Turbulent flux and meteorological measurements during ARCTEX-2006 campaign

This dataset present result from the DFG- funded Arctic-Turbulence-Experiment (ARCTEX-2006) performed by the University of Bayreuth on the island of Svalbard, Norway, during the winter/spring transition 2006. From May 5 to May 19, 2006 turbulent flux and meteorological measurements were performed on the monitoring field near Ny-Ålesund, at 78°55'24'' N, 11°55'15'' E Kongsfjord, Svalbard (Spitsbergen), Norway. The ARCTEX-2006 campaign site was located about 200 m southeast of the settlement on flat snow covered tundra, 11 m to 14 m above sea level. The permanent sites used for this study consisted of the 10 m meteorological tower of the Alfred Wegener Institute for Polar- and Marine Research (AWI), the international standardized radiation measurement site of the Baseline Surface Radiation Network (BSRN), the radiosonde launch site and the AWI tethered balloon launch sites. The temporary sites - set up by the University of Bayreuth - were a 6 m meteorological gradient tower, an eddy-flux measurement complex (EF), and a laser-scintillometer section (SLS). A quality assessment and data correction was applied to detect and eliminate specific measurement errors common at a high arctic landscape. In addition, the quality checked sensible heat flux measurements are compared with bulk aerodynamic formulas that are widely used in atmosphere-ocean/land-ice models for polar regions as described in Ebert and Curry (1993, doi:10.1029/93JC00656) and Launiainen and Cheng (1995). These parameterization approaches easily allow estimation of the turbulent surface fluxes from routine meteorological measurements. The data show: - the role of the intermittency of the turbulent atmospheric fluctuation of momentum and scalars, - the existence of a disturbed vertical temperature profile (sharp inversion layer) close to the surface, - the relevance of possible free convection events for the snow or ice melt in the Arctic spring at Svalbard, and - the relevance of meso-scale atmospheric circulation pattern and air-mass advection for the near-surface turbulent heat exchange in the Arctic spring at Svalbard. Recommendations and improvements regarding the interpretation of eddy-flux and laser-scintillometer data as well as the arrangement of the instrumentation under polar distinct exchange conditions and (extreme) weather situations could be derived.

Neoextractivismo, neodesarrollismo y proceso de acumulación de capital : ¿Superando el ciclo stop-and-go? Argentina, 2003-2012

Argentina ha entrado en una etapa de acumulación capitalista estabilizada bajo un nuevo proyecto de desarrollo hegemónico. Este proyecto avanza en la conformación de un patrón de acumulación de capital que busca superar las contradicciones entre el eje extractivista-rentista y el eje industrialista de las fracciones dominantes del capital. En esta ponencia discutiremos sí y de qué manera el histórico par campo-industria analizado en los clásicos modelos de acumulación à la Diamand, habrían perdido relevancia. Buscaremos analizar cómo las contradicciones latentes pretenden ser desplazas y qué lugar tiene la contradicción entre el capital y el trabajo en la nueva etapa que se está abriendo. El trabajo se basará en una reflexión histórico-conceptual apoyada en estadísticas construidas a partir de la información provista por los organismos públicos de estadísticas