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Table S1.  Parameter changes modified in this work relative to Moore et al. (2004).
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Parameter		Original Value		Modified Value	Units                       

Ref_Particle		0.0066			0.002			nmolC/cm2/sA 
Fe_max_scale		4.0			3.0			unitlessB
Fe_scav_threshold	0.4			0.5			nM FeC
POC_fescav_scale	0.002			0.0			unitlessD
diatom Kfe		0.16			0.15			nM FeE
CaCO3_temp		5.0			1.0			oC
alphaChl		0.25			0.3	 	nmolC/cm2/ngChlWdayF
alphaDiaz		0.03			0.036              	nmolC/cm2/ngChlWdayF
diatom Knh4		0.008			0.08			uM N
diazotroph Kpo4	0.0075			0.005			uM P
diazotroph Kfe	0.1			0.09			nM Fe
diazotroph max Fe/C	48.0			42.0			umolFe/molC
diazotroph N/P ratio	45.0			50.0			molN/molP
diazotroph mortality	0.18			0.16			per day
soft POM remin	42.0			130.0			mG
Q10 soft POM		2.0			1.12			unitless
soft bSi remin		32.0			22.0			mH
Q10 soft bSi		2.0			4.0			unitless
hard fraction bSi	0.55			0.37			unitlessI
soft POM remin  (where O2 < 4uM) 		260.0			mJ
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A - reference particle flux used in calculating iron scavenging rates. 
B - unitless maximum scaling factor of scavenging dependent on sinking particle flux.
C - threshold value below which iron scavenging rates are progressively decreased.
D - scaling factor for standing stock of particulate organic carbon used in Fe scavenging.
E - half saturation value for iron uptake by the diatoms.
F - initial slope of P vs. I curve, lower value for diazotrophs.
G - remineralization length scale for soft particulate organic matter.
H - remineralization length scale for soft biogenic silica.
I -   fraction of bSi resistant to dissolution within water column.
J - remineralization length scale increased under low O2 conditions based on Van Mooy et al., 2002.