INVESTIGADORES
CASELLI Alberto TomÁs
congresos y reuniones científicas
Título:
Permafrost and Active Layer Monitoring in the Maritime Antarctic: A contribution to TSP and ANTPAS projects
Autor/es:
VIEIRA G., RAMOS M., BATISTA V., CASELLI A., CORREIA A., Y OTROS
Lugar:
USA
Reunión:
Congreso; . American Geophysical Union Fall meeting.; 2009
Institución organizadora:
American Geophysical Union
Resumen:
Permafrost and active layer monitoring in the Maritime Antarctic (PERMANTAR) is a
Portuguese funded International Project that, in cooperation with the Spanish project
PERMAMODEL, will assure the installation and the maintenance of a network of
boreholes and active layer monitoring sites, in order to characterize the spatial
distribution of the physical and thermal properties of permafrost, as well as the
periglacial processes in Livingston and Deception Islands (South Shetlands). The
project is part of the International Permafrost Association IPY projects Thermal State of
Permafrost (TSP) and Antarctic and Sub-Antarctic Permafrost, Soils and Periglacial
Environments (ANTPAS). It contributes to GTN-P and CALM-S networks.
The PERMANTAR-PERMAMODEL permafrost and active layer monitoring network
includes several boreholes: Reina Sofia hill (since 2000, 1.1m), Incinerador (2000,
2.3m), Ohridski 1 (2008, 5m), Ohridski 2 (2008, 6m), Gulbenkian-Permamodel 1 (2008,
25m) and Gulbenkian- Permamodel 2 (2008, 15m). For active layer monitoring, several
CALM-S sites have been installed: Crater Lake (2006), Collado Ramos (2007), Reina
Sofia (2007) and Ohridski (2007). The monitoring activities are accompanied by
detailed geomorphological mapping in order to identify and map the geomorphic
processes related to permafrost or active layer dynamics. Sites will be installed in early
2009 for monitoring rates of geomorphological activity in relation to climate change
(e.g. solifluction, rockglaciers, thermokarst). In order to analyse the spatial distribution
of permafrost and its ice content, electrical resistivity tomography (ERT), and seismic
refraction surveys have been performed and, in early 2009, continuous ERT surveying
instrumentation will be installed for monitoring active layer evolution.
The paper presents a synthesis of the activities, as well as the results obtained up to the
present, mainly relating to ground temperature monitoring and from permafrost
characteristics and spatial distribution.