Sökning: "particulate organic carbon"
Visar resultat 1 - 5 av 54 avhandlingar innehållade orden particulate organic carbon.
1. Analysis of tracer molecules from organic aerosols - Application of liquid phase microextraction to aerosol analysis
Sammanfattning : Airborne particulate matter is well known because of its adverse impacts on human health and its role in climate processes. In order to understand completely the role of aerosols in atmosphere, their chemical composition is of basic importance. LÄS MER
2. Molecular and isotopic characterization of terrestrial organic carbon released to (sub-)Arctic coastal waters
Sammanfattning : Arctic soils store half of the global soil organic carbon (OC) pool and twice as much C as is currently present in the atmosphere. A considerable part of these carbon pools are stored in permafrost. LÄS MER
3. Flocculation of Allochthonous Dissolved Organic Matter – a Significant Pathway of Sedimentation and Carbon Burial in Lakes
Sammanfattning : Inland waters receive substantial amounts of organic carbon from adjacent watersheds. Only about half of the carbon exported from inland waters reaches the oceans, while the remainder is lost en route. This thesis identifies flocculation as an important and significant fate of carbon in the boreal landscape. LÄS MER
4. Fate and transport of POPs in the aquatic environment : with focus on contaminated sediments
Sammanfattning : Persistent organic pollutants (POPs) are hydrophobic substances that readily sorb to organic matter in particles and colloids instead of being freely dissolved in the water phase. This sorption affects the bioavailability and environmental transport of the POPs. LÄS MER
5. Export and sources of organic carbon in the Lena River basin, Northeastern Siberia
Sammanfattning : Permafrost areas are considered to be one of the largest terrestrial storages of carbon. In a warming climate these areas are expected to experience changes in carbon transport to rivers and the oceans due to permafrost thawing, which could enhance erosion, change water flow pathways and increase greenhouse gas emissions. LÄS MER