MOTM Methane
... calculated over a 100-year span is 22-23 times greater than that of CO2. Because of this, there is concern about methane emissions from diverse natural sources, such as mud volcanoes and ruminants, together with the possibility of losses from methane hydrates, released as the oceans warm up. 1990 es ...
... calculated over a 100-year span is 22-23 times greater than that of CO2. Because of this, there is concern about methane emissions from diverse natural sources, such as mud volcanoes and ruminants, together with the possibility of losses from methane hydrates, released as the oceans warm up. 1990 es ...
22.4 Plate Tectonics
... sink into the mantle in the process of subduction. Subduction zones are near the edges of oceanic plates. As a plate sinks through a subduction zone, it bends, forming a depression in the ocean floor called a trench. ...
... sink into the mantle in the process of subduction. Subduction zones are near the edges of oceanic plates. As a plate sinks through a subduction zone, it bends, forming a depression in the ocean floor called a trench. ...
Global Oceans Governance: New and Emerging Issues
... oceans as a conservation concern (1–3). Governance interventions to support development and/or conservation (4) will confront a series of challenges based on the biophysical, political, and social nature of oceans. Biophysically, oceans are vast, varied, complex, fluid, and three-dimensional. For hu ...
... oceans as a conservation concern (1–3). Governance interventions to support development and/or conservation (4) will confront a series of challenges based on the biophysical, political, and social nature of oceans. Biophysically, oceans are vast, varied, complex, fluid, and three-dimensional. For hu ...
Rationale: Atmospheric carbon dioxide concentrations have
... pCO2 is currently measured automatically and at high resolution at four of the five sites. Systems are presently operational on the MV Santa Maria, MV Pride of Bilbao, RV Prince Madog and RV Plymouth Quest. pH can now be measured to almost the degree of precision required for this work using a flowi ...
... pCO2 is currently measured automatically and at high resolution at four of the five sites. Systems are presently operational on the MV Santa Maria, MV Pride of Bilbao, RV Prince Madog and RV Plymouth Quest. pH can now be measured to almost the degree of precision required for this work using a flowi ...
one ocean final.indd
... View Episode 1: “Birth of an Ocean” and identify the major events and their timing (e.g., birth of the ocean four billion years ago). Teachers may wish to show the episode in two segments, with questions and time for reflection at the end of each segment. ...
... View Episode 1: “Birth of an Ocean” and identify the major events and their timing (e.g., birth of the ocean four billion years ago). Teachers may wish to show the episode in two segments, with questions and time for reflection at the end of each segment. ...
The Oceans - Academic Program Pages
... Other Pacific volcanoes are more sedate. For instance, eruptions from Hawaiian volcanoes are comparatively gentle because their magma has very little water. The dry magma emerges from above a hot spot deep within the earth’s mantle. And just as a blowtorch poised below a slab of moving metal would b ...
... Other Pacific volcanoes are more sedate. For instance, eruptions from Hawaiian volcanoes are comparatively gentle because their magma has very little water. The dry magma emerges from above a hot spot deep within the earth’s mantle. And just as a blowtorch poised below a slab of moving metal would b ...
Fifteen years of ocean observations with the global Argo array
... temperature and salinity gradients at the sea surface, the surface waters at any latitude are subducted below those ...
... temperature and salinity gradients at the sea surface, the surface waters at any latitude are subducted below those ...
Guyot Science 2005
... due to warming of waters and bubble entrainment. In air samples, the Ar/N2 ratio reflects seasonal outgassing and ingassing due to temperature-driven solubility changes, and also to atmospheric mixing. ...
... due to warming of waters and bubble entrainment. In air samples, the Ar/N2 ratio reflects seasonal outgassing and ingassing due to temperature-driven solubility changes, and also to atmospheric mixing. ...
ocean fertilisation: SCIENCE aNd POLICY ISSuES
... to ‘fertilise’ large areas of the ocean by adding nutrients that are in short supply to increase the growth of microscopic marine plants. These plants consume carbon dioxide (CO2) during photosynthesis, so enhancing their growth would increase the ocean’s capacity to draw CO2 out of the atmosphere. ...
... to ‘fertilise’ large areas of the ocean by adding nutrients that are in short supply to increase the growth of microscopic marine plants. These plants consume carbon dioxide (CO2) during photosynthesis, so enhancing their growth would increase the ocean’s capacity to draw CO2 out of the atmosphere. ...
Phosphorus cycling in the Sargasso Sea: Investigation
... North Atlantic. They concluded this activity was due to enhanced utilization of the DOP pool in response to high levels of nitrogen fixation, forcing the system towards P-limitation. The third line of evidence is rapid turnover times above the thermocline (4 - 8 hours) that increases with depth to ...
... North Atlantic. They concluded this activity was due to enhanced utilization of the DOP pool in response to high levels of nitrogen fixation, forcing the system towards P-limitation. The third line of evidence is rapid turnover times above the thermocline (4 - 8 hours) that increases with depth to ...
Oceanography and Atmospheric Sciences: 1959–2009
... At the request of Governor Tom McCall, three faculty members from the OSU Department of Oceanography (a marine geologist, physical oceanographer, and biologist), together with ...
... At the request of Governor Tom McCall, three faculty members from the OSU Department of Oceanography (a marine geologist, physical oceanographer, and biologist), together with ...
1 2 Fifteen years of ocean observations with the global Argo array 3
... temperature and salinity gradients at the sea surface, the surface waters at any latitude are subducted below those ...
... temperature and salinity gradients at the sea surface, the surface waters at any latitude are subducted below those ...
Plate boundaries
... of moving continents across the globe Wegner suggested that continents broke through the ocean crust, much like ice breakers cut through ice ...
... of moving continents across the globe Wegner suggested that continents broke through the ocean crust, much like ice breakers cut through ice ...
Power Point File 9
... may be underlain either by the accretionary prism or arc basement rocks covered by a thin veneer of sediments or both. Where there is little sediment accumulation on the subducting plate, island arc or continental basement may extend all the way to the lower trench slope and little or no accretionar ...
... may be underlain either by the accretionary prism or arc basement rocks covered by a thin veneer of sediments or both. Where there is little sediment accumulation on the subducting plate, island arc or continental basement may extend all the way to the lower trench slope and little or no accretionar ...
Historical records of coastal eutrophication
... tal oscillations leave their imprint in sediment cores. A central issue when considering sediment records of coastal hypoxia is the close relationship between hypoxia (the degree of oxygenation) and eutrophication (which leads to an enhanced organic input to the seafloor). These two parameters are u ...
... tal oscillations leave their imprint in sediment cores. A central issue when considering sediment records of coastal hypoxia is the close relationship between hypoxia (the degree of oxygenation) and eutrophication (which leads to an enhanced organic input to the seafloor). These two parameters are u ...
Sample
... boundaries that result from these collisions. Oceanic–Continental: Denser oceanic plate subducts below the continental plate. Oceanic plate is heated as it subducts into the asthenosphere, releasing superheated gases that partially melt the overlying mantle, rising to the surface through the overrid ...
... boundaries that result from these collisions. Oceanic–Continental: Denser oceanic plate subducts below the continental plate. Oceanic plate is heated as it subducts into the asthenosphere, releasing superheated gases that partially melt the overlying mantle, rising to the surface through the overrid ...
Sample
... boundaries that result from these collisions. Oceanic–Continental: Denser oceanic plate subducts below the continental plate. Oceanic plate is heated as it subducts into the asthenosphere, releasing superheated gases that partially melt the overlying mantle, rising to the surface through the overrid ...
... boundaries that result from these collisions. Oceanic–Continental: Denser oceanic plate subducts below the continental plate. Oceanic plate is heated as it subducts into the asthenosphere, releasing superheated gases that partially melt the overlying mantle, rising to the surface through the overrid ...
Blue carbon in human-dominated estuarine and shallow coastal
... Below, by synthesizing mechanistic hypotheses and empirical evidence from previous studies (Table 1), we conceptualize that human impacts are closely related to the creation of Catm uptake. Our hypothesis is that discharges of high-nutrient but relatively low-carbon water generated by wastewater tre ...
... Below, by synthesizing mechanistic hypotheses and empirical evidence from previous studies (Table 1), we conceptualize that human impacts are closely related to the creation of Catm uptake. Our hypothesis is that discharges of high-nutrient but relatively low-carbon water generated by wastewater tre ...
D N O P
... the opportunity, urged by many presenters, to develop truly integrated ocean and coastal observing and prediction systems that are more sophisticated than ever before . . . but will we seize the opportunity? ...
... the opportunity, urged by many presenters, to develop truly integrated ocean and coastal observing and prediction systems that are more sophisticated than ever before . . . but will we seize the opportunity? ...
Percolating Through Volcanic Subsurface Rocks, Seawater is
... Fuca Ridge off the northwestern US coast, and one on the Mid-Atlantic Ridge about halfway between Florida and West Africa. The drill cores recovered from these sites allow scientists to study the variability in rock-water reactions that occur under the different physical and chemical conditions foun ...
... Fuca Ridge off the northwestern US coast, and one on the Mid-Atlantic Ridge about halfway between Florida and West Africa. The drill cores recovered from these sites allow scientists to study the variability in rock-water reactions that occur under the different physical and chemical conditions foun ...
Oceanography - Flushing Community Schools
... hot water billow out into surrounding seawater. As the superheated water cools, mineral deposits sometimes form. As a result, elements such as sulfur and metals like iron, copper, zinc, and silver can be concentrated in these areas. Today, no one is mining these valuable materials from the depths be ...
... hot water billow out into surrounding seawater. As the superheated water cools, mineral deposits sometimes form. As a result, elements such as sulfur and metals like iron, copper, zinc, and silver can be concentrated in these areas. Today, no one is mining these valuable materials from the depths be ...
Deep Seabed Mining
... with only 8 contracts in 2010. Contract holders will be able to apply for licences to carry out commercial mining in the high seas as soon as regulations for exploitation are developed – anticipated as early as 2016.4 There is also significant exploration interest within national waters, particularl ...
... with only 8 contracts in 2010. Contract holders will be able to apply for licences to carry out commercial mining in the high seas as soon as regulations for exploitation are developed – anticipated as early as 2016.4 There is also significant exploration interest within national waters, particularl ...
The deep sea is a major sink for microplastic debris
... from pole to pole [1,2]. It has major environmental impacts and is recognized as one of the key challenges of our century [1–3]. However, despite extensive environmental monitoring, there is little evidence of the expected increasing abundance of plastic debris in natural habitats. Only two studies ...
... from pole to pole [1,2]. It has major environmental impacts and is recognized as one of the key challenges of our century [1–3]. However, despite extensive environmental monitoring, there is little evidence of the expected increasing abundance of plastic debris in natural habitats. Only two studies ...
Long-time Series in Icelandic Waters in Relation to Physical
... observe if its response will be found in low salinity in South Icelandic waters around year 1996, and then once more with its impact on the Icelandic capelin stock in North Icelandic waters around year 2000. Whether it is the large scale anomalies or just local variations, the conditions observed he ...
... observe if its response will be found in low salinity in South Icelandic waters around year 1996, and then once more with its impact on the Icelandic capelin stock in North Icelandic waters around year 2000. Whether it is the large scale anomalies or just local variations, the conditions observed he ...
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.