Browsing by Author "Kaplan, Michael"

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    Maximum expansion of the Tenerife Glacier (51°S) during the last millennium
    (2024) Amigo, Gonzalo; Aravena, Juan Carlos; Ruiz, Paulina; Kaplan, Michael; Sagredo, Esteban
    In the Patagonian Andes it is still under debate when the glaciers reached their maxi-mum expansion during the last millennium. In this work we analyze the fluctuations of Tenerife Glacier (51 degrees), a small mountain glacier located immediately to the south of the Patagonian Ice Fields. A detailed analysis of the glacial landforms of the valley allowed us to identify three moraine systems, in the south-central, southwestern, and northern parts of the Monte Tenerife valley, respectively. Based on ages obtained by count tree rings (Nothofagus pumilio) and Placopsis cf. gelida (L.) Linds lichens diameter measure-ments, we estimated that the Tenerife Glacier receded from its maximum extent in the last thousand years immediately after 1742-1765 AD. The maximum expansion of the Tenerife Glacier during the last millennium coincides with the maximum expansions of the Schiaparelli (54 degrees S) and Stoppani (55 degrees S) glaciers. However, other glaciers reached their glacial maximum limit earlier and show temporal asynchrony in when they reached their largest extents. This suggests a temporal variability in the glacial maximum during the last millennium in southern Patagonia (49 degrees and 55 degrees S)
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    (Paleo)glacier studies in Patagonia over the past decades (1976–2020): A bibliometric perspective based on the Web of Science
    (2023) Soteres García, Rodrigo León; Riquelme, Fabián; Sagredo T., Esteban; Kaplan, MichaelSoteres García, Rodrigo León; Riquelme, Fabián; Sagredo T., Esteban; Kaplan, Michael
    Patagonia features the most extensive glaciers of the Southern Hemisphere, excluding Antarctica, and a vast inventory of glacial landforms, so it is thought to have played a key role in (paleo)glacier studies since the late 19th century. However, no systematic attempts to characterize the specific research trends and the scientific community focused on Patagonian cryosphere have been conducted so far. To fill this gap, we analyzed the metadata associated to 305 articles compiled from the Web of Science database following a bibliometric approach covering the period between 1976 and 2020. Our results point to an irregular but net increase on the number of contributions on Patagonian (paleo)glaciers. Mass balance analyses based on satellite data of present-day glaciers and the reconstruction of past glacier activity by dating glacial landforms formed during the Last Glacial Termination, were the most addressed topics during the analyzed period. Patagonian (paleo)glacier studies are mostly published in generic Earth Sciences publications, followed by Quaternary and glaciological journals. Most of the studies were led by scientists from the United Kingdom, followed by Chile, Argentina and United States. In terms of collaborations, these studies can be divided into two main clusters, one composed by researchers from United States, Chile and Argentina institutions, and another mostly composed by British researchers. So far, the most prolific authors are nearly equally distributed in nationality, yet gender inclusion and international collaborations are still caveats that must be solved. Even though our query on the Web of Science missed highly influential (so-called) grey literature, such as local scientific journals and technical reports, the reviewed scientific literature unambiguously indicates that Patagonia is a privileged location for (paleo)glaciers studies worldwide and that it will continue offering vast opportunities to tackle critical questions related to global cryosphere and past-to-present climate changes.