Modeled vertical carbon and nitrogen fluxes in waters of Namibia

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