Search for dissertations about: "last glacial cycle"

Showing result 1 - 5 of 11 swedish dissertations containing the words last glacial cycle.

2. 1. Northern Permafrost Region Soil Carbon Dynamics since the Last Glacial Maximum : a terrestrial component in the glacial to interglacial carbon cycle

   Author : Amelie Lindgren; Gustaf Hugelius; Peter Kuhry; Fortunat Joos; Stockholms universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Soil organic carbon; Permafrost; Peat; Loess; Vegetation; Biome reconstruction; Last Glacial Maximum; Deglaciation; Glacial-interglacial cycle; Carbon cycle; Physical Geography; naturgeografi;

   Abstract : At the Last Glacial Maximum (LGM), after ~100,000 years of relatively cold temperatures and progressively lower atmospheric carbon dioxide (CO2) concentrations, CO2 levels reached ~180 ppm, which is less than half of what we see today in a much warmer world (~400 ppm). Although much of this increase since the LGM is due to human-induced emissions, about 100 ppm of this increase can be attributed to natural variations seen over glacial to interglacial cycles. READ MORE

4. 2. Numerical modelling of the Cordilleran ice sheet

   Author : Julien Seguinot; Arjen Stroeven; Shawn Marshall; Stockholms universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Numerical modelling; Cordilleran ice sheet; last glacial cycle; Physical Geography; naturgeografi;

   Abstract : This doctoral dissertation presents a study of the glacial history of the North American Cordillera using numerical ice sheet modelling calibrated against field evidence. This area, characterized by the steep topography of several mountain ranges separated by large inter-montane depressions, was once covered by a large-scale ice mass: the former Cordilleran ice sheet. READ MORE

5. 3. On the interaction between ice sheets and the large-scale atmospheric circulation over the last glacial cycle

   Author : Marcus Löfverström; Rodrigo Caballero; Johan Nilsson; David Battisti; Stockholms universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Atmospheric stationary waves; coupled atmosphere-ice sheet modelling; stationary wave-ice sheet interactions; atmosfärvetenskap och oceanografi; Atmospheric Sciences and Oceanography;

   Abstract : The last glacial cycle (c. 115-12 kyr BP) was the most recent in a series of recurring glaciations of the subpolar continents. Massive ice sheets evolved in Eurasia and North America, which, at their maximum, were of continental scale and together lowered the global sea-level by approximately 100 m. READ MORE

6. 4. Geophysical Applications of Vegetation Modeling

   Author : Jed O Kaplan; Biologiska institutionen; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Environmental chemistry; Växtbiokemi; Plant biochemistry; CH4; CO2; stable isotopes; carbon cycle; wetland; ice core; methane; Holocene; mammoths; tundra; ice age; LGM; biogeography; biome; biogeochemistry; Vegetation model; Miljökemi; Physical geography; geomorphology; pedology; cartography; climatology; Fysisk geografi; geomorfologi; marklära; kartografi; klimatologi;

   Abstract : This thesis describes the development and selected applications of a global vegetation model, BIOME4. The model is applied to problems in high-latitude vegetation distribution and climate, trace gas production, and isotope biogeochemistry. READ MORE

7. 5. Climatic signals and frequencies in the Swedish Time Scale, River Ångermanälven, Central Sweden

   Author : Mikkel Sander; Kvartärgeologi; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; marklära; kartografi; klimatologi; pedology; cartography; climatology; Fysisk geografi; geomorfologi; geomorphology; Physical geography; winter precipitation; climate change; central Sweden; last 2000 year; discharge; varve;

   Abstract : Any future climate variation forced by human activities will be superimposed on the background of natural climate variation. Therefore, before interpreting the present climate and addressing future climate scenarios some knowledge of past climate is necessary. READ MORE