30
views
0
recommends
+1 Recommend
2 collections
    0
    shares
      • Record: found
      • Abstract: found
      • Article: found
      Is Open Access
      Revista de la Asociación Geológica Argentina
      Asociación Geológica Argentina
      Climatic change, Dry and wet scenario, Geoenvironmental hazard, Early alert, Mitigation, Cambio Climático, Escenario seco y húmedo, Riesgos geoambientales, Alerta temprana, Mitigación

      Read this article at

      Bookmark
          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

          Abstract

          La variabilidad espacial y temporal de los efectos del calentamiento global aconseja aplicar la perspectiva regional en la predicción de sus impactos sobre el paisaje natural y las comunidades. En este trabajo se presenta una aproximación metodológica preliminar, cuyos fundamentos son: a) la reconstrucción paleoclimática regional y la determinación de escenarios extremos de cambio climático; b) la evaluación de amenazas ambientales generadas en cada escenario; c) el desarrollo de planes de alerta temprana y prevención de riesgos. Mediante la reconstrucción paleoclimática regional en tres escalas temporales (centenal, milenaria y el Holoceno) se identificaron dos escenarios extremos de cambio climático (húmedo y seco). La perioricidad de ENSO (El Niño/La Niña) en la región, sumado a la influencia de los cambios paleoclimáticos de los últimos milenios en la dinámica ocupacional de las comunidades agroalfareras permitio una aproximación a los posibles impactos futuros. Se dividió el área metropolitana de Tucumán en unidades de relieve, subdivididas en unidades menores según el uso del suelo (urbano, suburbano y rural). En cada escenario de cambio climático, unidad de relieve y uso del suelo se evaluaron las principales amenazas generadas por los extremos de variabilidad climática. Para cada amenaza ambiental, es posible desarrollar planes alerta temprana, protección o mitigación. Esta primera aproximación espacial podrá ser mejorada cuando la complejidad de la información colectada permita una valoración cuantitativa, a mayor escala, mediante información satelitaria y los sistemas de información geográfica.

          Translated abstract

          The present paper discusses the type and intensity of environmental hazards affecting the urban conglomerate of Greater San Miguel de Tucumán in the presence of future climatic changes. The steps required for making regional predictions as regards their impact on superficial geodynamics are described on the basis of the poor reliability of global models and on the marked spatial variability influencing natural or anthropized landscape. The significance of paleoclimatic reconstructions is stressed as an expression of the prevalent regional environmental conditions in the past, free of anthropogenic influence. The data is analyzed at three levels of temporal resolution (the last decades, the last millennium, and the Holocene period). The first level discusses inter-annual variability and" El Niño-La Niña" Southern Oscillation effects on the generation of morphodynamic processes negatively affecting the metropolitan area of Tucumán. The millenarian climatic variability analysis stresses the environmental changes influencing regional agro-pottery cultures and the extreme humid-arid climatic conditions during the Holocene period associated to paleoedaphic development and loess deposition. Consequently, two potential scenarios for climatic change are described, characterized by definitely more humid conditions or by marked aridity. The metropolitan area was divided into seven geo-morphological units. Matrices were elaborated so as to perform qualitative assessment of the potential intensity of each environmental hazard on every extreme scenario for climatic change and under different conditions of soil-use (urban, suburban, and rural). In brief, this proposal constitutes a preliminary approximation to the characterization of the future effects of climatic change with the purpose of contributing to the development of early alert, prevention, and/or mitigation programs.

          Related collections

          Most cited references33

          • Record: found
          • Abstract: found
          • Article: not found

          Constraints on future changes in climate and the hydrologic cycle.

          What can we say about changes in the hydrologic cycle on 50-year timescales when we cannot predict rainfall next week? Eventually, perhaps, a great deal: the overall climate response to increasing atmospheric concentrations of greenhouse gases may prove much simpler and more predictable than the chaos of short-term weather. Quantifying the diversity of possible responses is essential for any objective, probability-based climate forecast, and this task will require a new generation of climate modelling experiments, systematically exploring the range of model behaviour that is consistent with observations. It will be substantially harder to quantify the range of possible changes in the hydrologic cycle than in global-mean temperature, both because the observations are less complete and because the physical constraints are weaker.
            Bookmark
            • Record: found
            • Abstract: not found
            • Article: not found

            How Warm Was the Medieval Warm Period?

              Bookmark
              • Record: found
              • Abstract: found
              • Article: not found

              The hydrologic cycle in deep-time climate problems.

              Hydrology refers to the whole panoply of effects the water molecule has on climate and on the land surface during its journey there and back again between ocean and atmosphere. On its way, it is cycled through vapour, cloud water, snow, sea ice and glacier ice, as well as acting as a catalyst for silicate-carbonate weathering reactions governing atmospheric carbon dioxide. Because carbon dioxide affects the hydrologic cycle through temperature, climate is a pas des deux between carbon dioxide and water, with important guest appearances by surface ice cover.
                Bookmark

                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Journal
                raga
                Revista de la Asociación Geológica Argentina
                Rev. Asoc. Geol. Argent.
                Asociación Geológica Argentina (Buenos Aires )
                1851-8249
                June 2010
                : 66
                : 4
                : 544-554
                Affiliations
                [1 ] Universidad Nacional de Tucumán Argentina
                [2 ] Consejo Nacional de Investigaciones Científicas y Técnicas Argentina
                Article
                S0004-48222010000300012
                50360a6f-4f4a-4af7-a34c-69ce89583bc6

                http://creativecommons.org/licenses/by/4.0/

                History
                Product

                SciELO Argentina

                Self URI (journal page): http://www.scielo.org.ar/scielo.php?script=sci_serial&pid=0004-4822&lng=en
                Categories
                GEOLOGY
                GEOSCIENCES, MULTIDISCIPLINARY

                General geosciences,Geology & Mineralogy
                Climatic change,Dry and wet scenario,Geoenvironmental hazard,Early alert,Mitigation,Cambio Climático,Escenario seco y húmedo,Riesgos geoambientales,Alerta temprana,Mitigación

                Comments

                Comment on this article