Search for dissertations about: "volcanic eruptions climate"

Showing result 1 - 5 of 8 swedish dissertations containing the words volcanic eruptions climate.

  2. 1. Speleothems from Warm Climates : Holocene Records from the Caribbean and Mediterranean Regions

    Author : Meighan Boyd; Karin Holmgren; Ian J. Fairchild; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Stable isotopes; U-Th dating; trace elements; stalagmite; speleothem; Mid-Holocene; Caribbean; ITCZ; rapid climate change; climate; Eastern Mediterranean; Peloponnese; Santorini; Neolithic; Alepotrypa Cave; Physical Geography; naturgeografi;

    Abstract : This thesis contributes to increased knowledge on Holocene climate and environmental variability from two complex and sparsely studied areas. Using a speleothem from Gasparee Cave, Trinidad, as a paleoclimate archive, the local expression of the 8. READ MORE

  4. 2. Towards a Holocene tephrochronology for the Azores

    Author : Hans Johansson; Stefan Wastegård; Otto Hermelin; Ewa M. Lind; Christine S. Lane; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; kvartärgeologi; Quaternary Geology;

    Abstract : The Azores is situated in the North Atlantic Ocean and is one of the most active volcanicregions in the Northern Hemisphere. The volcanic history of the islands is fairly wellknown and several explosive trachytic eruptions have been reported but the geochemicalcompositions of the glass component of the tephra as well as the dispersal oftephras to distal areas are less well known. READ MORE

  5. 3. Volcanic Aerosols in the Upper Troposphere and Stratosphere – Aircraft- and Satellite-Based Observations

    Author : Sandra Andersson; Kärnfysik; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; carbonaceous aerosol; sulphate; ash; volcanic particles; upper troposphere; lowermost stratosphere; Stratospheric aerosol; volcanism; aerosol optical depth; radiative forcing; Fysicumarkivet A:2015:Andersson;

    Abstract : Volcanic eruptions are the largest source of variability in the stratospheric particle concentration as they inject SO2 that is subsequently converted into sulphate particles. No major perturbation of the stratospheric aerosol load has been observed since the large eruption of Pinatubo in 1991, but several moderate eruptions after 2000 have caused deviations from stratospheric background conditions. READ MORE

  6. 4. 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

  7. 5. Development and Implementation of a Wireless Sensor Network for Volcanic Gas Emission Monitoring

    Author : Yan Zhang; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; NOVAC; gas emission; sensor; embedded PC; volcano; DOAS; spectroscopy; SO2; network;

    Abstract : Volcanic eruptions have great impacts on the life of the inhabitants in the surrounding areas and even to the global climate. Around 15-21×10 Tg/yr SO2 are injected to the troposphere and the stratosphere by the active volcanoes in the world[Halmer et al., 2002]. READ MORE