Sökning: "avdunstning"

Visar resultat 1 - 5 av 15 avhandlingar innehållade ordet avdunstning.

  1. 1. Avdunstning och molekyler : en longitudinell studie av hur grundskoleelever utvecklar sina uppfattningar om avdunstningsfenomen

    Författare :Ann-Charlotte Lindner; Andreas Redfors; Mats Lindahl; Frank Bach; Högskolan i Kalmar; []
    Nyckelord :SOCIAL SCIENCES; SAMHÄLLSVETENSKAP; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Ämnesdidaktik; Naturvetenskap; Grundskolan; Molekyler; Avdunstning; Education; Pedagogik; Science Education; Naturvetenskap med utbildningsvetenskaplig inriktning; SOCIAL SCIENCES; SAMHÄLLSVETENSKAP;

    Sammanfattning : This thesis presents results from a longitudinal study of students in compulsory school. The project started in spring 1997 when the students were about six years old, and finished in spring 2006 when they left compulsory school. LÄS MER

  2. 2. Disinformative and Uncertain Data in Global Hydrology : Challenges for Modelling and Regionalisation

    Författare :Anna Kauffeldt; Sven Halldin; Allan Rodhe; Chong-Yu Xu; András Bárdossy; Uppsala universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Data uncertainty; Discharge; Disinformative data; Evaporation; Flow-duration curve; Global hydrology; Neural networks; Numerical weather prediction; Precipitation; Quality control; Regionalisation; Ungauged basins; Water balance; Avdunstning; avrinningsområden utan vattenföringsdata; dataosäkerhet; desinformativa data; global hydrologi; kvalitetskontroll; nederbörd; neurala nät; numerisk vädermodell; regionalisering; varaktighetskurva; vattenbalans; vattenföring; Hydrology; Hydrologi;

    Sammanfattning : Water is essential for human well-being and healthy ecosystems, but population growth and changes in climate and land-use are putting increased stress on water resources in many regions. To ensure water security, knowledge about the spatiotemporal distribution of these resources is of great importance. LÄS MER

  3. 3. Med kroppen som illustration : Hur förskolebarn prat-skapar naturvetenskap med hjälp av multimodala och kroppsförankrade förklaringar

    Författare :Anneli Bergnell; Lisbeth Åberg-Bengtsson; Ann-Katrin Svensson; Högskolan i Borås; []
    Nyckelord :SOCIAL SCIENCES; SAMHÄLLSVETENSKAP; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; preschool science education multimodality the concepts of stability; evaporation and water-cycle of the world talking science embodied illustrations förskolan naturvetenskap multimodala och kroppsförankrade illustrationer stabilitet; avdunstning; vattnets kretslopp prat-skapa naturvetenskap;

    Sammanfattning : The aim of this thesis is to combine three research areas, namely preschool, science and illustrations, in order to examine (a) how modes are combined when references to the body are made or the body as such are used to explain scientific concepts and phenomena in preschool science education, and (b) how do the children handle, explore, discuss and talk science when approaching multimodally illustrated scientific contents in the studied activities. Four studies were conducted, all of which were built on empirically generated questions and were theoretically grounded in cultural-historical and multimodal perspectives. LÄS MER

  4. 4. Evaporation and Heat-flux Aggregation in Heterogeneous Boreal Landscapes

    Författare :Tony Persson; Sven Halldin; Dimitris Melas; Deliang Chen; Uppsala universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Hydrology; land-surface processes; heterogeneity; surface fluxes; soil-water content; high latitudes; snow; lakes; climate; mesoscale model; NOPEX; WINTEX; Hydrologi; Hydrology; Hydrologi;

    Sammanfattning : The boreal forests represent 8 % of all forested areas on the earth and have a significant role in the control of greenhouse gases and an impact on global climate change. The main objective of this thesis is to increase the understanding of how evaporation and heat-flux processes in the boreal forest zone are affecting the regional and global climate. LÄS MER

  5. 5. Coupled processes in seasonally frozen soils : Merging experiments and simulations

    Författare :Mousong Wu; Per-Erik Jansson; Bjorn Klove; KTH; []
    Nyckelord :AGRICULTURAL SCIENCES; LANTBRUKSVETENSKAPER; LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; Frozen soil; Coupled transport; Energy balance; Uncertainties; Merged study; 冻土;水热盐运移;耦合关系;水热平衡;不确定性; Land and Water Resources Engineering; Mark- och vattenteknik;

    Sammanfattning : Soil freezing/thawing is of importance in the transport of water, heat and solute, with coupled effects. Due to complexity in soil freezing/thawing, uncertainty could be influential in both experimentation and simulation work in frozen soils. LÄS MER