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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
11

Holocene climate and atmospheric circulation changes in northern Fennoscandia interpretations from lacustrine oxygen isotope records /

Jonsson, Christina E., January 2009 (has links)
Diss. (sammanfattning) Stockholm : Stockholms universitet, 2009. / At the time of the doctoral defense, the following papers were unpublished and had a status as follows: Paper 1: In press. Paper 2: Submitted. Paper 5: In progress.
12

Possibilities of CO₂ emission reduction : process integration analysis and carbon trading schemes /

Wang, Chuan, January 1900 (has links)
Diss. (sammanfattning) Luleå : Luleå tekniska universitet, 2007. / Härtill 7 uppsatser.
13

Essays in climate change and forest management /

Wei, Jiegen, January 2009 (has links)
Diss. Göteborg : Göteborgs universitet, 2009. / Härtill 4 uppsatser.
14

Late Holocene humidity variability in central Sweden /

Andersson, Sofia, January 2009 (has links)
Diss. (sammanfattning) Stockholm : Stockholms universitet, 2010. / At the time of the doctoral defence, the following papers were unpublished and had a status as follows: Paper 1: Submitted. Paper 3: Accepted. Paper 5: In progress. Härtill 5 uppsatser.
15

Climate effects on phytoplankton biomass and functional groups /

Markensten, Hampus, January 2005 (has links)
Diss. (sammanfattning) Uppsala : Uppsala universitet, 2005. / Felaktig titel på omslag och rygg: Climate effect on phytoplankton biomass and functional groups. Härtill 5 uppsatser.
16

Essays on environmental and development economics : public policy, resource prices and global warming /

Sahlén, Linda, January 2008 (has links)
Diss. (sammanfattning) Umeå : Umeå universitet, 2009. / Härtill 4 uppsatser.
17

Klimatfrågor i kinesisk media : En jämförande analys av rapporteringen om klimatförändringar i Folkets Dagblad den 30-05-2017 till 19-06-2017

Haji, Saadia January 2019 (has links)
According to World Resources Institute, China burns as much coal as the whole world combined. This thesis aims to gain an insight into what the Chinese government thinks about climate change by examining 37 articles published by the state owned newspaper People’s Daily 30-05-2017 – 19-06-2017. This will be done in connection to the Paris agreement (CoP21), USA’s withdrawal from the agreement and by applying Good’s (2008), Semetko and Valkenburg’s (2000) news frames. In terms of Goods (2008) news frames, this research compares its results to another research done 25-11-2015 – 15-12-2015, to determine whether the reports have changed overtime. In addition, this study also examines how developing countries are portrayed in the newspaper with regard to climate change and with the help of Semetko and Valkenburg’s news frames. Both studies have shown that People's Daily mostly report about climate change in an economic and political context with a slight change in the economic frame that has seen an increase during the time period of this study. The newspaper also prefers to report about the solutions to counter climate change rather than causes. The articles praise China for its involvement in helping developing countries, and the developed countries are reported to be responsible for helping them (developing countries) fight climate change.
18

Climate change impacts on the catchment contribution to lake water quantity and quality /

Moore, Karen, January 2007 (has links)
Diss. (sammanfattning) Uppsala : Uppsala universitet, 2007. / Härtill 5 uppsatser.
19

Soil organic matter dynamics and methane fluxes at the forest-tundra ecotone in Fennoscandia /

Sjögersten, Sofie, January 2003 (has links)
Diss. (sammanfattning) Uppsala : Univ., 2003. / Härtill 5 uppsatser.
20

Klimatpåverkan från användande av skogsrester till bioenergi med koldioxidlagring (BECCS) och biokol i Sverige : En komparativ livscykelanalys mellan två klimatåtgärder i en svensk kontext / Comparative life cycle assessment of using forest residues for Bio-energy with carbon capture and storage (BECCS) and biochar for climate mitigation in Sweden.

Granström, John January 2018 (has links)
Oförmåga att minska utsläppen av växthusgaser i tillräckligt takt för att undvika en alltför kraftig global uppvärmning har motiverat framtagandet av tekniker med potential att minska mängden koldioxid i atmosfären. En av dessa tekniker är bioenergi med koldioxidlagring (Bio-energy with carbon capture and storage, BECCS), där koldioxid avskiljs från punktkällor med biogena utsläpp och lagras i geologiska strukturer. Även biokol tillsatt till jordbruksmark har potential att bidra till negativa utsläpp. Både svenska och internationella strategier inkluderar negativa utsläpp för att uppfylla förpliktelserna i Parisavtalet. För att säkerhetsställa att teknikerna lever upp till potentialen krävs ett livscykelperspektiv där klimatpåverkan beräknas på systemnivå. En livscykelanalys utfördes, där klimatpåverkan vid utnyttjande av grenar och toppar (GROT) från den svenska skogsindustrin beräknades för teknikerna BECCS och biokol tillsatt till jordbruksmark. Teknikerna jämfördes med ett referensscenario där GROT förbränns i ett kraftvärmeverk för att producera el och fjärrvärme utan omhändertagande av koldioxid som bildas vid förbränning. Resultaten visar att BECCS har potentialen att bidra med negativa utsläpp på mellan -168 och -666 kg CO2-ekvivalenter/ ton GROT torrsubstans (TS). Då GROT-skörden ökar till 80% av den årliga avverkade arealen skog i Sverige och kombineras med gallring, resulterar 666 kg CO2-ekvivalenter/ ton GROT TS, i 4,4 miljoner ton CO2-ekvivalenter per år. Detta motsvarar 25,8 % av klimatpåverkan från inrikestransporter i Sverige år 2016. Nettoutsläppen från biokol tillsatt till jordbruksmarker, varierar mellan 934 och -344 kg CO2-ekvivalenter/ ton GROT TS. Då GROT-skörden ökar till 80% av den avverkade arealen skog i Sverige och kombineras med gallring, resulterar 344 kg CO2-ekvivalenter/ton GROT TS i 2,2 miljoner ton CO2-ekvivalenter. Detta motsvarar 13,3 % av klimatpåverkan från inrikes transporter i Sverige år 2016. Båda teknikerna har potential att åstadkomma nettonegativa växthusgasutsläpp, men resultaten är beroende av klimatpåverkan från ersättande el- och fjärrvärmeproduktion. / The inability to achieve sufficient reduction of greenhouse gas emissions has led to the development of techniques with potential to achieve negative greenhouse gas emissions. One of these techniques is called Bio-energy with carbon capture and storage (BECCS), where carbon dioxide is captured from biogenic point sources with biogenic emissions and stored underground. Biochar applied to farmland is another technique with potential to achieve negative greenhouse gas emissions. Both Swedish and international strategies, to meet the obligations in the Paris Agreement, include negative greenhouse gas emissions. A life cycle approach is required to ensure that the techniques deliver on the promise of negative emissions. A Life cycle assessment was conducted where the global warming potential was calculated for BECCS and biochar added to farmland in two different scenarios where tops and branches (GROT) from the Swedish forest industry were used as feedstock. The techniques were compared to a reference scenario where GROT were used in a combined heat and power plant (CHP-plant). The results show that BECCS has the potential to achieve net negative emissions of between -168 and -666 kg CO2-equivalents/ tonne GROT dry matter (DM). When GROT is harvested from 80% of the yearly final felling areas in Sweden and combined with thinning, 666 kg CO2-equivalents/ Mg GROT DM is equivalent to in 4,4 million ton CO2-equivalents per year. This corresponds to 25,8 % of Sweden's greenhouse gas emissions from domestic transportation in 2016. The results of greenhouse gas emissions from biochar applied to farmland varied between 934 to -344 CO2-equivalents/ Mg GROT DM. When GROT is harvested from 80% of final felling areas in Sweden and combined with thinning, -344 CO2-equivalents/ Mg GROT DM is equivalent to 2,2 million ton CO2- equivalents per year. This corresponds to 13,3 % of Sweden's greenhouse gas emissions from domestic transportation in 2016. Both techniques have the potential to achieve net negative greenhouse gas emissions. However, the results are greatly influenced by the climate impact from generating the electricity to replace the losses in electricity production when GROT is used for BECCS and biochar instead of in a CHP-plant.

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