Modeled vertical carbon and nitrogen fluxes in waters of Namibia

Osma, Natalia; Postel, L.; Fernández-Urruzola, Igor; Herrera-Ulibarri, Alicia; Gómez, May; Packard, Theodore T.

Modeled vertical carbon and nitrogen fluxes in waters of Namibia

Author: Osma, Natalia,Postel, L.,Fernández-Urruzola, Igor,Herrera-Ulibarri, Alicia,Gómez, May,Packard, Theodore T.

Year: 2012

Source: https://accedacris.ulpgc.es/jspui/bitstream/10553/10003/4/0678989_00000_0000.pdf

Modeled e ical Ca bon and
Ni ogen luxes in wa e s o Namibia
N. Osma , L. Pos el , I. Fe nández-U uzola, A. He e a,
M. Gómez and T. T. Packa d
No he n Benguela upwelling:
D i ing o ces and ecosys em esponses
18 – 20 Sep embe 2012, IOW Wa nemünde, Ge many
Benguela Upwelling
MSM 18/5
I. Moo ing s a ions, NAM006 & NAM011
II. 3 Sec ions 12 ST & 1 Sec ion 21 ST
NAM006
NAM011
I. Moo ings S a ions
NAM006
Da e: 09/06/2011
Max. dep h: 192 m.
Moo ing dep h: 170 m.
NAM011
Da es: 09/07/2011 and
09/17/2011
Max. dep h: 395 m.
Moo ing dep h: 330 m.
NAM006 NAM011
Sampling Me hodology
Mic oplank on
9 - 10 dep hs wi h he Rose e
4 - 6 li e s o SW il e ed on boa d
Fil e s ozen on liquid N2
I. Moo ing s a ions
Zooplank on
7 dep hs wi h he Mul ine
Size ac iona ion on boa d
C yo ials ozen on liquid N2
Back a lab,
ETS and GDH ac i i ies (Packa d e al., 1971; Bidiga e
and King, 1981)
P o ein con en (Low y, 1951)
Resul s I. Moo ing s a ions
A he 3 s a ions, he b- alue is highe in zooplank on han in mic oplank on.
NAM006
♦ Mic oplank on ♦ Zooplank on
RNH4+ = 6.0407z-0.618
R² = 0.9902
RNH4+ = 1.3359z-0.613
R² = 0.6187
0
50
100
150
200
0,0 0,2 0,4 0,6 0,8 1,0
DEPTH (m)
NH4+ EXCRETION (μmol NH4+·h-1·m-3) RCO2 PRODUCTION (μmol CO2·h-1·m-3)
RCO2 = 1724.8z-1.257
R² = 0.8906
RCO2 = 32.61z-0.604
R² = 0.9344
0
50
100
150
200
0 5 10 15 20 25 30 35

Resul s I. Moo ing s a ions
NAM011 (7 Sep .)
♦ Mic oplank on ♦ Zooplank on
NH4+ EXCRETION (μmol NH4+·h-1·m-3) RCO2 PRODUCTION (μmol CO2·h-1·m-3)
RNH4+ = 13.988z-0.786
R² = 0.8847
RNH4+ = 6.2352z-0.741
R² = 0.7017
0
100
200
300
400
500
600
0,0 0,2 0,4 0,6 0,8 1,0 1,2
DEPTH (m)
RCO2 = 5373.3z-1.548
R² = 0.7936
RCO2 = 30.21z-0.472
R² = 0.8979
0
100
200
300
400
500
600
0 5 10 15
A he 3 s a ions, he b- alue is highe in zooplank on han in mic oplank on.
Resul s I. Moo ing s a ions
NAM011 (17 Sep .)
♦ Mic oplank on ♦ Zooplank on
NH4+ EXCRETION (μmol NH4+·h-1·m-3) RCO2 PRODUCTION (μmol CO2·h-1·m-3)
RNH4+ = 7.543z-0.633
R² = 0.87
RNH4+ = 0.9606z-0.237
R² = 0.8919
0
100
200
300
400
500
600
0,0 0,5 1,0 1,5
DEPTH (m)
RCO2 = 1393.5z-1.378
R² = 0.863
RCO2 = 4.7737z-0.14
R² = 0.8831
0
100
200
300
400
500
600
0 10 20 30 40
A he 3 s a ions, he b- alue is highe in zooplank on han in mic oplank on.
Resul s I. Moo ing s a ions
Calcula e he de ini e in eg al om he di e en dep hs (za) o
he sea loo (zs)
Ni ogen Fn = ∫RNH4+ dz = ∫R0z-b
Fn = (R0/(1-b))*(zs(1-b) - za(1-b) )
Ca bon Fc = ∫RCO2 dz = ∫R0z-b
Fc = (R0/(1-b))*(zs(1-b) - za(1-b) )
Plo Fn and Fc e sus dep h
Resul s Moo ings s a ions
Ni ogen
Zooplank on Mic oplank on
● NAM006 ● NAM011 (7 Sep .) ● NAM011 (17 Sep .)
0
100
200
300
400
500
600
0 1000 2000 3000
N - FLUX (μmol N·d-1·m-2)
Fn= 204631 z -1.405
Fn= 93320 z -0.996
Fn= 84276 z -0.93
0
100
200
300
400
500
600
0 1000 2000 3000
Fn= 2913 .1z -0.804
Fn= 11566 z -0.735
Fn= 12807 z -0.568
DEPTH (m)
N - FLUX (μmol N· d-1 · m-2)
II. Sec ions
0 500 1000 1500 2000
NAM007 Fn= 10636 z -0.735
NAM009 Fn= 10292 z -0.643
N - FLUX
(μmol N · d-1 · m-2)
Resul s: Ni ogen

II. Sec ions
NAM017 Fn= 10197 z -0.403
NAM018 Fn= 14682 z -0.393
0 1000 2000 3000 4000
N - FLUX
(μmol N · d-1 · m-2)
Resul s: Ni ogen
II. Sec ions
NAM022 Fn= 14414 z -0.464
NAM024 Fn= 8862.8 z -0.469
0 600 1200 1800 2400 3000
N - FLUX
(μmol N · d-1 · m-2)
Resul s: Ni ogen
II. Sec ions
Zooplank on associa ed N lux p o ile
along he sec ion
Resul s: Ni ogen
Zooplank on associa ed C luxes, based on a e age alues o ETS
ac i i ies on he 4 sec ions. Compa ison o 4 a eas wi hin he sec ion.
NAM002 & 003
NAM007
NAM017
NAM022 & 023
II. Sec ions: Ca bon
II. Sec ions
NAM002 Fc= 114045 z -1.203
NAM003 Fc= 126793 z -1.069
C - FLUX
0 2000 4000 6000 8000
(μmol C · d-1 · m-2)
Resul s: Ca bon

II. Sec ions
NAM007 Fc= 116264 z -0.679
0 5000 10000 15000 20000
(μmol C · d-1 · m-2)
C - FLUX
Resul s: Ca bon
II. Sec ions
NAM017 Fc = 90231 z -1.098
0 2000 4000 6000
C - FLUX
(μmol C · d-1 · m-2)
Resul s: Ca bon
II. Sec ions
NAM022 Fc= 60173 z -0.693
NAM023 Fc= 75534 z -0.66
0 2500 5000 7500 10000
C - FLUX
(μmol C · d-1 · m-2)
Resul s: Ca bon
II. Sec ions
Zooplank on associa ed C lux p o ile
along he sec ion
Resul s: Ca bon
Resul s I. Moo ings s a ions
Ca bon
Zooplank on
■ Moo ing da a
■ C lux model
Mic oplank on
0
500
1000
1500
2000
2500
NAM006
NAM011 (7 Sep .)
NAM011 (17 Sep .)
μmol C · d-1 · m-2
0
1000
2000
3000
4000
5000
NAM006
NAM011 (7 Sep .)
NAM011 (17 Sep .)
μmol C · d-1 · m-2