Search for dissertations about: "Past climates"

Showing result 1 - 5 of 7 swedish dissertations containing the words Past climates.

  1. 1. Atmospheric dynamics and the hydrologic cycle in warm climates

    University dissertation from Stockholm : Department of Meteorology, Stockholm University

    Author : Henrik Carlson; Stockholms universitet.; [2018]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; superrotation; early Eocene; warm climates; Madden-Julian Oscillation; the hydrologic cycle; vegetation sensitivity; large-scale circulation; Atmospheric Sciences and Oceanography; atmosfärvetenskap och oceanografi;

    Abstract : Past warm climates represent one extreme of Earth's known climate states. Here, we study warm climates in both idealized simulations and full-complexity general circulation model (GCM) simulations of the early Eocene epoch, approximately 50 million years ago. READ MORE

  2. 2. High-resolution simulations of two cold palaeo climates in Europe MIS 3 and LGM

    University dissertation from Stockholm : Department of Meteorology, Stockholm University

    Author : Gustav Strandberg; Stockholms universitet.; [2015]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Palaeo climate; climate modelling; proxy data; LGM; MIS 3; meteorologi; Meteorology;

    Abstract : The study of past climate is important because it increases our understanding of how the climate system works. Past climate is often reconstructed by using proxies (that is observations of things that tell something about past climate, for example tree rings, pollen in lake sediments and fossils). READ MORE

  3. 3. Lipid biomarkers and other geochemical indicators in paleoenvironmental studies of two Arctic systems a Russian permafrost peatland and marine sediments from the Lomonosov Ridge

    University dissertation from Stockholm : Department of Geological Sciences, Stockholm University

    Author : Rina Argelia Andersson; Stockholms universitet.; [2012]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; lipid biomarkers; peat; permafrost; Arctic Ocean; marine sediments; geokemi; Geochemistry;

    Abstract : The reconstruction of past environmental conditions is a fascinating research area that attracts the interest of many individuals in various geological disciplines. Paleoenvironmental reconstruction studies can shed light on the understanding of past climates and are a key to the prediction of future climate changes and their consequences. READ MORE

  4. 4. Modelling the early to mid-Holocene Arctic climate

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Marit Berger; KTH.; [2013]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Arctic; early Holocene; mid-Holocene; climate modelling; paleoclimate; sea ice; climate change;

    Abstract : In the recent past it has become evident that the Earth's climate is changing, and that human activity play a significant role in these changes. One of the regions where the ongoing climate change has been most evident is in the Arctic: the surface temperature has increased twice as much in this region as compared to the global average, in addition, a significant decline in the Arctic sea-ice extent has been observed in the past decades. READ MORE

  5. 5. Seed dormancy and germination in an ecological context : comparative studies of annual weeds

    University dissertation from Institutionen för fysik, kemi och biologi

    Author : Laila Karlsson; Linköpings universitet.; Linköpings universitet.; [2007]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Asteraceae; Bidens; Compositae; deadnettle; Galinsoga; germination timing; Guizotia; evolution; Labiatae; Lamiaceae; Lamium; morphophysiological dormancy; Papaveraceae; Papaver; Parthenium; physiological dormancy; poppy; summer annual; Tagetes; Verbesina; winter annual; NATURAL SCIENCES Biology; NATURVETENSKAP Biologi;

    Abstract : Germination ecology studies, i.e. studies of interactions between characteristics of the seeds and environmental circumstances, provide understanding of spatial and temporal patterns of emergence of wild species, as weeds in the field. A large number of species have seed dormancy, i. READ MORE