Persona:
Pellitero Ondicol, Ramón

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rpellitero@geo.uned.es
ORCID
0000-0002-0283-379X
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Pellitero Ondicol
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Ramón
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2010 - 201912020 - 20243
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Mostrando 1 - 4 de 4
  • Miniatura
    Publicación
    60 million years of glaciation in the Transantarctic Mountains
    (Springer Nature, 2022-09-21) Barr, Iestyn D.; Spagnolo, Matteo; Rea, Brice R.; Bingham, Robert G.; Oien, Rachel P.; Adamson, Kathryn; Ely, Jeremy C.; Mullan, Donal J.; Pellitero Ondicol, Ramón; Tomkins, Matt D.
    The Antarctic continent reached its current polar location ~83 Ma and became shrouded by ice sheets ~34 Ma, coincident with dramatic global cooling at the Eocene-Oligocene boundary. However, it is not known whether the first Antarctic glaciers formed immediately prior to this or were present significantly earlier. Here we show that mountain glaciers were likely present in the Transantarctic Mountains during the Late Palaeocene (~60–56 Ma) and middle Eocene (~48–40 Ma). Temperate (warm-based) glaciers were prevalent during the Late Eocene (~40–34 Ma) and, in reduced numbers, during the Oligocene (~34–23 Ma), before larger, likely cold-based, ice masses (including ice sheets) dominated. Some temperate mountain glaciers were present during the Miocene Climatic Optimum (~15 Ma), before a widespread switch to cold-based glaciation. Our findings highlight the longevity of glaciation in Antarctica and suggest that glaciers were present even during the Early-Cenozoic greenhouse world.
  • Miniatura
    Publicación
    Morphometric analysis of cirques on the Iberian Peninsula provides insights into climate during past glaciations
    (ELSEVIER, 2024) Pellitero Ondicol, Ramón; Barr, Iestyn D.; Spagnolo, Matteo S.; Tomkins, Matthew D.; https://orcid.org/0000-0002-9066-8738; https://orcid.org/0000-0002-2753-338X; https://orcid.org/0000-0001-5403-7405
    We present the first comprehensive geodatabase of glacial cirques on the Iberian Peninsula, excluding the Pyrenees. A total of 1519 cirques were mapped using Google Earth, guided by published literature. Cirque morphometry was retrieved using the ACME GIS tool. Cirques on the Iberian Peninsula are mostly located in the Cantabrian Range, with smaller populations in the Iberian, Central and Betic ranges. Cirque lowest point elevation increases from N to S and W to E, following the glacier equilibrium-line altitude during the local Last Glacial Maximum. Cirque location, orientation, shape and size suggest they developed during marginal glaciations, except in certain subregions of the Cantabrian Range. Cirque location and orientation indicate that during cirque development atmospheric circulation was similar to present.
  • Miniatura
    Publicación
    Cartografía
    (UNED-Universidad Nacional de Educación a Distancia, 2024) Lázaro Torres, María Luisa de; Gallardo Beltrán, Marta; Pellitero Ondicol, Ramón
    Esta obra está dirigida a todos aquellos interesados en adentrarse en el mundo de la cartografía, incluyendo a estudiantes universitarios que cursan esta materia. La ciencia cartográfica surge con el propósito de resolver un problema fundamental: el de representar y comunicar información geográfica sobre el entorno que rodea a la humanidad, hoy conocida también como información geoespacial o geoinformación (GI), mediante la creación de mapas. Este proceso implica la traducción de la realidad a un formato cartográfico o de geoinformación. Las fuentes de información geográfica son cada vez más diversas en su origen (sensores de satélites y dispositivos móviles, datos propios y remotos, censos, etc.), en su volumen (big data geolocalizados), y en sus formatos (imágenes, textos, números). Por lo tanto, es factible emplear en un mismo mapa, con ayuda de las geotecnologías, datos de diversas fuentes de procedencia y formatos.
  • Miniatura
    Publicación
    Geodiversity and geomorphosites assessment applied to a Natural Protected Area: The Ebro and Rudron Canyons Natural Park (Spain)
    (Springer, 2010-10-24) Pellitero Ondicol, Ramón; González Amuchastegui, María José; Ruiz Flaño, Purificación; Serrano, Enrique
    Geodiversity and geomorphosites in a natural protected area in Spain are evaluated. The estimation of geodiversity has been calculated by habitat and by geomorphological unit based on the calculation method developed by Serrano and Ruiz-Flaño, and geomorphosites have been assessed for the same area. Finally, results from the calculation of geodiversity and geomorphosites are compared. The aim is to introduce a series of tools that the manager can apply to integrate abiotic aspects in the evaluation and protection of areas with outstanding natural diversity and considerable natural heritage.