GEOTRACES National Reports - Scientific Committee on Oceanic
... emission plumes may increase fractional iron solubility episodically. This indicates that fire emissions are not a major source of soluble iron, but that they may indirectly enhance the solubility of iron derived from mineral dust. An inverse hyperbolic relationship was observed between total iron c ...
... emission plumes may increase fractional iron solubility episodically. This indicates that fire emissions are not a major source of soluble iron, but that they may indirectly enhance the solubility of iron derived from mineral dust. An inverse hyperbolic relationship was observed between total iron c ...
Biogeoquímica dels fluxos de partícules en
... be a major driver of particle transport, increasing lateral advection of material at all stations. In this study, we assessed the sources and degradation of organic matter (OM) advected along canyons during both DSWC and quiescent conditions using specific organic biomarkers, including pigments, lig ...
... be a major driver of particle transport, increasing lateral advection of material at all stations. In this study, we assessed the sources and degradation of organic matter (OM) advected along canyons during both DSWC and quiescent conditions using specific organic biomarkers, including pigments, lig ...
Oceans and Coasts
... Distinct zones exist along a beach profile. Foreshore or intertidal – Region between high and low tide. Beach face – Steep, concave zone formed by wave swash. Backshore – Upper part of the beach. ...
... Distinct zones exist along a beach profile. Foreshore or intertidal – Region between high and low tide. Beach face – Steep, concave zone formed by wave swash. Backshore – Upper part of the beach. ...
large igneous provinces and fertile mantle
... seismic velocities and melting point compared to normal mantle peridotite. Although delaminated continental crust enters the mantle at much lower rates than oceanic crust, the rates are comparable to LIP production volumes. I speculate that the large melting anomalies that form on or near ridges and ...
... seismic velocities and melting point compared to normal mantle peridotite. Although delaminated continental crust enters the mantle at much lower rates than oceanic crust, the rates are comparable to LIP production volumes. I speculate that the large melting anomalies that form on or near ridges and ...
- Wiley Online Library
... 1. Top-down control can be an important determinant of ecosystem structure and function, but in oceanic ecosystems, where cascading effects of predator depletions, recoveries, and invasions could be significant, such effects had rarely been demonstrated until recently. 2. Here we synthesize the evid ...
... 1. Top-down control can be an important determinant of ecosystem structure and function, but in oceanic ecosystems, where cascading effects of predator depletions, recoveries, and invasions could be significant, such effects had rarely been demonstrated until recently. 2. Here we synthesize the evid ...
Cascading top-down effects of changing oceanic predator
... 1. Top-down control can be an important determinant of ecosystem structure and function, but in oceanic ecosystems, where cascading effects of predator depletions, recoveries, and invasions could be significant, such effects had rarely been demonstrated until recently. 2. Here we synthesize the evid ...
... 1. Top-down control can be an important determinant of ecosystem structure and function, but in oceanic ecosystems, where cascading effects of predator depletions, recoveries, and invasions could be significant, such effects had rarely been demonstrated until recently. 2. Here we synthesize the evid ...
Large Igneous Provinces, Delamination, and Fertile Mantle
... know the normal range of mantle temperatures. Convection calculations for a fluid with mantle-like properties that is heated internally and cooled from above predict temperature fluctuations of at least ±100°C (Anderson 2000). Geophysical evidence suggests that the mantle temperature under most LIPs ...
... know the normal range of mantle temperatures. Convection calculations for a fluid with mantle-like properties that is heated internally and cooled from above predict temperature fluctuations of at least ±100°C (Anderson 2000). Geophysical evidence suggests that the mantle temperature under most LIPs ...
Understanding Ocean Acidification Prior Knowledge Summary
... For now, leave this set for the default area. 4. Select “pH” in the “Which parameter?” pulldown. 5. Next select “Map” on the menu labeled “Which view?” 6. Specify the date by changing the date input to “January 2008.” 7. Select “Image” on the menu labeled “Select an output format.” 8. Finally, click ...
... For now, leave this set for the default area. 4. Select “pH” in the “Which parameter?” pulldown. 5. Next select “Map” on the menu labeled “Which view?” 6. Specify the date by changing the date input to “January 2008.” 7. Select “Image” on the menu labeled “Select an output format.” 8. Finally, click ...
The strange ecosystem of hydrothermal vents Nation Taiwan Ocean
... they still contain high levels of hydrogen sulfide and other compounds that specialized microbes can use for energy. This is the basis for an ecosystem that is largely independent of the sun and gives rise to the specialized vent animals such as large tubeworms and clams. The relatively low temperat ...
... they still contain high levels of hydrogen sulfide and other compounds that specialized microbes can use for energy. This is the basis for an ecosystem that is largely independent of the sun and gives rise to the specialized vent animals such as large tubeworms and clams. The relatively low temperat ...
PDF
... a lot of attention among various scientists. The high biomass density indicates that the hydrothermal site is one of the most dynamic and productive ecosystems on the earth (Childress and Fisher 1992; Fisher et al. 2007). The ecosystem is believed to be sustained by primary production of chemolithoa ...
... a lot of attention among various scientists. The high biomass density indicates that the hydrothermal site is one of the most dynamic and productive ecosystems on the earth (Childress and Fisher 1992; Fisher et al. 2007). The ecosystem is believed to be sustained by primary production of chemolithoa ...
Plate tectonics
... at mid-ocean ridges and spreads outwards, its thickness is therefore a function of its distance from the mid-ocean ridge where it was formed. For a typical distance that oceanic lithosphere must travel before being subducted, the thickness varies from about 6 km (4 mi) thick at midocean ridges to gr ...
... at mid-ocean ridges and spreads outwards, its thickness is therefore a function of its distance from the mid-ocean ridge where it was formed. For a typical distance that oceanic lithosphere must travel before being subducted, the thickness varies from about 6 km (4 mi) thick at midocean ridges to gr ...
nitrogen fixation in an estuarine environment
... same for both curves, implying that high concentrations of acetylene negate the inhibitory effect of Nz. The organisms most likely to be responsible folr biological nitrogen fixation in the anoxic etsuarine scdimcnts are anaerobic bacteria of the genus Clostridium. An enrichment and isolation proced ...
... same for both curves, implying that high concentrations of acetylene negate the inhibitory effect of Nz. The organisms most likely to be responsible folr biological nitrogen fixation in the anoxic etsuarine scdimcnts are anaerobic bacteria of the genus Clostridium. An enrichment and isolation proced ...
Plate tectonics - Free
... at mid-ocean ridges and spreads outwards, its thickness is therefore a function of its distance from the mid-ocean ridge where it was formed. For a typical distance that oceanic lithosphere must travel before being subducted, the thickness varies from about 6 km (4 mi) thick at midocean ridges to gr ...
... at mid-ocean ridges and spreads outwards, its thickness is therefore a function of its distance from the mid-ocean ridge where it was formed. For a typical distance that oceanic lithosphere must travel before being subducted, the thickness varies from about 6 km (4 mi) thick at midocean ridges to gr ...
Impacts of ocean acidification on marine fauna and ecosystem
... Oceanic uptake of anthropogenic carbon dioxide (CO2) is altering the seawater chemistry of the world’s oceans with consequences for marine biota. Elevated partial pressure of CO2 (pCO2) is causing the calcium carbonate saturation horizon to shoal in many regions, particularly in high latitudes and r ...
... Oceanic uptake of anthropogenic carbon dioxide (CO2) is altering the seawater chemistry of the world’s oceans with consequences for marine biota. Elevated partial pressure of CO2 (pCO2) is causing the calcium carbonate saturation horizon to shoal in many regions, particularly in high latitudes and r ...
Impacts of ocean acidification on marine fauna and ecosystem processes
... Oceanic uptake of anthropogenic carbon dioxide (CO2) is altering the seawater chemistry of the world’s oceans with consequences for marine biota. Elevated partial pressure of CO2 (pCO2) is causing the calcium carbonate saturation horizon to shoal in many regions, particularly in high latitudes and r ...
... Oceanic uptake of anthropogenic carbon dioxide (CO2) is altering the seawater chemistry of the world’s oceans with consequences for marine biota. Elevated partial pressure of CO2 (pCO2) is causing the calcium carbonate saturation horizon to shoal in many regions, particularly in high latitudes and r ...
The Mg isotopic composition of Cenozoic seawater – evidence for a
... Cooling of Earth’s climate over the Cenozoic has been accompanied by large changes in the magnesium and calcium content of seawater whose origins remain enigmatic. The processes that control these changes affect the magnesium isotopic composition of seawater, rendering it a useful tool for elucidati ...
... Cooling of Earth’s climate over the Cenozoic has been accompanied by large changes in the magnesium and calcium content of seawater whose origins remain enigmatic. The processes that control these changes affect the magnesium isotopic composition of seawater, rendering it a useful tool for elucidati ...
Ch 14 OIB mod 7
... Nor do they fall within the EMI-EMII-DM triangle, as they appear to do in the Nd-Sr systems. The remaining mantle reservoir: HIMU (high mu) proposed to account for this great radiogenic Pb enrichment pattern ...
... Nor do they fall within the EMI-EMII-DM triangle, as they appear to do in the Nd-Sr systems. The remaining mantle reservoir: HIMU (high mu) proposed to account for this great radiogenic Pb enrichment pattern ...
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.