Sökning: "Physical Geography"

Visar resultat 1 - 5 av 372 avhandlingar innehållade orden Physical Geography.

  1. 1. Studies in Glacier Mass Balance Measurement and its errors

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

    Författare :Andrew Mercer; Peter Jansson; Gunhild Rosqvist; Ian Brown; Jonathan Carrivick; [2018]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Glaciology; Mass Balance; Measurement Errors; naturgeografi; Physical Geography;

    Sammanfattning : The study of the surface mass balance of valley glaciers has a long history but one that is dogged by uncertainty and errors, and uncertainty about those errors. These problems are acknowledged by the glaciological community and have been examined and formalised in several publications. LÄS MER

  2. 2. Leaf Area Index of Scandinavian Forests Methods Using in situ and Remotely Sensed Data

    Detta är en avhandling från Department of Physical Geography and Ecosystem Science, Lund University

    Författare :Helena Eriksson; [2007]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Geologi; fysisk geografi; Physical geography; geomorphology; Geology; physical geography; leaf aggregation; specific leaf area SLA .; Växtekologi; Plant ecology; Leaf area index LAI ; canopy reflectance models; spectral vegetation indices; remote sensing; pedology; cartography; climatology; Fysisk geografi; geomorfologi; marklära; kartografi; klimatologi;

    Sammanfattning : This thesis deals with methods of obtaining the leaf area index (LAI) from remotely sensed satellite data. Initially, in situ estimation methods were investigated, since the accuracy of the remotely sensed estimates is dependent on the quality of these estimates. LÄS MER

  3. 3. Relationships between Atmospheric Circulation and Wind Erosion in Southern Sweden and Australia

    Detta är en avhandling från Marie Ekström, Dept. of Phys. Geog. and Ecos. Anal., V-huset John Ericssons väg 1, 2nd floor

    Författare :Marie Ekström; [2002]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; pedology; cartography; climatology; Fysisk geografi; geomorfologi; marklära; kartografi; klimatologi; Physical geography; geomorphology; Geologi; fysisk geografi; physical geography; Geology; sea level pressure; atmospheric circulation; erosivity; wind erosion; wind climatology; Scania; Australia;

    Sammanfattning : Wind erosion is a serious threat to soil resources as it causes depletion of the fine fractions that may result in a less fertile soil. Wind erosion encompasses several processes of which many are related to climate variables. To date, there is little work performed on how wind erosion relates to climate and climate change. LÄS MER

  4. 4. Primary Production in African Drylands : Quantifying Supply and Demand Using Earth Observation and Socio-ecological Data

    Detta är en avhandling från Lund University, Faculty of Science, Department of Physical Geography and Ecosystem Science

    Författare :Abdulhakim Abdi; [2017-02]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Net Primary Production NPP ; Africa; Drylands; Coupled Human and Natural Systems; Human-Environment Relations; Food; Fuel; Feed; Earth Observation; Remote Sensing; Biomass; Carbon; Supply and Demand;

    Sammanfattning : The human-environment connection in the mostly rural drylands of sub-Saharan Africa forms a complex, interlinked system that provides ecosystem services. This system is susceptible to climatic variability that impacts the supply of its products, and high population growth, which impacts the demand for these products. LÄS MER

  5. 5. Life paths through space and time: Adding the micro-level geographic context to longitudinal historical demographic research

    Detta är en avhandling från Lund University, Faculty of Science, Department of Physical Geography and Ecosystem Science

    Författare :Finn Hedefalk; [2016-10]
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; HUMANIORA; HUMANITIES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Geographic micro-level factors; longitudinal historical data; geocoding; historical demography; 19th century; individual level; spatio-temporal analysis; detailed geographic data; geographic context.; property units; rural historical soceties; Geographic micro-level factors; longitudinal historical data; geocoding; historical demography; 19th century; individual level; spatio-temporal analysis; detailed geographic data; property units; geographic context;

    Sammanfattning : Historical demographic research is central to understanding past human behaviours and traits, such as fertility, mortality and migration. An essential part of historical demography is conducting longitudinal analyses at the micro-level, which involves the detailed follow-up of individuals over long time periods throughout their lives. LÄS MER