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 20 of 65 for “"carbon fluxes"”.
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Dynamics and Drivers: Carbon fluxes from temperate freshwater reservoirs
… are significant sources of methane (CH4) and carbon dioxide (CO2) in the global carbon cycle, influencing the earth’s atmospheric energy budget. When considering freshwater reservoirs, these greenhouse gas emissions are anthropogenic, yet have received little research focus or integration into …
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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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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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Carbon fluxes of an extensive meadow and attempts for flux partitioning
In times of climate change and increasing carbon dioxide concentrations, three questions arise for ecosystem sciences: At first, which ecosystems can contribute to mitigate those processes? Secondly, how will ecosystems react on the changing conditions? And finally, is the performance of our …
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Carbon fluxes at an upland blanket bog in the north Pennines
… found in blanket bogs are significant stores of carbon. The degree to which these ecosystems are currently functioning as sinks or sources of carbon is not clear. There is a paucity of measurements from suitable sites but the available evidence suggests that certain sites might be close to being …
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Capturing dynamics of inorganic carbon fluxes from diurnal to decadal timescales
The marine carbon cycle plays an important role in regulating Earth's climate. The vastness of the open ocean and the large variability in the coastal ocean provide obstacles to accurately quantify storage and transport of inorganic carbon within marine ecosystems and between marine and other earth …
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Investigation of carbon fluxes in central metabolic pathways of Corynebacterium glutamicum
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1996.
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Carbon fluxes from tropical peatlands : methane, carbon dioxide, and peatland subsidence
… peatlands in Southeast Asia have sequestered carbon over thousands of years and are an important global carbon stock. In natural peat swamp forests, high water levels inhibit decomposition due to anoxic conditions. However, they are being rapidly deforested and drained, releasing stored carbon …
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Capturing dynamics of marine inorganic carbon fluxes from diurnal to decadal timescales
The marine carbon cycle plays an important role in regulating Earth’s climate. The vastness of the open ocean and the large variability in the coastal ocean provide obstacles to accurately quantify storage and transport of inorganic carbon within marine ecosystems and between marine and other earth …
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Biogeochemical Controls on Carbon Fluxes in a Restored Coastal Freshwater Forested Wetland
… ecosystem services that wetlands provide is carbon sequestration, a regulating service that helps moderate the impact of increased anthropogenic and natural emissions of greenhouse gases like CO2 and CH4. Carbon dynamics in wetlands are influenced by processes that promote the accumulation of …
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The effects of bog restoration in formerly afforested peatlands on water quality and aquatic carbon fluxes
… recognition of both the nature conservation and carbon sequestration services provided by peatlands. Forest-to-bog restoration involves conifer felling (and harvesting) along with blocking of forestry drains. Research from conifer felling and drain blocking on open peatlands shows significant …
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Estimation of the global carbon fluxes due to agricultural management activities using a land surface model (ISAM)
… land management practices to estimate the carbon dynamics induced by agricultural land management practices (i.e., planting crops, fertilization, irrigation, harvesting, and grazing) and land-use change (i.e., agricultural land expansion). The estimated global net carbon emission from …
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Quantitative analysis of carbon fluxes for fat biosynthesis in wild-type and IRS-1 knockout brown adipocytes
… of lipogenesis and modulating the lipogenic fluxes may provide novel approaches to intervention of the diseases. As a first step to quantitative investigation of lipogenic fluxes from various carbon sources as related to insulin signaling, relative contribution of glucose, glutamine, and …
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Simulating the Impacts of Land-Use Land-Cover Changes on Cropland Carbon Fluxes in the Midwest of the United States
… the major drivers of the cropland carbon fluxes is important for carbon management and greenhouse gas mitigation in agriculture. Past studies found that agricultural land-use and land-cover (LULC) changes, such as changes in cropland production technologies, tillage practices, and …
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Seasonal soil carbon fluxes in transitioning agricultural soils in Central Washington State: Relations to land-use, environmental factors and soil carbon-nitrogen characteristics
… agricultural land-use practices to increase soil carbon sequestration contributes to climate change mitigation and improved food security by moving CO<sub>2</sub> from the atmosphere into soil as soil organic carbon (SOC). In 2016, a farm in Thorp, Washington, Spoon Full Farm, began converting …
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Spatial and temporal dynamics of the terrestrial carbon cycle : assimilation of two decades of optical satellite data into a process-based global vegetation model
… the spatio-temporal distribution of terrestrial carbon fluxes for the time period of 1982 to 2002 simulated by a combination of the process-based dynamic global vegetation model LPJ and a 21-year time series of global AVHRR-fPAR data (fPAR – fraction of photosynthetically active radiation). …
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Integrated Terrestrial and Hydrological Carbon Budgets in High Arctic Watersheds
The movement of carbon between terrestrial and aquatic stores and the atmosphere exerts an important control on atmospheric greenhouse gas concentrations, and thus the extent of climate change. Understanding the magnitude of these carbon fluxes, and their controls, is important for informing …
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Measuring tropical forest disturbance and regrowth with spaceborne lidar
… agreed to have major implications for global carbon fluxes and biodiversity, it is difficult to quantify their impact using traditional optical and radar remote sensing. As a result, there is wide scientific uncertainty about the scale and trajectory of tropical forest loss and gain, and …
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The nitrogen cycle and ecohydrology of seasonally dry grasslands
… organization of ecosystem traits with the water, carbon, and nitrogen cycles. Observations from a factorial irrigation-fertilization experiment in a seasonally dry annual grassland are combined with a simple ecosystem model to identify relationships between vegetation, nitrogen availability, and …
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