Sökning: "ice break-up"

Visar resultat 1 - 5 av 6 avhandlingar innehållade orden ice break-up.

1. 1. Phytoplankton response to a changing climate in lakes in northern Sweden

   Författare :Jennie Sandström; Nils Ekelund; Hugo von Zeipel; Mittuniversitetet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Climate change; cyanobacteria; ice break-up; oligotrophic lakes; phytoplankton; temperature;

   Sammanfattning : In a climate change perspective, increased air temperatures are already a reality and are expected to increase even more in the future, especially in areas at high latitudes. The present thesis therefore addresses the influence of climate change on the physical properties and the phytoplankton communities of typical small and oligotrophic lakes in northern Sweden (62-64˚N). LÄS MER

3. 2. Ice Sheet, Climate, and Landscape Interactions in Dronning Maud Land, Antarctica

   Författare :Jens-Ove Näslund; Sugden David; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Antarctica; Basal temperature; Dronning Maud Land; Erosion; Escarpments; Glacial landforms; Ice Sheets; Ice sheet modelling; Landscape development; Palaeosurfaces; Radar; Other earth sciences; Övrig geovetenskap; naturgeografi; Physical Geography;

   Sammanfattning : The impact of glaciers and ice sheets on the subglacial landscape are of fundamental importance for studies of glacial history and landscape development, both in previously glaciated areas and in areas that are glaciated today. The thesis concerns the present and past erosive capacity of the ice sheet in Dronning Maud Land, East Antarctica. LÄS MER

4. 3. Characterizing and reconstructing 500 years of climate in the Baltic sea Basin

   Författare :Christin Eriksson; Göteborgs universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Climate; Sea ice; Baltic Sea; Atmospheric circulation; Statistical modelling; Wavelet; River runoff;

   Sammanfattning : Climate has always attracted considerable interest, and climate observations have been made in various ways for most of human history. Regional climate and how it varies is of particular interest, as it sets the scene for our everyday life. LÄS MER

5. 4. Experimental Investigation of Cavitation-Bubble-Induced Atomization

   Författare :Jiayi Zhou; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; cavitation bubble; liquid atomization; shadowgraph;

   Sammanfattning : Improving the efficiency and lowering the emissions of internal combustion engines (ICE) has been drawing increased attention because climate change caused by greenhouse gases and the need to reduce emission harmful to human health, and stricter legislation on the emissions from liquid-fueled transportation is implemented. Design of the liquid fuel atomizer, which atomizes the fuel delivered into the combustion chamber by the fuel injection system, is important because a good atomization, which facilitates the evaporation of fuel and improves the fuel-air mixture, leads to higher efficiency and lower emissions of ICE. LÄS MER

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

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

   Sammanfattning : 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. LÄS MER