Search for dissertations about: "Anthropogenic emissions"

Showing result 21 - 25 of 140 swedish dissertations containing the words Anthropogenic emissions.

2. 21. Microbial mitigation of greenhouse gas emissions from boreal lakes

   Author : Gaëtan Martin; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES;

   Abstract : The climate change crisis has drawn the attention of both the public and scientific community to the carbon cycle and particularly to the importance of greenhouse gases (GHG) carbon dioxide (CO2) and methane (CH4). CO2 has been a key component of Earth´s climate regulation throughout its geological history and is now the main driver of the current change in climate. READ MORE

4. 22. Historical anthropogenic radiative forcing of changes in biogenic secondary organic aerosol

   Author : Juan Camilo Acosta Navarro; Ilona Riipinen; Annica Ekman; Stockholms universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES;

   Abstract : Human activities have lead to changes in the energy balance of the Earth and the global climate. Changes in atmospheric aerosols are the second largest contributor to climate change after greenhouse gases since 1750 A.D. READ MORE

5. 23. Improved Energy Efficiency and Fuel Substitution in the Iron and Steel Industry

   Author : Maria Johansson; Mats Söderström; Henrik Saxén; Linköpings universitet; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; iron and steel industry; energy efficiency; CO2 emissions; fuel substitution; fuel switch; excess heat; biomass gasification; bio-syngas; synthetic natural gas; SNG; energy market scenarios; energy management; barriers; driving forces; järn- och stålindustrin; energieffektivisering; CO2-utsläpp; bränslebyte; överskottsvärme; restvärme; förgasning; bio-syntesgas; syntetisk naturgas; SNG; energimarknadsscenarier; energiledning; hinder; drivkrafter;

   Abstract : IPCC reported in its climate change report 2013 that the atmospheric concentrations of the greenhouse gases (GHG) carbon dioxide (CO2), methane, and nitrous oxide now have reached the highest levels in the past 800,000 years. CO2 concentration has increased by 40% since pre-industrial times and the primary source is fossil fuel combustion. READ MORE

6. 24. Anthropogenic 129I Traced in Environmental Archives by Accelerator Mass Spectrometry

   Author : Edvard Englund; Göran Possnert; Ala Aldahan; José María López-Gutiérrez; Uppsala universitet; []
   Keywords : Engineering physics; iodine-129; sediment; aerosol; reprocessing; Chernobyl; nuclear weapon; Sellafield; La Hague; accelerator mass spectrometry; AMS; Teknisk fysik;

   Abstract : Since the beginning of the nuclear era, starting during the 1940s, large amount of radioactivity has been released into the environment. This thesis deals with the temporal and spatial distribution of the anthropogenic radioisotope 129I (T1/2= 15.7 Myr) in northern Europe. READ MORE

7. 25. Contaminated organic sediments of anthropogenic origin: impact on coastal environments

   Author : Anna Apler; Ian Snowball; Sarah Josefsson; Lovisa Zillén; Magdalena Kuchler; Jonas Gunnarsson; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Fiberbank; fiber-rich sediment; metals; persistent organic pollutants; pore water; bottom water; dispersal; sorption; pulp and paper; chemostratigraphy; Anthropocene; Natural Resources and Sustainable Development; Naturresurser och hållbar utveckling;

   Abstract : The Baltic Sea is negatively affected by legacy pollutants such as metals and persistent organic pollutants (POPs) that are known to have adverse effects on living organisms, including, humans and were banned decades ago. This thesis addresses the dispersal of these pollutants from heavily contaminated, cellulose-rich sediments of industrial origin in the Ångermanälven river estuary in northern Sweden. READ MORE