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 15 of 15 for “"CO2 sink"”.
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Interannual variability of air-sea fluxes of carbon dioxide and oxygen
The currently observed increase in atmospheric CO2 due anthropogenic emissions is substantially slowed by natural processes that incorporate CO2 into the terrestrial biota and the ocean. Year-to-year changes in the CO2 growth rate that exceed variations in the fossil fuel source indicate a …
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CO2 Adsorption On Volcanic Ash: Net Contribution Of Volcanic Eruptions To The Global Carbon Cycle
<p>Adsorption of co2 on mineral surfaces accounts for a small percentage of the terrestrial co2 sink. Volcanic ash is virtually free of co2 when erupted and has a high surface area resulting in a high capacity for co2 adsorption. Volcanism is commonly assumed to be only a source of co2, but …
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How does plankton distribution and activity influence the variability of carbon dioxide uptake in the North Atlantic?
… analyse the variability of the carbon dioxide (CO2) sink in the North Atlantic at a range of spatial and temporal scales. Phytoplankton indices collected from the continuous plankton recorder (CPR) and the concentration of CO2 within the surface waters show that at seasonal time-scales …
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Integrated Terrestrial and Hydrological Carbon Budgets in High Arctic Watersheds
… during the growing season, with terrestrial CO2 emissions overwhelmingly dominating the budgets, accounting for 97.6%-99.6% of total losses. CH4 fluxes were very small compared to CO2, even after converting to CO2 equivalence. Carbon fluxes measured in 2023, a very warm year with more winter …
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Capturing dynamics of marine inorganic carbon fluxes from diurnal to decadal timescales
… far, the open ocean has been the only true net sink of anthropogenic carbon dioxide (Canthro) emissions. However, ocean storage of Canthro is not uniformly distributed. Changes in water chemistry in the Northeast Pacific were quantified to estimate the amount of Canthro stored in this region …
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A comparison of gas exchange models in the estimation of CO2 fluxes in the South Atlantic South of Africa for the summer season of 2008/2009
… is a problem in the determination of air-sea CO2 fluxes because of the number of different relationships used in calculating gas transfer velocities. There is also a problem with the CO2 sink in the Southern Ocean being greatly underestimated. Data were collected underway using an autonomous …
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Spatiotemporal Variability of CO2, Solar-Induced Fluorescence, And Precipitation Over the Tropical Rainforests
… season, transitioning from an atmospheric CO2 sink to a CO2 source. The Amazon basin, Congo basin, and the tropical Indo-Pacific play vital roles in biospheric processes, which contribute to Earth’s atmospheric CO2 concentration. This investigation will use various space-based and …
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A Comparison of Gas Exchange Models in the Estimation of CO2 Fluxes in the South Atlantic South of Africa for the Summer Season of 2008/2009
… is a problem in the determination of air-sea CO2 fluxes because of the number of different relationships used in calculating gas transfer velocities. There is also a problem with the CO2 sink in the Southern Ocean being greatly underestimated. Data were collected underway using an autonomous …
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Carbon fluxes of an extensive meadow and attempts for flux partitioning
… managed grassland, was defined as a net carbon sink (–91 g C m–2 a–1) in 2010. Spring droughts on the site suggested comparing carbon allocation into shoots, roots, soil and respiration fluxes on drought and normal plots in a stable isotope pulse labeling experiment. An increase of carbon …
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Plankton dynamics of the open Southern Ocean and surrounding the (Sub)Antarctic islands
… yet it accounts for ~30-40% of global ocean CO2 absorption annually. Marine plankton play a major role in the Southern Ocean CO2 sink as they fix dissolved atmospheric CO2 into organic carbon biomass, much of which supports the ocean food web and a portion of which sinks into the ocean …
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Understanding modelled sea-air CO2 flux biases in the Southern Ocean through the seasonal cycle
… forms a vital component of the earth system as a sink of CO2 and heat, taking over 40% of the annual oceanic CO2 uptake (75% of global heat uptake), slowing down the accumulation of CO2 in the atmosphere and thus the rate of climate change. However, recent studies based on the Coupled Model …
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Natural gradients in temperature and nitrogen: Iceland represents a unique environment to clarify long-term global change effects on carbon dynamics
… to important contributors of the N-induced C sink in the near future. However, the future evolution of both warminginduced SOC losses and the N-dependent C sink is highly uncertain due to the scarcity of empirical observations of long-term effects. In this thesis, natural gradients were used …
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Investigation of horizontal meteorological structures in comparison to turbulent structures at a forest edge
… is largest in the terrestrial biospheres (CO2 sink). Despite a vast number of ecological studies about forest ecosystem, there are still outstanding issues about prevailing meteorological conditions, turbulent and coherent structures and exchange processes of heterogeneous forest …
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Nitrogen cycling in the South Atlantic and South Indian Oceans investigated using nitrate isotopes: implications for nutrient supply, ocean fertility, carbon export, and climate
… If this signal is retained in plankton that sink to the seafloor, it could be used to reconstruct past Agulhas leakage, yielding quantitative insights into the strength of the Atlantic Meridional Overturning Circulation in the past. The Agulhas Current system, like other western boundary …
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Phytoplankton's role in the biological pump during the growth season across the Atlantic Southern Ocean
… (“new production”) can be equated to atmospheric CO2 removal, while growth fuelled by ammonium and urea (“regenerated production”) results in no net CO2 drawdown. As such, once phytoplankton begin assimilating the nitrate supplied from the subsurface, the upper Southern Ocean ecosystem starts …