9 documents found, page 1 of 1
A multi-embankment Chalcolithic walled enclosure
Texugo, André; Basílio, Ana Catarina; Pina, Pedro; Goyanes, Gabriel; Vieira, Gonçalo- Ota, a key part of the Chalcolithic walled enclosure phenomenon in Portuguese Estremadura, represents a unique settlement strategy within the actual territory of Portugal. The architecture and social dynamics of this site remained largely unexplored until 2019. This study marks a significant shift in its study, utilizing a synergistic approach of archaeology and geotechnologies, embodied in the using an Unman...
Microscale is key to model current and future Maritime Antarctic vegetation
Matos, Paula; Rocha, Bernardo; Pinho, Pedro; Miranda, Vasco; Pina, Pedro; Goyanes, Gabriel; Vieira, GonçaloDespite being one of the most pristine regions in the world, Antarctica is currently also one of the most vulnerable to climate change. Antarctic vegetation comprises mostly lichens and bryophytes, complemented in some milder regions of Maritime Antarctica by two vascular plant species. Shifts in the spatial patterns of these three main vegetation groups have already been observed in response to climate change,...
Microscale is key to model current and future Maritime Antarctic vegetation
Matos, Paula; Rocha, Bernardo; Pinho, Pedro; Miranda, Vasco; Pina, Pedro; Goyanes, Gabriel; Vieira, GonçaloDespite being one of the most pristine regions in the world, Antarctica is currently also one of the most vulnerable to climate change. Antarctic vegetation comprises mostly lichens and bryophytes, complemented in some milder regions of Maritime Antarctica by two vascular plant species. Shifts in the spatial patterns of these three main vegetation groups have already been observed in response to climate change,...
Deception Island 1967–1970 volcano eruptions from historical aerial frames and ...
Prates, Gonçalo; Torrecillas, Cristina; Berrocoso, Manuel; Goyanes, Gabriel; Vieira, GonçaloAbstract: Aerial frames and satellite imagery are widely recognized data sources from which to produce maps. For volcanoes, maps enable the quantification of erupted ash and the destruction caused. The last eruptive sequence on Deception Island was endured from 1967 to 1970. Analogue maps were produced via classical photogrammetric methods with a high degree of human intervention mainly to analyse the volcanic-...
Active layer and permafrost thermal regimes in the ice-free areas of Antarctica
Hrbáček, Filip; Oliva, Marc; Hansen, Christel; Balks, Megan; O'Neill, Tanya Ann; de Pablo, Miguel Angel; Ponti, Stefano; Ramos, Miguel; Vieira, GonçaloIce-free areas occupy <0.5% of Antarctica and are unevenly distributed across the continent. Terrestrial ecosystem dynamics in ice free areas are strongly influenced by permafrost and the associated active layer. These features are the least studied component of the cryosphere in Antarctica, with sparse data from permanent study sites mainly providing information related to the ground thermal regime and active ...
Deception Island 1967–1970 volcano eruptions from historical aerial frames and ...
Prates, Gonçalo; Torrecillas, Cristina; Berrocoso, Manuel; Goyanes, Gabriel; Vieira, GonçaloAerial frames and satellite imagery are widely recognized data sources from which to produce maps. For volcanoes, maps enable the quantification of erupted ash and the destruction caused. The last eruptive sequence on Deception Island was endured from 1967 to 1970. Analogue maps were produced via classical photogrammetric methods with a high degree of human intervention mainly to analyse the volcanic-centres ar...
Penultimate Glacial Cycle glacier extent in the Iberian Peninsula: new evidence...
Vieira, Gonçalo; Palacios, David; Andrés, Nuria; Mora, Carla; Vázquez Selem, Lorenzo; Woronko, Barbara; Soncco, Carmen; Úbeda, Jose; Goyanes, GabrielThe objective of this work is to present a first assessment on the age of the glacial features of the Serra da Estrela, in the central Portugal, Iberian Peninsula (40°19′ N, 7°37′ W, 1993 m), using Cosmic-Ray Exposure dating (in situ cosmogenic 36Cl). A total of 6 samples were dated, 4 extracted from exposed moraine boulders and 2 from glacially polished bedrock surfaces. Despite the low number of samples, the ...
Active layer monitoring in Antarctica: an overview of results from 2006 to 2015
Hrbáček, Filip; Vieira, Goncalo; Oliva, Marc; Balks, Megan; Guglielmin, Mauro; de Pablo, Miguel Ángel; Molina, Antonio; Ramos, Miguel; Goyanes, GabrielMonitoring of active layer thawing depth and active layer thickness (ALT), using mechanical pronging and continuous temperature data logging, has been undertaken under the Circumpolar Active Layer Monitoring – South (CALM-S) program at a range of sites across Antarctica. The objective of this study was to summarize key data from sites in different Antarctic regions from 2006 to 2015 to review the state of the a...
Study of current conditions of the active layer and top of permafrost of the em...
Goyanes, Gabriel; Yermolin, YevgeniyLa cabaña de Otto Nordenskjöld fue construida en 1902 en la isla Cerro Nevado, Antártida. La misma fue designada Sitio y Monumento Histórico Nº 38 por el tratado Antártico y Monumento Histórico Nacional por Decreto del Poder Ejecutivo Nacional (26/07/1965). Por ello nuestro país tomo la obligación de preservarla de la degradación natural a la que se encuentra sujeta. En este trabajo se presenta un relevamiento ...