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Ocean final 2

Terms in this set (21)

what are the limiting nutrients in the ocean?
N, P, Si
What is the nitrogen speciation in the ocean?
N2--> 600 micro molar
NO3--> 0-45 micro molar
NO2--> 0-4 micro molar
NH4 --> 0-0.4 micro molar
what is the phosphorus in the ocean?
~ 1% is H2PO4
~ 87% is HPO4
~ 12% is PO4
what is the importance of phosphorus?
energy via ATP
What is the pk value for H4SiO4?
9.8 which is very high
What is Si in salt water pH?
mostly undissociated
What is SiO2 responsible for making?
makes exoskeletons shells and hard tissue
Wallace Broeker
the scientist who developed the "conveyor belt" circulation model of the ocean.
how do the two boxes mix?
by upwelling and downwelling
in the box model what does g stand for?
fraction of an element removed from the surface "box" into the deep "box" with (the biogenous) particle flux, per one mixing cycle
in the box model what does f stand for?
the fraction of g that did not re dissolve in the deep zone, but instead "survive destruction" and became buried in the sediments
biolimiting elements
those with a high value of g (g >0.8)for those elements f is usually very small
biounlimiting elements
those with a small value of g
biointermediate elements
those with a low g values of 0.4-0.7 or so
In surface waters which nutrients have very low concentrations?
NO3, PO4, and SiO2
What is the concentration of NO3 in the deep zones of each ocean?
-Atlantic:15-20 microM
-Indian: 30 micro M
-Pacific: 35-45 micro M
What is the concentration of PO4 in the deep zones of each ocean?
- Atlantic: 1-1.5 micro M
-Indian: 2.5- 3 micro M
-Pacific: 3-4 micro M
What is the concentration of SiO2 in the deep zones of each ocean?
-Atlantic: 60-80 micro M
-Indian: 140-150 micro M
-Pacific: 150-200 micro M
What is the order of the deep ocean D.O. concentration? (by ocean)
Deep Atlantic> Deep Indian> Deep Pacific
What is the D.O. in the Pacific deep ocean?
even here is it not equal to zero
What are the trends of the conveyor belt as the water travels from the deep atlantic to deep pacific? (6 trends)
- D.O. decreases
-PO4 increases
-NO3 increases
-pCO2 increases
-SiO2 increases
-pH decreases
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