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  • 1
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    País de Mares No. 3, 2017 (2022)
    Editorial Dimar | Bogotá D.C., Colombia
    Details
    Publication Date: 2022-08-18
    Description: Contenido: -- Colombia extiende la cobertura en servicios de seguridad marítima. -- Seaflower, Plan Nacional de Expediciones Científicas. -- Dimar aporta a la seguridad de las maniobras de descargue de material para obras del aeropuerto “El Embrujo”. -- Un “Guardián” en los cielos de nuestro mar. -- Nuevas alianzas: Dimar, comprometida con la seguridad marítima internacional. -- Sistemas de gestión de calidad aplicados a la protección marítima en Colombia. -- Oficina de asuntos portuarios del puerto de Barranquilla. -- Nueva plataforma de investigación para nuestros mares: ARC “Roncador”. -- “Vamos a hacer muy pronto la mejor autopista de Colombia”. -- En la Escuela Naval de Suboficiales ARC “Barranquilla”. Nuevos programas de seguridad marítima y código PBIP. -- Colombia, un país de espaldas a la planeación del territorio marítimo. -- Puerto Drummond. Trascendiendo fronteras con calidad, innovación y compromiso. -- Magdalena global: del Río al mundo. -- Un día Pacífico en la protección del medio ambiente marino. -- Impacto de la zonificación y ordenamiento de playas turísticas para la consolidación de la seguridad integral marítima. -- ARC “Ciénaga de Mallorquín”: 19 años de historia y excelente labor. -- Puerto de Barranquilla: 80 Años impulsando desarrollo. -- Colombia, incluida en la “Lista Blanca” de la OMI. -- El transporte marítimo Colombia - Ecuador, un compromiso de integración fronteriza para el desarrollo de una región vulnerable. -- Colombia entró al mapa internacional del gas natural licuado. -- Japón sede del curso y entrenamiento internacional MOU y OMI.
    Description: Published
    Description: Not Known
    Keywords: Investigación científica ; Seguridad marítima ; Puerto ; Medio ambiente ; Historia ; Buque de investigación ; Internacional ; Formación ; ASFA_2015::E::Education ; ASFA_2015::I::International relations ; ASFA_2015::E::Equipment ; ASFA_2015::I::Information scientists ; ASFA_2015::V::Vessels ; ASFA_2015::S::Safety ; ASFA_2015::P::Port installations
    Repository Name: AquaDocs
    Type: Book/Monograph/Conference Proceedings
    Format: 87pp.
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  • 2
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    Tropical tree growth driven by dry-season climate variability (2022)
    In:  Nature Geoscience
    Details
    Publication Date: 2022-05-04
    Description: Interannual variability in the global land carbon sink is strongly related to variations in tropical temperature and rainfall. This association suggests an important role for moisture-driven fluctuations in tropical vegetation productivity, but empirical evidence to quantify the responsible ecological processes is missing. Such evidence can be obtained from tree-ring data that quantify variability in a major vegetation productivity component: woody biomass growth. Here we compile a pantropical tree-ring network to show that annual woody biomass growth increases primarily with dry-season precipitation and decreases with dry-season maximum temperature. The strength of these dry-season climate responses varies among sites, as reflected in four robust and distinct climate response groups of tropical tree growth derived from clustering. Using cluster and regression analyses, we find that dry-season climate responses are amplified in regions that are drier, hotter and more climatically variable. These amplification patterns suggest that projected global warming will probably aggravate drought-induced declines in annual tropical vegetation productivity. Our study reveals a previously underappreciated role of dry-season climate variability in driving the dynamics of tropical vegetation productivity and consequently in influencing the land carbon sink.
    Type: info:eu-repo/semantics/article
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  • 3
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    Characterization of the Crystallographic Preferred Orientation Relationships of the Magnetite-Hematite-Goethite Phase Transformation during Martitization (2022)
    In:  Minerals
    Details
    Publication Date: 2022-05-25
    Description: The most frequent crystallographic preferred orientations developed during the progressive phase transformation of magnetite-hematite-goethite are described and analyzed in two natural samples of banded iron formations from Carajás Mineral Province. Microtextures of martitized grains containing the three phases and the microplaty matrix were analyzed in a scanning electron microscope equipped with a detector for electron backscatter diffraction. For identifying the correlation between magnetite, hematite and goethite lattice and topotaxity during transformation, multiple orientation relationships between the three phases were tested and verified using three-dimensional misorientation analysis. The results show that basal planes of goethite coincide with basal planes of hematite, which coincide with octahedral planes of magnetite. This indicates that transformation between the three minerals happens topotactically, and the oxygen lattice framework is preserved in all members of the reaction as a form of crystallographic memory. As a result of progressive and cyclical changes in oxidation/reduction conditions, an assemblage of high-order orientation relationships is observed and assigned to a complex process of transformation twinning in-between phase transformation of magnetite, hematite and goethite. In the N4WS iron ore deposit, iron oxides/hydroxides from martitized grains work as susceptible markers of environmental changes still in solid state during the diagenetic process.
    Type: info:eu-repo/semantics/article
    Format: application/pdf
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