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Croot, Peter L; Passow, Uta; Assmy, Philipp; Jansen, Sandra; Strass, Volker H (2014): Surface active substances in the water column during POLARSTERN cruise ANT-XXI/3 (EIFEX). doi:10.1594/PANGAEA.832535,
Supplement to: Croot, PL et al. (2007): Surface active substances in the upper water column during a Southern Ocean Iron Fertilization Experiment (EIFEX). Geophysical Research Letters, 34(3), L03612, doi:10.1029/2006GL028080

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Abstract:
Surface active substances (SAS) in the water column were measured by voltammetry using the electrochemical probe o-nitrophenol (ONP) during EIFEX, a mesoscale open ocean iron enrichment experiment in the Southern Ocean. SAS levels were low throughout the experiment (<0.005 - 0.03 mg/L Triton X-100 equivalents). Initially SAS was extremely low in the photic zone, but as the phytoplankton bloom developed concentrations markedly increased throughout the upper 100 m (~0.02 mg/L Triton X-100 equivalents). Highest concentrations of SAS (>0.02 mg/L Triton X-100 equivalents) were found at the end of the bloom particularly at density discontinuities where organic material may accumulate. Exudates from diatoms appeared to be the major source of SAS during EIFEX, either from direct extracellular release or in the action of being grazed upon by zooplankton.
Coverage:
Median Latitude: -49.299280 * Median Longitude: 2.220720 * South-bound Latitude: -49.477500 * West-bound Longitude: 2.005300 * North-bound Latitude: -49.131000 * East-bound Longitude: 2.455000
Date/Time Start: 2004-02-22T07:40:00 * Date/Time End: 2004-03-16T02:19:00
Minimum DEPTH, water: 20 m * Maximum DEPTH, water: 300 m
Event(s):
PS65/508-1 * Latitude: -49.203700 * Longitude: 2.005300 * Date/Time: 2004-02-22T07:40:00 * Elevation: -3900.0 m * Location: South Atlantic Ocean * Campaign: ANT-XXI/3 (PS65 EIFEX) * Basis: Polarstern * Device: Go-Flo bottles (GOFLO)
PS65/514-1 * Latitude: -49.255000 * Longitude: 2.336300 * Date/Time: 2004-02-29T17:46:00 * Elevation: -3824.0 m * Location: South Atlantic Ocean * Campaign: ANT-XXI/3 (PS65 EIFEX) * Basis: Polarstern * Device: Go-Flo bottles (GOFLO)
PS65/543-9 * Latitude: -49.477500 * Longitude: 2.455000 * Date/Time: 2004-03-04T06:35:00 * Elevation: -3860.0 m * Location: South Atlantic Ocean * Campaign: ANT-XXI/3 (PS65 EIFEX) * Basis: Polarstern * Device: Go-Flo bottles (GOFLO)
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethodComment
1Event labelEvent
2CommentCommentIn/Out patch
3Date/Time of eventDate/Time
4Latitude of eventLatitude
5Longitude of eventLongitude
6Elevation of eventElevationm
7DEPTH, waterDepth watermGeocode
8Surface active substancesSASmg/lCroot, Peter LVoltammetryTriton X-100 equivalents
9Surface active substances, standard deviationSAS std dev±Croot, Peter LVoltammetry1 sigma
Size:
144 data points

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