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Showing result 21 - 25 of 31 swedish dissertations matching the above criteria.

2. 21. Changing Landscapes : An Environmental History of Chibuene, Southern Mozambique

   Author : Anneli Ekblom; Paul Sinclair; Louis Scott; João Morais; Uppsala universitet; []
   Keywords : HUMANIORA; HUMANITIES; Archaeology; environmental history; archaeology; archaeobotany; paleoecology; vegetation history; pollen analysis; environmental management; environmental insecurity; resource utilisation; landscape; paleclimatology; trade; oral tradition; Mozambique; Vilanculos; Arkeologi; Archaeology subjects; Arkeologiämnen;

   Abstract : This thesis analyses the dynamics of environmental change and its embeddedness in the long term interactions of social history and rainfall variability through the building of an environmental history of the Chibuene locality, the coastal plain of southern Mozambique, 5 km south of the town Vilanculos, from 400 AD to present day. Land-use practices over time are discussed on the basis of vegetation and land-use history based pollen analysis, charcoal influx and diatom analysis. READ MORE

4. 22. Spatial distribution of snow in Antarctica and other glacier studies using ground-penetrating radar

   Author : Cecilia Richardson-Näslund; Robert W. Jacobel; Stockholms universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; GPR; ground-penetrating radar; radar soundings; snow accumulation; accumulation rate; spatial variability; Antarctica; Dronning Maud Land; cold surface layer; thermal regime; glacial cirques; Sweden; Antarktis; Glaciärer; Ackumulering av snö; Geography; Physical Geography; geografi med naturgeografisk inriktning;

   Abstract : The overall aim of this thesis is to develop and exemplify the use of ground-penetrating radar (GPR) within the field of glaciology. The main focus is on the spatial distribution of snow in Dronning Maud Land, East Antarctica. READ MORE

5. 23. Effects of habitat structure on tropical fish assemblages

   Author : Kajsa Garpe; Marcus Öhman; Geoffrey Jones; Stockholms universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Marine ecology; Marin ekologi; marin ekologi; Marine Ecology;

   Abstract : Rates of habitat alteration and degradation are increasing worldwide due to anthropogenic influence. On coral reefs, the loss of live coral reduces structural complexity while facilitating algal increase. In many coastal lagoons seagrass and corals are cleared to make room for cultivated macroalgae. READ MORE

6. 24. Remobilization of terrestrial carbon across temporal and spatial scales deduced from the Arctic Ocean sediment record

   Author : Jannik Martens; Örjan Gustafsson; Birgit Wild; Richard Pancost; Stockholms universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Arctic; climate change; permafrost; carbon; paleoclimate; Applied Environmental Science; tillämpad miljövetenskap;

   Abstract : Arctic warming is expected to trigger large-scale environmental change including remobilization of terrestrial organic carbon (terrOC). Permafrost and peatland systems contain more than twice as much carbon as the atmosphere, and may upon destabilization expose large amounts of their carbon to microbial decomposition and release climate-forcing greenhouse gases (GHG). READ MORE

7. 25. Glacial history of Northeast Greenland: cosmogenic nuclide constraints on chronology and ice dynamics

   Author : Lena Håkanson; Kvartärgeologi; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Jameson Land; Store Koldewey; Scoresby Sund; Ice dynamics; Glacial history; Cosmogenic; Greenland Ice Sheet;

   Abstract : The aim of this thesis was to use cosmogenic exposure dating to investigating whether highly weathered landscapes in the Northeast Greenland fjord zone have developed during prolonged ice free conditions or have been preserved beneath cold-based ice. Previous work along the Northeast Greenland coast has presented two conflicting hypotheses for the extent of the Greenland Ice Sheet during the last glacial maximum (LGM). READ MORE