Search for dissertations about: "Environmental reconstruction"
Showing result 16 - 20 of 102 swedish dissertations containing the words Environmental reconstruction.
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16. Late Holocene spatiotemporal hydroclimatic variability over Fennoscandia inferred from tree-rings
Abstract : There is a broad scientific consensus that the global climate is changing, and that human activity is a significant factor contributing to the change. The response of the hydrological cycle to the warming is far reaching, including increases in the intensification and frequency of extreme hydroclimatological events. READ MORE
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17. Diatoms as indicators of Holocene climate and environmental change in northern Sweden
Abstract : The objective of the thesis was to explore the potential of diatoms (Bacillariophyceae) as indicators of Holocene climate and environmental change in northern Sweden (Abisko region, 68°21'N, 18°49'E). A modern surface-sediment calibration set including 100 lakes was developed and lake-water pH, sedimentary organic content (assessed by loss-on-ignition) and temperature were identified as most powerful environmental variables explaining the variance within the diatom assemblages. READ MORE
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18. Early Cambrian Problematic Lophotrochozoans and Dilemmas of Scleritome Reconstructions
Abstract : The emergence and radiation of metazoan body plans around the Precambrian/Cambrian boundary, some 500-600 million years ago, seems to be concordant with the appearance and diversification of preservable hard parts. Several Precambrian soft-bodied, multicellular organisms most likely represent stem-group bilaterians, but their fossil record is rather sparse. READ MORE
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19. Fast Radon Transforms and Reconstruction Techniques in Seismology
Abstract : The measurements conducted in tomography and seismology typically yield large multidimensional data sets. This in combination with the fact that the data may have an irregular structure makes it computationally prohibitive to use simple reconstruction methods directly. READ MORE
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20. Isotope-based reconstruction of the biogeochemical Si cycle : Implications for climate change and human perturbation
Abstract : The global silicon (Si) cycle is of fundamental importance for the global carbon cycle. Diatom growth in the oceans is a major sequestration pathway for carbon on a global scale (often referred to as the biological pump). READ MORE