SOIREE Modeling - BudgetC

Carbon budget of the Upper Mixed Layer, calculated over 13 days (site occupation of SOIREE)

and 60 days since the initial iron release (inside and outside the fertilized patch)

SOIREE Modeling

Updated October 2000

Authors: E. Hannon, C. Lancelot, P.W. Boyd

Contact: Prof. C. Lancelot (ESA-ULB, CP221, Campus Plaine, Bd du Triomphe, B-1050 Brussels, Belgium, lancelot@ulb.ac.be)

Note: these model runs were performed with the SWAMCO model.

See details relative to model concepts, parameterization and adaptation to SOIREE in:

Lancelot, C., E. Hannon, S. Becquevort, C. Veth, and H. J. W. de Baar. 2000.

Modelling phytoplankton blooms and related carbon export production in the Southern Ocean:

application to the Atlantic sector in Austral spring 1992. Deep-Sea Res., Part I, 47, 1621-1662.

Hannon, E., P. W. Boyd, M. Silvoso and C. Lancelot. (this issue). Modeling the bloom evolution

and carbon flows during SOIREE: Implications for future in situ iron-enrichments in the Southern Ocean.

Deep-Sea Res. II.

Model results are compiled in the file "SOIREEmodel.xls"

This file includes 7 sheets:

Var.out: state variables time series (outside the patch)

Var.in: state variables time series (inside the patch)

Act.out: activities (biogenic elements fluxes) time series (outside the patch)

Act.in: activities (biogenic elements fluxes) time series (inside the patch)

BudgetC: integrated carbon budget

pCO2: surface pCO2 time series

Forcing: hydro-meteorological forcings

Comments:

Sheet 1 (Var.out):

60 days (10/02/1999 to 10/04/1999) time series of the state variables values, averaged daily

and over the upper mixed layer (UML)

See state variables list in Table 1 below.

Diatoms and autotrophic nanoflagellates chlorophyll a (columns AH, AI) are estimated on the

basis of the functional and structural metabolites concentration (state variables DAF and NFF),

using a conversion factor of 0.5 mg chla / mmol C

Sheet 2 (Var.in):

see Sheet 1

Sheet 3 (Act.out):

activities time series (outside the patch)

60 days (10/02/1999 to 10/04/1999) time series of the activities (biogenic elements fluxes)

values, integrated over the upper mixed layer (UML) and daily averaged.

See activities list in Table 2 below.

Sheet 4 (Act.in):

see Sheet 3

Sheet 5 (BudgetC):

Carbon budget of the Upper Mixed Layer, calculated over 13 days (site occupation of SOIREE) and

60 days since the initial iron release (inside and outside the fertilized patch)

Sheet 6 (pCO2):

Time series of daily averaged surface water pCO2 (in situ temperature, 100% wet) (inside and

outside the fertilized patch)

Sheet 7 (Forcing):

Time series of daily averaged wind velocity (m s-1), sea surface temperature (°C), and

mixed layer depth (m).

Table 1. SWAMCO state variables
activity				code		unit
diatoms photosynthesis			photDA		mmol m-2 day-1
diatoms respiration			respDA		mmol m-2 day-1
diatoms growth				sDAF		mmol m-2 day-1
diatoms lysis	l			ysDA		mmol m-2 day-1
nanoflagellates photosynthesis		photNF		mmol m-2 day-1
nanoflagellates respiration		respNF		mmol m-2 day-1
nanoflagellates growth			sNFF		mmol m-2 day-1
nanoflagellates lysis			lysNF		mmol m-2 day-1
NO3 uptake				NO3upt		mmol m-2 day-1
NH4 uptake by phytoplankton		NH4upt		mmol m-2 day-1
mesozooplankton grazing on diatoms	MSgDA		mmol m-2 day-1
mesozooplankton grazing on microzoo	MSgMC		mmol m-2 day-1
MCZ grazing on autotrophic nanofalg.	MCgNF		mmol m-2 day-1
MCZ grazing on heterotrophic nanoflag.	MCgHNF		mmol m-2 day-1
HNF grazing on bacteria			HNFgBAC		mmol m-2 day-1
bacteria growth				muBAC		mmol m-2 day-1
ammonification				NregBAC		mmol m-2 day-1
NH4 regeneration by protozooplankton	NregZOO		mmol m-2 day-1
PO4 regeneration by protozooplankton	Preg		mmol m-2 day-1
Fe regeneration by protozooplankton	Fereg		µmol m-2 day-1
POC export production (110m)		sed		mmol m-2 day-1
diatoms (C) export production (110m)	sedDA		mmol m-2 day-1
diatoms (Si) export production (110m)	sedBSi		mmol m-2 day-1
sea to air CO2 flux			CO2flux		mmol m-2 day-1
DIC upwelling				upwDIC		mmol m-2 day-1
Fe upwelling				upwFe		µmol m-2 day-1
bacteria autolysis			lysBAC		mmol m-2 day-1
HNF autolysis				lysHNF		mmol m-2 day-1
MCZ autolysis				lysMCZ		mmol m-2 day-1
POC export production out of the UML	sedUML		mmol m-2 day-1

Table 2. SWAMCO activities (fluxes of biogenic elements)	
activity						code		unit
Functional and structural metabolites (diatoms)		DAF		mmol C m-3
Monomeric substrates (diatoms)				DAS		mmol C m-3
Reserve material (diatoms)				DAR		mmol C m-3
Functional and structural metabolites (nanoflag.)	NFF		mmol C m-3
Monomeric substrates (nanoflag.)			NFS		mmol C m-3
Reserve material (nanoflag.)				NFR		mmol C m-3
Microzooplankton					MCZ		mmol C m-3
Heterotrophic nanoflagellates				HNF		mmol C m-3
Bacteria						BAC		mmol C m-3
monomeric substrates for bacteria (C)			BSC		mmol C m-3
dissolved organic C (high biodeg.)			DC1		mmol C m-3
dissolved organic C (low biodeg.)			DC2		mmol C m-3
particulate organic C (high biodeg.)			PC1		mmol C m-3
particulate organic C (low biodeg.)			PC2		mmol C m-3
monomeric substrates for bacteria (N)			BSN		mmol N m-3
dissolved organic N (high biodeg.)			DN1		mmol N m-3
dissolved organic N (low biodeg.)			DN2		mmol N m-3
particulate organic N (high biodeg.)			PN1		mmol N m-3
particulate organic N (low biodeg.)			PN2		mmol N m-3
dissolved organic P (high biodeg.)			DP1		mmol P m-3
dissolved organic P (low biodeg.)			DP2		mmol P m-3
particulate organic P (high biodeg.)			PP1		mmol P m-3
particulate organic P (low biodeg.)			PP2		mmol P m-3
nitrate							NO3		mmol N m-3
ammonium						NH4		mmol N m-3
phosphate						PO4		mmol P m-3
silicic acid						DSi		mmol Si m-3
biogenic Si						BSi		mmol Si m-3
total dissolved iron					DFe		µmol Fe m-3
total dissolved inorganic carbon			DIC		µmol kg-1
total alkalinity					ALK		µmol kg-1

model_budgetC.csv