Sökning: "hur gammal är jorden"

Visar resultat 1 - 5 av 7 uppsatser innehållade orden hur gammal är jorden.

  1. 1. Total carbon sequestration during an entire rotation period of oil palm in northern Borneo

    Master-uppsats, SLU/Dept. of Forest Ecology and Management

    Författare :Josefin Runesson; [2019]
    Nyckelord :oil palm; carbon balance; carbon sequestration; land use change; soil carbon; carbon credits;

    Sammanfattning : Considerable amounts of carbon (C) has been lost from tropical forests as a result of continuous conversion of tropical forests into oil palm plantations. Therefore, a better understanding of the C budget and potential sequestration rate in oil palm plantations and how it compares to natural forests is needed. LÄS MER

  3. 2. Wind impact on sea ice motion in the Arctic

    Kandidat-uppsats, Lunds universitet/Fysiska institutionen; Lunds universitet/Förbränningsfysik

    Författare :Klara Matsson; [2016]
    Nyckelord :Physics and Astronomy;

    Sammanfattning : In order to examine how the wind at 10 m above the surface influences the sea ice motion in the Arctic Ocean, a correlation coefficient between wind and ice drift, an angle between wind direction and ice velocity and a reduction factor of the ice speed relative to the wind speed were calculated, using statistical methods. This was done on a 10 km by 10 km grid, for both winter, January to March, and summer, July to September, with data from 2014 and 2015. LÄS MER

  4. 3. Deponigas - Mätmetoder för utsläpp och passiva gashanteringssystem. Med fältstudie på tre äldre nedlagda deponier

    Uppsats för yrkesexamina på avancerad nivå, Lunds universitet/Miljö- och energisystem; Lunds universitet/Ekosystemteknik (CI)

    Författare :Ida Arvidsson; [2016]
    Nyckelord :Deponigas; metanoxidation; passiv deponigashantering; metanutsläpp; fluxbox; Technology and Engineering;

    Sammanfattning : Landfill gas is produced in all landfills containing organic material. Landfill gas consists of mainly methane and carbon dioxide. Methane is a potent greenhouse gas which can be explosive and inflammable. Landfill gas can be collected and used as fuel, for instant for heating. LÄS MER

  5. 4. Arboga Mekaniska Verkstad : Förslag på saneringsåtgärder gällande gjuteriet och plåtverkstaden

    Kandidat-uppsats, Akademin för hållbar samhälls- och teknikutveckling

    Författare :Sandra Petterson; Ulrika Vinberg; [2009]
    Nyckelord :metal contaminated soils; metal contaminated building; cultural center; concert hall; warehouse; metal decontamination; environmental; environmental impact; metallförorenad mark; metallförorenad byggnad; kulturcentrum; konserthall; lagerlokal; metallsanering; miljömål; miljökonsekvensbeskrivning;

    Sammanfattning : The industrialization in Sweden has increased the large number of areas that have been contaminated with various types of pollution. One of those sites are the property Höjen 3:24 in Arboga where “Arboga Mekaniska Verkstad” once been. LÄS MER

  7. 5. Extraterrestrisk och terrestrisk kromrik spinell i fanerozoiska kondenserade sediment

    Magister-uppsats, Lunds universitet/Geologiska institutionen

    Författare :Maria Nolvi; Gunilla Thorelli; [2006]
    Nyckelord :physical geography; condensed sediments; cyclic sedimentation; spherules; chrome spinels; extraterrestrial chromite; cyklisk sedimentation; kondenserade sediment; sfäruler; kromspineller; geomorphology; pedology; cartography; climatology; naturgeografi; geomorfologi; marklära; kartografi; klimatologi; extraterrestrisk kromit; Earth and Environmental Sciences;

    Sammanfattning : This study aims to assess the normal inflow of extraterrestrial chromite to Earth. The results from the investigation are compared to earlier studies of middle Ordovician Orthoceratite Limestone in which 1 - 3 extraterrestrial chromite grains ( >63 ƒÊm ) per kilogram limestone were found. LÄS MER