Project Deliverable D50 Report on Best Practices ... - ESONET NoE
Project Deliverable D50 Report on Best Practices ... - ESONET NoE
Project Deliverable D50 Report on Best Practices ... - ESONET NoE
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Which problems remain to be solved ?<br />
-Mc Dougall, Jackett et Millero published an algorithm to calculate δSA(ϕ, λ, p) for<br />
Atlantic, Pacific, and Indian ocean from density analyses, S and SiO2, of 811 oceanic<br />
samples.<br />
They assessed a typical uncertainty of 0,0048 g/kg to this approach, but it is very rough<br />
because :<br />
- In some areas, correlati<strong>on</strong> between SiO2 and the other n<strong>on</strong>-i<strong>on</strong>ic molecules (CO2 ,<br />
dissolved organic matter…) is bad ;<br />
- There are oceanic areas where SiO2 c<strong>on</strong>centrati<strong>on</strong>s are not well knowned : Arctic<br />
ocean, limits between oceans …<br />
- 811 samples, that’s not a lot, compared to the ocean volume. Atlas are needed to<br />
extrapolate in depth…<br />
- Silicates c<strong>on</strong>centrati<strong>on</strong>s varies with organic matters dissoluti<strong>on</strong>, rivers sediments<br />
transports. Then, what behave these correcti<strong>on</strong>s ?<br />
- Do we make samples and analyses for each salinity measurement ?<br />
<str<strong>on</strong>g>Deliverable</str<strong>on</strong>g> #50 - update October 2010 67
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