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Oceans and Carbon Sequestration
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Blue Carbon
Blue carbon refers to carbon captured by the world's ocean and coastal ecosystems. Mangroves, seagrasses, and tidal marshes can capture and store carbon at a rate several times that of terrestrial forests.
Dissolved Inorganic Carbon (DIC)
DIC in the ocean includes carbon dioxide, carbonic acid, bicarbonate, and carbonate. It is a key component of the carbonate system that regulates ocean pH and serves as a buffer for sequestering carbon.
Marine Snow
Marine snow consists of organic detritus that falls from the upper layers of the ocean to the deeper layers, transporting carbon and aiding its sequestration in the sediment.
Seawater pH
Seawater pH indicates the acidity or alkalinity of ocean water, impacted by the absorption of CO2. It's essential for understanding the capacity of the ocean to sequester carbon and its effects on marine life.
Carbon Sequestration Rates
Sequestration rates refer to how quickly and efficiently carbon is stored in oceanic reservoirs. Various factors, including ocean temperature, circulation, and biological activity, influence these rates.
Carbonate Compensation Depth (CCD)
CCD is the depth in the ocean below which calcium carbonate shells and skeletons dissolve more quickly than they accumulate. It is significant for sequestering carbon as carbonate minerals.
Thermohaline Circulation
Thermohaline circulation is a part of the large-scale ocean circulation that is driven by global density gradients created by surface heat and freshwater fluxes. It plays a crucial role in redistributing heat and sequestering carbon in the ocean.
Continental Shelf Pump
The continental shelf pump refers to the process by which carbon is absorbed and stored in sediment on continental shelves. This pump can be quite efficient at sequestering 'pre-aged' carbon that is less likely to return to the atmosphere.
Biological Pump
The biological pump refers to the process by which CO2 is absorbed by phytoplankton through photosynthesis, sinks into the deep ocean as organic matter, and is sequestered for centuries to millennia.
Ocean Acidification
Ocean acidification is the decrease in ocean pH due to the uptake of CO2 from the atmosphere, affecting marine life and carbon sequestration abilities of the ocean.
Solubility Pump
The solubility pump is the process by which CO2 dissolves in seawater. Cooler water can hold more CO2, and the dissolved CO2 can be transported to the deep ocean via thermohaline circulation, where it is stored.
Iron Fertilization
Iron fertilization is a form of geoengineering involving the intentional introduction of iron to the upper ocean to stimulate a phytoplankton bloom, which can enhance biological carbon sequestration.
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