Table 1.
Depth Integrated Process Rates of the Model With its Standard Deviation Compared to the Observed Rates
| Depth Integrated Rates | Equation and Stoichiometry | Model | Observed Rate |
|---|---|---|---|
| Sulfate reduction (mmol S m−2 d−1)a (in ( ) as mmol C m−2 d−1)c | A4 | 0.36 ± 0.02 (0.75 ± 0.10) | 0.28 – 1.00d |
| Heterotrophic denitrification (heterotrophic nitrite reduction to N2) (mmol N m−2 d−1)b (in ( ) as mmol C m−2 d−1)c | A3 | 0.23 ± 0.05 (0.27 ± 0.01) | n.d. |
| Sulfide-driven denitrification (sulfide oxidation coupled to nitrite reduction) (mmol N m−2 d−1)b | A11 | 0.13 ± 0.02 | n.d. |
| Canonical denitrification (heterotrophic denitrification + sulfide-driven denitrification) (mmol N m−2 d−1) | A3 + A11 | 0.36 ± 0.06b | 0.10 – 0.22b; 1.20 – 3.80e |
| Heterotrophic nitrate reduction to nitrite (mmol N m−2 d−1)b (in ( ) as mmol C m−2 d−1)c | A2 | 3.21 ± 0.54 (0.97 ± 0.05) | 4.70 – 9.90f |
| Total organic C remineralization (mmol C m−2 d−1)c | A1 to A4 | 2.08 ± 0.22 | 1.00 – 2.50g |
| Anammox (mmol N m−2 d−1) | A20 | 0.53 ± 0.05b | 0.70 – 1.21b,d; 0.14h |
| Primary productivity (g C m−2 d−1) | 3.13 | 2.00 – 3.50i | |
| Surface nitrogen fixation (µmol N m−2 d−1) | 16.19 | 7.5 – 190j |
a
Integrated from 85 to 150 m.
b
From 73.5 to 173 m for comparison with Canfield et al. [2010].
c
Integrated from 100 to 170 m for internal model comparison.
d
Canfield et al. [2010].
e
Estimated from Dalsgaard et al. [2012] for observations at ∼14°S (integrated from 75 to 150 m) and ∼26°S (integrated from 90 to 150 m) in February 2007.
f
Estimated from Peruvian OMZ [Lam et al., 2009].
g
Estimated from Escribano et al. [2004].
h
Estimated from Dalsgaard et al. [2012] for observations at ∼20°S (integrated from 50 to 100 m) in February 2007.
i
Carr and Kearns [2003].
j
Fernandez et al. [2011].
n.d.: no data.