Marine chemistry Flashcards
algae : trees
50:50
salinity
the total quantity of dissolved inorganic solids in water
How to measure salinity?
Chlorinity / conductivity
Most abundant ions in seawater
Chloride, Sodium, Sulfate
residence time
amount of element in the ocean / inout rate or output rate
conservative elements
Residence time is larger than circulation time, so evenly distributed. Don’t do much. Rt > 100.000 years
Scavenged elements
Chemical attach to particles and sink down. Rt = 50-1000 years
Recycled / nutrients
Taken up in the top layer, sink down. Reminalised by bacteria as depth increases. Rt= 1000-100000 years
Higher nutrient concentration in pacific because
deep ocean circulation transports sunken down biological material to the pacific. CaCo3 and SiO2 remineralize deeper in the water column –> higher in pacific.
Henry’s law
if the pressure of a gas over liquid increases, the amount of gas dissolved in the liquid will increase proportionally. Conversely, as the gas pressure decreases, the amount of gas dissolved in the solution drops.
Solubility decreases with
an increase of temperature
Why supersaturation of oxygen?
Bubble injection and photosynthesis
Why low oxygen concentration in pacific at 2000m depth
Conveyor belt moves oxygen rich waters from the Atlantic to the pacific, and in the meantime the bacteria use up all the oxygen. So you end up with low oxygen concentrations in the pacific.
Important difference in CO2 concentrations
Atmospheric concentrations are lower than the concentration in water
What is a nutrient?
A chemical that an organism needs to live and grow or a substance used in an organisms metabolism which must be taken in from its environment.
