A5000800870- Climate change and permafrost
- Cryospheric studies and observations
- Arctic and Antarctic ice dynamics
- Geology and Paleoclimatology Research
- Landslides and related hazards
- Polar Research and Ecology
University of Lisbon
2017-2020
Universidad de Alcalá
2016-2020
Magnetic clouds (MCs) are closed magnetic structures embedded in interplanetary coronal mass ejections (ICMEs). They have physical interest by their own, and, more recently, Earth magnetosphere effects.Data from the period 2008-2014 Stereo A and B (MAG, PLASTIC SWEA PAD sensors) different ICME catalogues been used to elaborate an exhaustive list of MCs.To establish boundaries those  MCs we six criteria, like a low-beta plasma or higher field intensity than values calm solar wind...
The heliospheric current sheet (HCS) is observed as a sector boundary in the ecliptic plane, and its orientation structure have been intensely studied. It divides heliosphere into regions with opposite magnetic polarities. Analysis of local at 1 AU let to study HCS directional discontinuity supported by (CS).HYTARO+ an analytical model development evaluate influence solar dipole topology HCS. Using multipole expansion, HYTARO+ analyzes contribution dipolar quadrupolar field deepens...
The study of the thermal behavior permafrost and active layer on South Shetland Islands, in western side Antarctic Peninsula (Antarctica), has been our research topic since 1991, especially after 2006 when we established different thickness ground monitoring sites CALM GTN-P international networks International Permafrost Association. Along this period, snow cover did not change at those sites, but 2010, observed an elongation duration, with similar onset, a delay offset. Due to important...
Since 2006, our research team has been establishing in the islands of Livingston and Deception, (South Shetland archipelago, Antarctica) several monitoring stations active layer thickness within international network Circumpolar Active Layer Monitoring (CALM), ground thermal regime for Ground Terrestrial Network-Permafrost (GTN-P). Both networks were developed International Permafrost Association (IPA). In GTN-P stations, addition to temperature air, soil, terrain at different depths, snow...
The Antarctic Peninsula (AP) region has been one of the regions on Earth with strongest warming since 1950. However, northwest AP showed a cooling from 2000 to 2015, which had local consequences an increase in snow accumulation and deceleration loss mass glaciers. In this paper, we studied effects increased permafrost thermal regime two boreholes (PG1 PG2) Livingston Island, South Shetlands Archipelago, 2009 2015. located c. 300 m apart but at similar elevation different accumulation, PG2...
Abstract. The mountainous and ice-free terrains of the maritime Antarctic generate complex mosaics snow patches, ranging from tens to hundreds metres. These can only be accurately mapped using high-resolution remote sensing. In this paper we evaluate application radar scenes TerraSAR-X in High Resolution SpotLight mode for mapping patches at a test area on Fildes Peninsula (King George Island, South Shetlands). Snow-patch characterization stratigraphy were conducted time image acquisition 12...
Abstract. Snow patch distribution and snow melt patterns during the summer are important controls for terrestrial ecosystems, permafrost active layer, as well infrastructure access management in Maritime Antarctic. The mountainous terrain of Antarctic relatively small extent ice-free areas generate complex mosaics numerous snow-patches, ranging from tens to hundreds meters extension. These can only be accurately mapped using high resolution remote sensing sensors. However, extremely number...