Browsing Doctoral Theses / Doktorsavhandlingar Institutionen för geovetenskaper by Title
Now showing items 23-42 of 55
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Observed and simulated changes in extreme precipitation and cold surges in China: 1961–2005
(2013-02-01)In the present work, precipitation and temperature related climate extremes are examined, with a focus on Mainland China. The objectives of this study are a) to identify targeted climate extremes and their changes during ... -
Observing and Modeling Precipitation in the Tibetan Plateau region - from large-scale processes to convective storms
(2023-02-20)Climate change in mountain regions has far-reaching societal impacts such as increased risks for natural hazards and water scarcity that may affect billions of people in the downstream regions. Precipitation changes play ... -
Ocean Climate Variability over Recent Centuries Explored by Modelling the Baltic Sea
(2009-09-03)Natural variability and anthropogenic factors both contribute to changes in the ocean climate of the Baltic Sea. Observations over the past century indicate that changes in environmental settings and ocean climate have ... -
Oceanographic studies of the Baltic Sea with emphasis on sea ice and mixing processes
(2009-05-06)This thesis comprises of model estimates of the water and heat budgets, re-estimating of the budget of deep-water mixing energy, model studies of generation mechanisms for internal waves, sea ice dynamics and finally sea ... -
Outdoor heat in urban areas - Model development and applications
(2022-05-10)Heat waves and high outdoor air temperature can lead to heat stress with negative implications for human health and wellbeing such as heat stroke, heat cramps, dehydration and in extreme cases death. The urban population ... -
Phosphorus recycling in brackish and marine environments - Sediment investigations in situ in the Baltic Sea and the By Fjord
(2012-11-29)The phosphorus load to the oceans from land started to increase since around 1950 when man started to mine phosphorus-mineral from phosphorus-rich soils and bedrock. The increased use of phosphorus fertilizers in agriculture ... -
Precambrian Crustal Evolution of the Rehoboth Province, Southern Africa
(2013-05-08)This thesis uses U-Pb, Sm-Nd Lu-Hf, Ar-Ar and Oxygen isotope data on well-documented rock samples, to investigate crustal evolution of the Precambrian Rehoboth Province of Southern Africa. This province is defined by its ... -
Predicting Spatial and Stratigraphic Quick-clay Distribution in SW Sweden
(2014-05-12)Clay sediments are associated with a wide variety of engineering problems, of which landslides, together with settlement, are the most investigated due to the large associated costs. Quick-clay deposits, which if disturbed ... -
Pressure, temperature and time constraints on tectonic models for southwestern Sweden
(2010-11-12)In this work, a number of key localities have been investigated in detail in order to provide precise constraints on models for the tectonic evolution of southern Sweden. The new data presented in this thesis show that ... -
Proterozoic crustal evolution in southcentral Fennoscandia
(2010-01-13)The Transscandinavian Igneous Belt (TIB) and the Eastern Segment of the Southwest Scandinavian Domain reflect advanced stages of continental growth within the Fennoscandian Shield. The relationship between the two units ... -
Proterozoic to Quaternary Events of Fracture Mineralisation and Oxidation in SE Sweden
(2008-11-18)Fracture minerals and altered wall rock have been analysed to reveal the low-temperature evolution, especially regarding redox conditions, of the Simpevarp area, SE Sweden. This area is one of the two areas in Sweden ... -
Rainfall variability, soils and land use changes in the Ethiopian highlands
(2013-09-16)Most farmers in the Ethiopian highlands are dependent on rain-fed agriculture. The indigenous cereal tef is the most important crop for the farmers in the highlands. The central highland is an environmentally fragile area ... -
Regional and local surface ozone variations in relation to meteorological conditions in Sweden
(2009-05-07)Air quality is strongly dependent on meteorological conditions. Atmospheric circulation encapsulates general information about local meteorological variables to some extent, and can serve as an explanatory variable for ... -
Rheological response to tectonic and volcanic deformation in Iceland
(2016-05-06)Iceland is one of the few places in the world where a Mid-Oceanic Ridge (MOR) is exposed on land, and this gives good opportunity to study geodynamic processes. Spreading of Mid-Atlantic Ocean Ridge (MAR) segments in Iceland ... -
Road climate studies with emphasis on road surface temperature variations and hoar frost risk
(2018-05-24)An effective road transportation system is a key enabler for national and global economic growth. In the wintertime, the presence of snow and ice on road surfaces reduces road surface friction and can result in serious ... -
Sedimentology and Geomorphology of Glacial Landforms in Southern Sweden
(2021-02-26)Ice sheets are disintegrating due to global warming. One factor controlling ice-sheet behavior is the processes active beneath the ice sheet. In particular, processes connected to glacial meltwater drainage are essential ... -
Simulated and observed change of precipitation and temperature in Europe with focus on the Greater Baltic Area
(2012-05-24)The regional climate of the Greater Baltic Area is complex and varies at a multitude of scales in space and time. This thesis contributes to increased understanding of climate change and climate variability in this area ... -
Spatiotemporal climate and atmospheric circulation variability in Asia inferred from tree rings
(2016-04-21)Observed 20th century warming trends accompanied by more frequent weather extremes such as droughts or intense rainfall events have consequences for societies and environments alike. In Asia, where the majority of the ... -
Studies of the Arctic Ocean sea ice cover and hydrothermal heat fluxes
(2012-10-26)Since reliable ice extent estimates from satellite data became available in 1979 the Arctic sea ice cover has followed a declining long term trend. Over the last decade the decline has accelerated with record low sea ice ... -
Summer Climate Variability during the Past 1200 Years in Central Scandinavia – A Tree-Ring Perspective
(2015-05-22)To set the current 20th century warming in a long-term context, significant efforts have been made to reconstruct hemispheric-to-global temperatures beyond the instrumental period. Tree-rings, which have annual resolution ...