Search for dissertations about: "climate reconstruction"

Showing result 1 - 5 of 45 swedish dissertations containing the words climate reconstruction.

  1. 1. Reconstruction of Past European Land Cover Based on Fossil Pollen Data : Gaussian Markov Random Field Models for Compositional Data

    University dissertation from Lund University, Faculty of Science, Centre for Mathematical Sciences, Centre for Environmental and Climate Research

    Author : Behnaz Pirzamanbein; Lunds universitet.; Lund University.; Lunds universitet.; Lund University.; Lunds universitet.; Lund University.; Lunds universitet.; Lund University.; [2016-11]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Spatial Statistics; Adaptive Markov Chain Monte Carlo; Dirichlet Observation; Confidence Region; Palaeoecology; Past Human Land Use; Stochastic Partial Differential Equation;

    Abstract : Spatial distribution of land cover plays an important role in climate system andglobal carbon cycle. Research shows that changes in land cover are associated with large climatic effects. These changes are either due to climate change or human activities. READ MORE

  2. 2. Intramolecular isotope analysis reveals plant ecophysiological signals covering multiple timescales

    University dissertation from Umeå : Umeå Universitet

    Author : Thomas Wieloch; Umeå universitet.; [2019]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NMR spectroscopy; tree ring; isotope ratio; isotope effect; intramolecular 13C 12C signal; carbon allocation; acclimation; plant performance; climate reconstruction; plant ecophysiology;

    Abstract : Our societies' wellbeing relies on stable and healthy environments. However, our current lifestyles, growth-oriented economic policies and the population explosion are leading to potentially catastrophic degradation of ecosystems and progressive disruption of food chains. READ MORE

  3. 3. Deglacial impact of the Scandinavian Ice Sheet on the North Atlantic climate system

    University dissertation from Stockholm : Department of Geological Sciences

    Author : Francesco Muschitiello; Stockholms universitet.; [2016]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; climate; North Atlantic; last deglaciation; isotope geochemistry; chronology; climate modeling; maringeologi; Marine Geology;

    Abstract : The long warming transition from the Last Ice Age into the present Interglacial period, the last deglaciation, holds the key to our understanding of future abrupt climate change. In the last decades, a great effort has been put into deciphering the linkage between freshwater fluxes from melting ice sheets and rapid shifts in global ocean-atmospheric circulation that characterized this puzzling climate period. READ MORE

  4. 4. Interactions between climate, natural disturbances, and regeneration in boreal and hemi-boreal forests

    University dissertation from Section of Plant Ecology and Systematics, Ekologi Huset, S-223 62 Lund, Sweden

    Author : Igor Drobyshev; Lunds universitet.; Lund University.; [2004]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; conservation strategies; Plant ecology; Växtekologi; taiga; seasonal climate; shoot increment; larch; reconstruction; human; canopy gap; fire history; boreal; natural disturbances; dendrochronology;

    Abstract : Popular Abstract in Swedish Naturliga störningsregimer är viktiga drivkrafter i vegetationsdynamiken hos de flesta skogstyper jorden runt. Att förstå de rumsliga och tidsmässiga egenskaperna i störningarna, såväl i nutid som i förfluten tid, är viktigt bl a vid utformningen av strategier för naturvård, likväl som för att kunna modellera inflytandet av klimat och människans påverkan. READ MORE

  5. 5. A palaeolimnological study of the anthropogenic impact on dissolved organic carbon in South Swedish lakes

    University dissertation from Centre for Environmental and Climate Research, Lund University

    Author : Petra Bragée; Lunds universitet.; Lund University.; Lunds universitet.; Lund University.; Lunds universitet.; Lund University.; [2013]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; DOC; Brownification; Landscape Reconstruction Algorithm; Land-use changes; Lake sediments; Anthropogenic impact;

    Abstract : Popular Abstract in Swedish De senaste ca trettio åren har man observerat en kraftig ökning av löst organiskt kol i sjöar, vattendrag och kustnära vatten i olika delar av det norra halvklotet, bl.a. i delar av Nordamerika, Storbritannien, Baltikum, centrala Europa och Skandinavien. READ MORE