SOIREE Modeling - pCO2

Surface pCO2 time series

Time series of daily averaged surface water pCO2 (in situ temperature, 100% wet)
(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_pCO2.csv