, Christopher A. Williams, Niall Hanan, Robert J. Scholes, Werner Kutsch
Geography
The idea that many processes in arid and semi-arid ecosystems are dormant until activated by a pulse of rainfall, and then decay from a maximum rate as the soil dries, is widely used as a conceptual and mathematical model, but has rarely been evaluated with data. This paper examines soil water, evapotranspiration (ET), and net ecosystem CO2 exchange measured for 5 years at an eddy covariance tower sited in an Acacia-Combretum savanna near Skukuza in the Kruger National Park, South Africa. The analysis characterizes ecosystem flux responses to discrete rain events and evaluates the skill of increasingly complex "pulse models". …
Drivers Of Inter-Annual Variability In Net Ecosystem Exchange In A Semi-Arid Savanna Ecosystem, South Africa, S. A. Archibald, A. Kirton, M. R. Van Der Merwe, R. J. Scholes, Christopher A. Williams, N. Hanan
Drivers Of Inter-Annual Variability In Net Ecosystem Exchange In A Semi-Arid Savanna Ecosystem, South Africa, S. A. Archibald, A. Kirton, M. R. Van Der Merwe, R. J. Scholes, Christopher A. Williams, N. Hanan
Geography
Inter-annual variability in primary production and ecosystem respiration was explored using eddy-covariance data at a semi-arid savanna site in the Kruger Park, South Africa. New methods of extrapolating night-time respiration to the entire day and filling gaps in eddy-covariance data in semi-arid systems were developed. Net ecosystem exchange (NEE) in these systems occurs as pulses associated with rainfall events, a pattern not well-represented in current standard gap-filling procedures developed primarily for temperate flux sites. They furthermore do not take into account the decrease in respiration at high soil temperatures. An artificial neural network (ANN) model incorporating these features predicted measured …
Latin America: Contesting Extraction, Producing Geographies, Anthony J. Bebbington
Latin America: Contesting Extraction, Producing Geographies, Anthony J. Bebbington
Geography
Characterizing continents is the business of fools, inviting the charge of essentialization, over-generalization, and caricature of nuanced and complex processes varying across space and over time. Likewise it can attract the criticism that to privilege the national or the regional understates the transnational dimensions of social change, and to take a territorialized view diverts attention from the networks that cut across space, linking distant actors and places. This short essay therefore claims neither to be a reflection on Latin America-wide phenomena, and far less a statement on the most significant aspects of the political economy of the region. It does, …
The World Development Report 2009 'Reshapes Economic Geography': Geographical Reflections, Jonathan Rigg, Anthony J. Bebbington, Katherine V. Gough, Deborah F. Bryceson, Jytte Agergaard, Niels Fold, Cecilia Tacoli
The World Development Report 2009 'Reshapes Economic Geography': Geographical Reflections, Jonathan Rigg, Anthony J. Bebbington, Katherine V. Gough, Deborah F. Bryceson, Jytte Agergaard, Niels Fold, Cecilia Tacoli
Geography
The Report focuses on the spatial transformations that must happen for countries to develop. Cities, migration and trade, it is claimed, have been the main catalysts of progress and hence ‗Growing cities, ever more mobile people, and increasingly specialised products are … essential for economic success‘ (World Bank 2009, xx). These greater densities, shorter distances and reduced divisions will, the Report argues, bring about unbalanced growth: however, over time, other policies and mechanisms for integration will foster convergence in living standards. Development, seen through the Report‘s eyes, involves a necessary (and welcome) spatial unevenness in economic activity coupled with progressive …
"Please Mr Bebbington, Don't Come Here And Tell Us What To Do", Anthony J. Bebbington
"Please Mr Bebbington, Don't Come Here And Tell Us What To Do", Anthony J. Bebbington
Geography
The work in question addresses the relationships between mining, local development and democracy, and the thus-far most contentious part of this research has focused on a region affected by a mining project executed by a UK based "resource development" company. This specific part of the research has been conducted in conjunction with a UK based solidarity organization, the Peru Support Group as well as with Oxfam UK's office in Perú. The criticism of meddling came from the director in Peru of the Chinese consortium that in early 2007 acquired majority ownership of the mining company – the title paraphrases his …
Contesting Environmental Transformation: Political Ecologies And Environmentalisms In Latin America And The Caribbean, Anthony J. Bebbington
Contesting Environmental Transformation: Political Ecologies And Environmentalisms In Latin America And The Caribbean, Anthony J. Bebbington
Geography
The available download on this page is the author manuscript accepted for publication. This version has undergone full peer review but has not been through the copyediting, typesetting, pagination and proofreading process.