Thesis - UvA-DARE - University of Amsterdam
... In coastal marine sediments (e.g. intertidal areas, estuaries, continental shelf) oxygen penetrates only millimeters deep into the sediment, and hence degradation of organic matter mostly occurs anaerobically (Howarth 1984). Anaerobic mineralization pathways include the respiration of NO3-, FeOOH, M ...
... In coastal marine sediments (e.g. intertidal areas, estuaries, continental shelf) oxygen penetrates only millimeters deep into the sediment, and hence degradation of organic matter mostly occurs anaerobically (Howarth 1984). Anaerobic mineralization pathways include the respiration of NO3-, FeOOH, M ...
Effect of high CO2 and low pH on benthic - E
... 1958 by Charles David Keeling on Mauna Loa in Hawaii, time series of the composition of the atmosphere have been documented and, hence, constituted modern research on climate change (Treut et al. 2007). In order to evaluate atmospheric gas composition of the past and to make predictions for the fut ...
... 1958 by Charles David Keeling on Mauna Loa in Hawaii, time series of the composition of the atmosphere have been documented and, hence, constituted modern research on climate change (Treut et al. 2007). In order to evaluate atmospheric gas composition of the past and to make predictions for the fut ...
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... array. Upper suite lavas and latest stage boninitic dykes, on the other hand, lie above the mantle array indicating progressive subduction-related enrichment of the ophiolitic mantle source with time. On the Zr-Zr/Y discriminant plot (Fig. 8b; Pearce and Norry 1979), lower suite tholeiitic lavas plo ...
... array. Upper suite lavas and latest stage boninitic dykes, on the other hand, lie above the mantle array indicating progressive subduction-related enrichment of the ophiolitic mantle source with time. On the Zr-Zr/Y discriminant plot (Fig. 8b; Pearce and Norry 1979), lower suite tholeiitic lavas plo ...
The Upper Mantle Geoid: Implications for Continental Structure and
... (Chase, 1979; Crough, 1979; Crough and Jurdy, 1980; Kaula, 1967; Hager, 1984) demonstrates that this residual geoid is characterized by two dominant mass anomalies in the deep mantle near the coremantle boundary (Becker and Boschi, 2002). Apart from the geoid highs associated with subduction zones a ...
... (Chase, 1979; Crough, 1979; Crough and Jurdy, 1980; Kaula, 1967; Hager, 1984) demonstrates that this residual geoid is characterized by two dominant mass anomalies in the deep mantle near the coremantle boundary (Becker and Boschi, 2002). Apart from the geoid highs associated with subduction zones a ...
accepted manuscript
... and density changes due to metamorphic transforms in LP-HP range and the associated partial melting should also play a certain role (Yamato et al., 2008), but the impact of UHP transforms on subduction may be of minor importance (Toussaint et al., 2004a), specifically if one remembers that some UHP ...
... and density changes due to metamorphic transforms in LP-HP range and the associated partial melting should also play a certain role (Yamato et al., 2008), but the impact of UHP transforms on subduction may be of minor importance (Toussaint et al., 2004a), specifically if one remembers that some UHP ...
Sulfur_Geomicrobiolo..
... by using it as a source of reducing power for CO2 assimilation. Despite the terminology, several purple nonsulfur bacteria (Rhodospirillaceae) can also grow autotrophically on H2S as a source of reducing power for CO2 assimilation, but for the most part they tolerate only low concentrations of sulfi ...
... by using it as a source of reducing power for CO2 assimilation. Despite the terminology, several purple nonsulfur bacteria (Rhodospirillaceae) can also grow autotrophically on H2S as a source of reducing power for CO2 assimilation, but for the most part they tolerate only low concentrations of sulfi ...
Seamounts – characteristics, formation, mineral deposits and
... seamounts in the Central Indian Ocean Basin either have a circular shape (Fig. 2A; 3) or are elliptical (Fig. 2B). Subsequently, the shape is modified by later growth due to eruptions fed by dykes and these produce a starshaped base (Geisha Seamount, NW Pacific Basin, Vogt and Smoot, 1984). There ar ...
... seamounts in the Central Indian Ocean Basin either have a circular shape (Fig. 2A; 3) or are elliptical (Fig. 2B). Subsequently, the shape is modified by later growth due to eruptions fed by dykes and these produce a starshaped base (Geisha Seamount, NW Pacific Basin, Vogt and Smoot, 1984). There ar ...
thesis
... First and foremost, I would like to thank my two academic advisors without whom this thesis would not have been a reality. I would like to thank my primary advisor Katherine Richardson for giving me the opportunity to work within the very interesting and challenging topic of phytoplankton macroecolo ...
... First and foremost, I would like to thank my two academic advisors without whom this thesis would not have been a reality. I would like to thank my primary advisor Katherine Richardson for giving me the opportunity to work within the very interesting and challenging topic of phytoplankton macroecolo ...
Resurrecting the Ecological Underpinnings of Ocean Plankton Blooms
... shoaling mixed-layer depths (MLDs) naturally led early investigators to assume that the subarctic Atlantic spring bloom is a consequence of rapid cell division triggered by increasing light. In particular, a critical mixing depth was envisioned (Gran & Braarud 1935) that determined bloom onset. Sver ...
... shoaling mixed-layer depths (MLDs) naturally led early investigators to assume that the subarctic Atlantic spring bloom is a consequence of rapid cell division triggered by increasing light. In particular, a critical mixing depth was envisioned (Gran & Braarud 1935) that determined bloom onset. Sver ...
KENT C. CONDIE
... familiar with the basic tenets of plate tectonics and hence, rather than gloss over all topics related to plate tectonics in a cursory manner, selected topics are discussed in detail. Major topics include plate boundaries, plate motions, hotspots, geomagnetism. Earth systems, and supercontinents. In ...
... familiar with the basic tenets of plate tectonics and hence, rather than gloss over all topics related to plate tectonics in a cursory manner, selected topics are discussed in detail. Major topics include plate boundaries, plate motions, hotspots, geomagnetism. Earth systems, and supercontinents. In ...
the Zero Paradox Noble Gas Mantle
... The greatest strength of using noble gases as tracers of mantle processes is their chemical inertness and volatility. These characteristics result in efficient outgassing of the noble gases during melting, with negligible recycling back into the mantle system, which greatly simplifies their interpre ...
... The greatest strength of using noble gases as tracers of mantle processes is their chemical inertness and volatility. These characteristics result in efficient outgassing of the noble gases during melting, with negligible recycling back into the mantle system, which greatly simplifies their interpre ...
Thesis proposal
... Nitrogen is a major constituent of living mass and thus a chief determinant in metabolism and growth of open ocean algae. Consequently, the distribution and mean concentration of nitrate in the ocean affect the global fertility of the sea and its consequent exchange of gases with the atmosphere. As ...
... Nitrogen is a major constituent of living mass and thus a chief determinant in metabolism and growth of open ocean algae. Consequently, the distribution and mean concentration of nitrate in the ocean affect the global fertility of the sea and its consequent exchange of gases with the atmosphere. As ...
Earth`s heterogeneous mantle: A product of convection
... analyses of oceanic basalts. Despite the ever-increasing amount of data, the way in which compositional heterogeneity is manifest in the Earth's mantle, as well as the processes leading to mantle heterogeneity remain fundamental questions. The large amount of available isotope data in oceanic basalt ...
... analyses of oceanic basalts. Despite the ever-increasing amount of data, the way in which compositional heterogeneity is manifest in the Earth's mantle, as well as the processes leading to mantle heterogeneity remain fundamental questions. The large amount of available isotope data in oceanic basalt ...
Ecological aspects of marine Vibrio bacteria
... Heterotrophic bacteria of the genus Vibrio are indigenous in the marine environment although environmental cues regulate their growth and distribution. The attention brought to this genus is due to its many species/strains that are pathogenic to humans and other organisms. Vibrio abundances are stro ...
... Heterotrophic bacteria of the genus Vibrio are indigenous in the marine environment although environmental cues regulate their growth and distribution. The attention brought to this genus is due to its many species/strains that are pathogenic to humans and other organisms. Vibrio abundances are stro ...
The role of local atmospheric forcing on the
... mean MLD is more closely relate to the annual mean wind stress and the seasonality is more closely related to the seasonality in the heating. The single column ocean model, however, also points out that the MLD characteristics over most global ocean regions, and in particular in the tropics and subt ...
... mean MLD is more closely relate to the annual mean wind stress and the seasonality is more closely related to the seasonality in the heating. The single column ocean model, however, also points out that the MLD characteristics over most global ocean regions, and in particular in the tropics and subt ...
75 An Updated Synthesis of the Impacts of Ocean Acidification on Marine
... 4. Substantial natural biological variability exists in organisms’ responses to pH changes Metadata analyses, combining results from many experimental studies, show that there are different, but consistent, patterns in the response of different taxonomic groups to simulated future ocean acidificati ...
... 4. Substantial natural biological variability exists in organisms’ responses to pH changes Metadata analyses, combining results from many experimental studies, show that there are different, but consistent, patterns in the response of different taxonomic groups to simulated future ocean acidificati ...
Plume heads, continental lithosphere, flood
... km . Since other covergence regions give the expected fast velocity signal it appears that resolution is not the problem. The above anomalous regions also do not have the high geoid signals associated with some other subduction zones . The results around NZ-Tonga-Fiji, indicat. ing a broad region of ...
... km . Since other covergence regions give the expected fast velocity signal it appears that resolution is not the problem. The above anomalous regions also do not have the high geoid signals associated with some other subduction zones . The results around NZ-Tonga-Fiji, indicat. ing a broad region of ...
`emplacement` of an ophiolite?
... Ophiolites have long been recognized as on-land fragments of fossil oceanic lithosphere, which becomes an ophiolite when incorporated into continental margins through a complex process known as 'emplacement'. A fundamental problem of ophiolite emplacement is how dense oceanic crust becomes emplaced ...
... Ophiolites have long been recognized as on-land fragments of fossil oceanic lithosphere, which becomes an ophiolite when incorporated into continental margins through a complex process known as 'emplacement'. A fundamental problem of ophiolite emplacement is how dense oceanic crust becomes emplaced ...
A global seamount classification to aid the scientific design of
... 2.1.3. Allocation of biogeographic region Faunal composition varies throughout large areas of the worlds’ oceans, for a variety of reasons including historical as well as present day processes. This variation should be recognised before any sub-division based solely on physical factors occurs. Bioge ...
... 2.1.3. Allocation of biogeographic region Faunal composition varies throughout large areas of the worlds’ oceans, for a variety of reasons including historical as well as present day processes. This variation should be recognised before any sub-division based solely on physical factors occurs. Bioge ...
Sample pages 2 PDF
... flows extend throughout the entire water column, unless they are weakened by a dynamical adjustment of density interfaces in the ocean’s interior, called baroclinic compensation. In addition to the geostrophic flow regime, frictional effects become relevant near vertical (and lateral) boundaries. Ne ...
... flows extend throughout the entire water column, unless they are weakened by a dynamical adjustment of density interfaces in the ocean’s interior, called baroclinic compensation. In addition to the geostrophic flow regime, frictional effects become relevant near vertical (and lateral) boundaries. Ne ...
Microfacies, Carbon and Oxygen Isotopes of the Late Archean
... easily forms many oxides with other elements; the content of free oxygen can directly ...
... easily forms many oxides with other elements; the content of free oxygen can directly ...
A new model for the global biogeochemical cycle of carbonyl sulfide
... that direct sea–air OCS emissions mainly take place at midand high latitudes, during the respective periods of maximum irradiance. OCS surface concentrations show a strong diurnal cycle with a mid-afternoon maximum, suggesting that photoproduction is a major source of marine OCS (Ferek and Andreae, ...
... that direct sea–air OCS emissions mainly take place at midand high latitudes, during the respective periods of maximum irradiance. OCS surface concentrations show a strong diurnal cycle with a mid-afternoon maximum, suggesting that photoproduction is a major source of marine OCS (Ferek and Andreae, ...
Anoxic event
Oceanic anoxic events or anoxic events (Anoxia conditions) refer to intervals in the Earth's past where portions of oceans become depleted in oxygen (O2) at depths over a large geographic area. During some of these events, euxinia develops - euxinia refers to anoxic waters that contain H2S hydrogen sulfide. Although anoxic events have not happened for millions of years, the geological record shows that they happened many times in the past. Anoxic events coincide with several mass extinctions and may contribute to these events. These mass extinctions include some that geobiologists use as time markers in biostratigraphic dating. It is believed oceanic anoxic events are strongly linked to slowing of ocean circulation, climatic warming and elevated levels of greenhouse gases. Enhanced volcanism (through the release of CO2 and other greenhouse gases) is the proposed central external trigger for the development of these events.