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Torres Trinidad Ortiz José E. Mediavilla Rosa Sánchez-Palencia Yolanda Santisteban Juan Ignacio Vega-Panizo Rogelio 《Natural Hazards》2022,111(3):2721-2748
Natural Hazards - The coastal zone in which the lagoons of La Mata and Torrevieja (Eastern Spain) developed can be described as a compilation of geo-hazards typical of the Mediterranean realm. This... 相似文献
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Roshan Gholamreza Najafei Mohammad Saeed Costa Ángel M. Orosa José A. 《Arabian Journal of Geosciences》2015,8(4):2359-2370
Arabian Journal of Geosciences - This study explores the effect of future climate change on wind energy conversion in Iran, based on data from existing wind farms. In an effort to estimate and... 相似文献
928.
A space-filling curve in 2,3,or higher dimensions can be thought as a path of a continuously moving point.As its main goal is to preserve spatial proximity,this type of curves has been widely used in the design and implementation of spatial data structures and nearest neighbor-finding techniques.This paper is essentially focused on the efficient representation of Digital Ele-vation Models(DEM) that entirely fit into the main memory.We propose a new hierarchical quadtree-like data structure to be built over domains of unrestricted size,and a representation of a quadtree and a binary triangles tree by means of the Hilbert and the Sierpinski space-filling curves,respectively,taking into account the hierarchical nature and the clustering properties of this kind of curves.Some triangulation schemes are described for the space-filling-curves-based approaches to efficiently visualize multiresolu-tion surfaces. 相似文献
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Marta Rodrigues Anabela Oliveira Martha Guerreiro André Bustorff Fortunato José Menaia Luís Mesquita David Alexandra Cravo 《Ocean Dynamics》2011,61(6):841-856
This study aims at understanding the fecal contamination behavior in a small coastal stream (Aljezur, Portugal), which has
significant economic and ecological values. Like in most small coastal systems, circulation and water renewal in the Aljezur
stream exhibit a strong variability due to their dependence on tides, waves, intermittent river flows, and a highly variable
morphology. Hence, the problem was approached through a combination of field surveys and the development and application of
a hard-coupled three-dimensional hydrodynamic and fecal contamination model. Salinity and temperature results have shown that
mixing and transport in the stream are very sensitive to the river flow and wind forcing. The model is able to represent the
main patterns and trends observed in Escherichia coli and fecal enterococcus concentrations along the stream, for different environmental and contamination conditions, suggesting
die-off rates on the order of 0.50–0.55 day−1. Die-off rate and the representation of the sediment-associated processes were identified as the major remaining sources
of uncertainty in the model. Results show that, owing to the processes that occur along the stream, fecal bacteria reach the
beaches water in numbers that comply with the European Bathing Waters Directive, even during the summer periods when the upstream
concentrations are larger. In particular, results suggest a direct relation between the tidal propagation upstream and the
reduction of the fecal bacteria concentrations along the stream that can be relevant for the development of a strategy for
the management of the system’s water safety. 相似文献
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Christopher A. Cunningham Jos�� Paulo Bonatti 《Theoretical and Applied Climatology》2011,106(1-2):23-44
This work examines the near-surface responses, in the Southern Hemisphere atmosphere, to a reduction and an excess of sea ice cover in the Ross Sea. Large ensembles (60 members) of the Atmospheric General Circulation Model of the Center for Weather Forecast and Climate Studies (AGCM-CPTEC) are used for this purpose. Locally, when the sea ice cover decreases (increases), heat fluxes, temperature, and pressure increase (decreases). A principal component analysis of temperature and geopotential height identifies the potential remote connections. We have found three main results: first, an association between the sea ice cover in the Ross Sea and a wave train that resembles the Pacific South American (PSA) pattern; second, a relationship between temperatures in the Ross Sea and in the southern South America; and third, an apparent correspondence between reduced sea ice cover in the Ross Sea and the subtropical jet over Australia. 相似文献