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Dr. Juan Federico Ponce
Dr. Juan Federico Ponce
Juan Federico Ponce is a researcher at CADIC, the National Research Council of Argentina's Southern Center for Scientific Investigation, as well as a professor at the National University of Tierra del Fuego. He is a geologist specializing in geomorphology and palynology. His main area of research is climatic and environmental change in southern Patagonia in the late Cenozoic. I was lucky enough to receive a crash course in the geomorphology of southern Patagonia and Antarctica from Juan while studying in Ushuaia this past spring.
PONCE, J. F., Rabassa, J., Coronato, A., & Borromei, A. M. (2011). Palaeogeographical evolution of the Atlantic coast of Pampa and Patagonia from the last glacial maximum to the Middle Holocene. Biological Journal of the Linnean Society, 103(2), 363-379.
This study recreates the paleogeographic evolution of the Patagonian continental shelf for the period spanning the Last Glacial Maximum (LGM) to the middle Holocene using a global sea level rise curve and Global Mapper 10 software. The model enables the possibility of chronologically locating the formation of the main coastal features of the southernmost end of South America. This model provided new information for future paleoclimatic reconstructions, and is of particular assistance in studies designed to examine biosphere patterns of expansion, dispersal, and migration in Pampa and Patagonia during the Late Glacial period.
The separation of the Isla Grande de Tierra del Fuego and the formation of the Straits of Magellan (Ponce, et al 2011)
Coronato, A., Seppälä, M., Ponce, J. F., & Rabassa, J. (2009). Glacial geomorphology of the Pleistocene Lake Fagnano ice lobe, Tierra del Fuego, southern South America. Geomorphology, 112(1-2), 67-81.
This paper presents a regional geomorphological study of the southern and eastern coasts of Lake Fagnano, one of the most extensive glacial areas in Tierra del Fuego. Based on the location of erosional and depositional glacial landforms, the authors make a paleoglacial reconstruction of Lake Fagnano. The study proposes a glacial/deglaciation model along the entire basin during the Upper Pleistocene and establishes several new insights into past glacial processes in the region. The ice-covered area was estimated at 4000 km^2 during the LGM, stretching 132 km long at its maximum. An alpine-type landscape developed in the western region of the present lake, while a piedmont-type landscape developed in the eastern region post-LGM.
Fagnano paleoglacier accumulation and ablation areas (Coronato, et al 2009)
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