Sökning: "winter site"

Visar resultat 21 - 25 av 54 avhandlingar innehållade orden winter site.

  1. 21. Snow quality in urban areas

    Författare :Maria Viklander; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; VA-teknik; Urban Water Engineering;

    Sammanfattning : The studies reported on this thesis aim to provide information and increase knowledge about the quality of urban snow and the path of pollutants. The results develop a basis for decisions regarding the prevention of environmental damage. LÄS MER

  3. 22. Road runoff quality in cold climates

    Författare :Camilla Westerlund; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; VA-teknik; Urban Water Engineering;

    Sammanfattning : The main objective of the doctoral thesis was to investigate the complex processes and influencing factors affecting snowmelt-induced runoff and snowmelt quality in a cold climate under wintry conditions compared to non- winter conditions in areas with a warmer climate. In order to improve the understanding and knowledge of road-runoff quantity, quality and pollutant transport, snowmelt and rainfall runoff were studied and characterized in the laboratory and in the field, respectively. LÄS MER

  4. 23. Disentangling production and climate signals from high-resolution Beryllium records: implications for solar and geomagnetic reconstructions

    Författare :Minjie Zheng; MERGE: ModElling the Regional and Global Earth system; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Solar Activity; 10Be; 7Be; ice cores; tropopause; climate; cosmogenic radionuclides; geomagnetic reconstructions; multi-linear regression;

    Sammanfattning : The sun is the most important energy source for the Earth’s climate system, however, influences of solar variations on climate are not fully understood. Studying past solar activity can improve our understanding of what role the sun plays in Earth’s climate. LÄS MER

  5. 24. Born in fire, borne by air : Source attribution and physicochemical characterization of ship and ambient aerosols in the Baltic region

    Författare :Stina Ausmeel; MERGE: ModElling the Regional and Global Earth system; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; anthropogenic air pollution; aerosol; black carbon; plumes; ship emissions; absorption; source apportionment; climate; Fysicumarkivet A:2020:Ausmeel;

    Sammanfattning : Aerosol emissions from anthropogenic activities cause detrimental health effects and affect the climate system. Combustion is a large source of airborne fine particulate matter (PM2.5) and the uncertainties of the climate role of these emissions are still large. LÄS MER

  7. 25. Från Döudden till Varghalsen : en studie av kontinuitet och förändring inom ett fångstsamhälle i övre Norrlands inland, 5200 f.Kr. - 400 e.Kr

    Författare :Ingela Bergman; Umeå universitet; []
    Nyckelord :HUMANIORA; HUMANITIES; Hunter-gatherer; Lappland; northern Sweden; Late Mesolithic; Neolithic; Bronze Age; early Iron Age; settlement sites; hunting pits; seasonal mobility; logistically organized; settlement patterns; spatial analysis; Jägare samlare-- Sverige -- Lappland; Bosättningar-- Sverige -- Lappland; Arjeplog;

    Sammanfattning : This thesis is an investigation of a prehistoric hunter-gatherer society in Arjeplog, Lappland, northern Sweden, with regard to changes in the subsistence strategies and social organization. Chronologically, the archeological record dates from 5200 BC to 400 AD. LÄS MER