Search for dissertations about: "ground ice"

Showing result 1 - 5 of 37 swedish dissertations containing the words ground ice.

  1. 1. Spin ice under uniaxial pressure and magnetic frustration in garnets

    Author : Richard Edberg; Patrik Henelius; Santiago A. Grigera; KTH; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; magnetism; fysik; spin is; frustrerad magnetism; värmekapacitet; heat capacity; spin ice; physics; magnetism; Material and Nano Physics; Material- och nanofysik;

    Abstract : Frustration is the inability to simultaneously satisfy all interactions. The interest in magnetic frustration has grown during the last decades. The research has among other findings been promoted by the discovery of spin ice which is a frustrated magnetic compound with an exotic ground state and unusual excitations. READ MORE

  2. 2. Cold-climate landforms on Mars and Earth-analogues in Svalbard

    Author : Andreas Johnsson; Göteborgs universitet; Göteborgs universitet; Gothenburg University; []
    Keywords : Mars; Svalbard; Spitsbergen; periglacial; ice; permafrost; Earth-analogues; terrestrial analogues; geomorphology; landforms; solifluction; debris flow; gully; craters; cold-climate;

    Abstract : Periglacial landforms on Earth reflect cold-climate conditions and are intimately related to processes due to the presence of ground ice and perennially frozen ground, permafrost. The overall objective of this thesis is to investigate the potential of Svalbard as an analogue to Mars cold-climate landforms, and explore past and present processes and surface conditions on Mars by inference from morphological counterparts in Svalbard. READ MORE

  3. 3. Sea Ice and Ocean Environmental Applications of Spaceborn SAR

    Author : Sverre Thune Dokken; Chalmers University of Technology; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Radarsat; SSM I; ERS-1 2; ocean applications; sea ice applications; numerical models; SAR; Arctic Ocean; Envisat; climate change;

    Abstract : The worldwide focus on our changing environment has led to an increased need to observe and characterise a range of environmental phenomena. The Arctic Ocean is particularly sensitive to climate variations. READ MORE

  4. 4. Ground freeze-thaw, snow and roads in northern Sweden

    Author : Maria Sarady; Eva Sahlin; Magnus Bohlin; Hanna Ridefelt; Uppsala universitet; []
    Keywords : SOCIAL SCIENCES; SAMHÄLLSVETENSKAP; Ground freeze-thaw; snow depth; roads; northern Sweden; geography; Geography; Geografi;

    Abstract : In this thesis freeze-thaw along roads in northern Sweden is examined. The examinations are put in a context of changing climate and its amplification towards the Arctic region on earth. The research focuses on the impact of a warmer climate on ground freeze-thaw and in exten- sion road maintenance in the region. READ MORE

  5. 5. Contribution to Wideband SAR Space-Time Processing, and Radar Remote Sensing of Sea Ice

    Author : Mats I. Pettersson; Chalmers University of Technology; []
    Keywords : SAR; clutter suppression; space time adaptive processing; backprojection; remote sensing; moving target detection; radar scattering; Antenna array; wide band; sea ice;

    Abstract : Synthetic Aperture Radar (SAR) has the capability to map the Earth with high resolution and is used in both civilian and military applications. The development of SAR systems is going towards higher resolution. Today there are Wide Band (WB) SAR instruments that have a resolution actually smaller than the operating wavelength. READ MORE