Underway measurements of dissolved gases along POLARSTERN cruise track ANT-XXVII/2 ...

We present measurements of pCO2, O2 concentration, biological oxygen saturation (Delta O2/Ar) and N2 saturation (Delta N2) in Southern Ocean surface waters during austral summer, 2010-2011. Phytoplankton biomass varied strongly across distinct hydrographic zones, with high chlorophyll a (Chla) conce...

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Bibliographic Details
Main Authors: Bittig, Henry, Körtzinger, Arne
Format: Dataset
Language:English
Published: PANGAEA 2015
Subjects:
DATE/TIME
LATITUDE
LONGITUDE
DEPTH, water
Temperature, water
Salinity
Pressure, atmospheric
Oxygen
Oxygen, partial pressure
Oxygen saturation
Pressure, total, dissolved gases
Nitrogen, total dissolved
Nitrogen, partial pressure
Nitrogen saturation
Underway cruise track measurements
Thermosalinograph
Ships weather station
Oxygen optode, Aanderaa, type 3830
derived
Gas Tension Device
ANT-XXVII/2
Polarstern
OCEANET OCEANET
Sea ice
Southern Ocean
Online Access:https://dx.doi.org/10.1594/pangaea.848615
https://doi.pangaea.de/10.1594/PANGAEA.848615
Description
Summary:We present measurements of pCO2, O2 concentration, biological oxygen saturation (Delta O2/Ar) and N2 saturation (Delta N2) in Southern Ocean surface waters during austral summer, 2010-2011. Phytoplankton biomass varied strongly across distinct hydrographic zones, with high chlorophyll a (Chla) concentrations in regions of frontal mixing and sea-ice melt. pCO2 and Delta O2 /Ar exhibited large spatial gradients (range 90 to 450 µatm and -10 to 60%, respectively) and co-varied strongly with Chla. However, the ratio of biological O2 accumulation to dissolved inorganic carbon (DIC) drawdown was significantly lower than expected from photosynthetic stoichiometry, reflecting the differential time-scales of O2 and CO2 air-sea equilibration. We measured significant oceanic CO2 uptake, with a mean air-sea flux (~ -20 mmol m-2 d-1) that significantly exceeded regional climatological values. N2 was mostly supersaturated in surface waters (mean Delta N2 of +2.5 %), while physical processes resulted in both ... : Supplement to: Tortell, Philippe Daniel; Bittig, Henry; Körtzinger, Arne; Jones, Elizabeth M; Hoppema, Mario (2015): Biological and physical controls on N2, O2, and CO2 distributions in contrasting Southern Ocean surface waters. Global Biogeochemical Cycles, 29(7), 994-1013 ...

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