Sökning: "ice growth"

Visar resultat 1 - 5 av 46 avhandlingar innehållade orden ice growth.

  1. 1. Breaking the ice effects of ice formation and winter floods on vegetation along streams

    Detta är en avhandling från Umeå : Umeå universitet

    Författare :Lovisa Lind; Umeå universitet.; [2015]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; anchor ice; climate change; in-stream; riparian; river ice; streams; vegetation;

    Sammanfattning : Streams in cold regions are characterized by unique hydrological processes that control flow regime and water levels. One of the most important processes is the formation, growth and melting of different types of ice in and around the stream channel during winter. LÄS MER

  2. 2. Tensile fracture of ice test methods and fracture mechanics analysis

    Detta är en avhandling från Luleå : Luleå tekniska universitet

    Författare :Lars Stehn; Luleå tekniska universitet.; [1993]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Structural Engineering; Konstruktionsteknik;

    Sammanfattning : This thesis is concerned with several aspects of fracture of both brackish (low salinity) sea ice and freshwater ice. The tests and analyses are confined to tensile, or in fracture mechanics language, Mode I, fracture. LÄS MER

  3. 3. Molecular investigations of atmospherically relevant interface processes: ice formation and water accommodation on ice and organic surfaces

    Detta är en avhandling från Luleå : Luleå tekniska universitet

    Författare :Xiangrui Kong; Göteborgs universitet.; Gothenburg University.; [2014]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; atmosphere; kinetics; Environmental molecular beam; ice nucleation; supersaturation; accommodation coefficient; phase transition; alcohols; green chemistry;

    Sammanfattning : Clouds and aerosols play important roles in the climate system by affecting on atmospheric chemistry, the radiation budget of the atmosphere, and the water cycle including the formation of precipitation. Climate models with predictive power require quantitative descriptions of aerosols and clouds, but several key processes remain to be fully understood. LÄS MER

  4. 4. Numerical modelling of the Cordilleran ice sheet

    Detta är en avhandling från Stockholm : Department of Physical Geography and Quaternary Geology, Stockholm University

    Författare :Julien Seguinot; Stockholms universitet.; [2014]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Numerical modelling; Cordilleran ice sheet; last glacial cycle; Physical Geography; naturgeografi;

    Sammanfattning : This doctoral dissertation presents a study of the glacial history of the North American Cordillera using numerical ice sheet modelling calibrated against field evidence. This area, characterized by the steep topography of several mountain ranges separated by large inter-montane depressions, was once covered by a large-scale ice mass: the former Cordilleran ice sheet. LÄS MER

  5. 5. Frazil ice at water intakes

    Detta är en avhandling från Luleå : Luleå tekniska universitet

    Författare :Annika Andersson; [1997]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Applied Geology; Tillämpad geologi;

    Sammanfattning : To provide a better understanding of how frazil ice deposits on trash racks at water intakes, the phenomenon was video recorded at two hydropower plants and in a refrigerated laboratory flume. Initial accretion of frazil ice around a single bar and the motion of particles in the vicinity of an obstacle was simulated through numerical modelling and studied using plastic particles in a laboratory flume. LÄS MER