Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 14 of 14 for “"Carbon Release"”.
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Estimating Carbon Pool and Carbon Release due to Tropical Deforestation Using High-resolution Satellite Data
… an operational tool for monitoring biomass and carbon pool of tropical forest ecosystems. The method was applied to a test site of Bangladesh. The research used Landsat ETM+, Landsat TM and IRS pan images of 2001, 1992 and 1999 respectively. Geometrically corrected Landsat ETM+ imagery was …
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Climatic drivers of retrogressive thaw slump activity and resulting sediment and carbon release to the nearshore zone of Herschel Island, Yukon Territory, Canada
… large amounts of sediment, including organic carbon and nitrogen, to the nearshore zone. The objective of this study was to 1) identify the climatic and geomorphological drivers of sediment-meltwater release, 2) quantify the amount of released meltwater, sediment, organic carbon and nitrogen, …
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Dissolution and Biokinetics of PCL in Denitrification Systems
… polymer, as a sustainable solid-phase carbon source for wastewater denitrification. Laboratory experiments examined the effects of temperature, bead mass, solvent type, hydraulic retention time, and bead reuse on PCL dissolution and soluble chemical oxygen demand (SCOD) release. The …
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Effects of invasion by the common reed (<i>phragmites australis</i>) on carbon transformations in a Great Lakes marsh
… environmental conditions enhanced gaseous carbon release, but high primary productivity resulted in net carbon storage.</p>
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Soil Respiration of Native Saskatchewan Grassland Calculated from Carbon Dioxide Concentration Profiles
… native grassland soils was 2.5 kg ha-1 hr -1. A carbon balance showed that an average annual carbon fixation of 240 g carbon per m2 compared with an annual CO2-carbon release of 220 g m-2. An equation is derived to predict CO2 evolution from the native grassland soil from soil moisture and soil …
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The influence of leaf litter and plants on soil respiration before, during and after a severe drought
… droughts may have a huge effect on ecosystem carbon storage but despite the importance of drought events, their effect on soil carbon dynamics are less well understood. The above-below ground linkages that affect soil dynamics in forested areas during drought and immediately after rewetting …
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A magmatic trigger for the Paleocene-Eocene Thermal Maximum?
… global warming (~6°C) that was caused by the release of large amounts of carbon into the ocean-atmosphere system. This Paleocene-Eocene Thermal Maximum (PETM) is often cited as an analogue of anthropogenic climate change. Many trigger mechanisms for the carbon release at the PETM have been …
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Tracking carbon fluxes across ocean interfaces using dissolved gas observations
The cycling and exchange of carbon between Earth’s systems play a pivotal role in regulating climate, yet two major carbon fluxes remain poorly constrained: the biological carbon pump (BCP) and carbon release from Arctic permafrost. This thesis focuses on dissolved gases as tracers and drivers of …
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The effects of scale and context-dependency on the outcome of experiments investigating soil carbon dynamics
Soil carbon dynamics and plant-soil interactions are an integral part of ecosystem function and understanding the effects of perturbations on these processes is vital if we are to predict the future of ecosystems under global environmental change. However, it is often challenging to study complex …
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A magmatic trigger for the Paleocene-Eocene thermal maximum?
… global warming (~6°C) that was caused by the release of large amounts of carbon into the ocean-atmosphere system. This Paleocene-Eocene Thermal Maximum (PETM) is often cited as an analogue of anthropogenic climate change. Many trigger mechanisms for the carbon release at the PETM have been …
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Tracking carbon fluxes across ocean interfaces using dissolved gas observations
The cycling and exchange of carbon between Earth’s systems play a pivotal role in regulating climate, yet two major carbon fluxes remain poorly constrained: the biological carbon pump (BCP) and carbon release from Arctic permafrost. This thesis focuses on dissolved gases as tracers and drivers of …
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Responses of boreal vegetation to recent climate change
… uptake, is associated with earlier ecosystem carbon release to the atmosphere. Moreover, the photosynthetic growing season has closely tracked the pace of warming and extension of the potential growing season in spring, but not in autumn. Rapid warming since the late 1980s has increased …
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Scotland’s blue carbon: the contribution from seaweed detritus
… more prominent. Introduction of the term ‘blue carbon’ (BC) has drawn attention to natural coastal habitats and their capacity to fix CO2. The overall aim of this thesis was to place the importance of carbon sequestration within the already essential services that macroalgae provide to the …
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Coevolutionary dynamics under anthropogenic impact in intensively managed landscapes
… in the rate and magnitude of water, soil, and carbon fluxes, and hence causes uncertainties in flood prediction, soil fertility, and food security. Understanding the co-evolution of various linked processes of hydrology, geomorphology, and biogeochemistry makes it possible to address the …