Abstract:

Hydrographic and water column data were collected during a cruise to the Hercules 265 site using a CTD-rosette system aboard the R/V Acadiana. We characterized the physical and chemical properties in the water column at/near the rig in the immediate aftermath of its blowout. The ship departed Cocodrie LA on 07/27/2013 for a day cruise, then returned to the rig on 07/29/2013 - 07/30/2013. A second visit on 25 August by the R/V Weatherbird provided additional hydrographic and chemical data from the water column.

Suggested Citation:

joseph Montoya. 2016. Hercules Spill Response Cruises, Water Chemistry. Louisiana South Timbalier Block 220, 27-30 July (R/V Acadiana) and 25 August (R/V Weatherbird) 2013. Distributed by: GRIIDC, Harte Research Institute, Texas A&M University–Corpus Christi. doi:10.7266/N7125QNH

Publications:

Weber, S. C., Battles, J. J., Peterson, L., Roberts, B. J., Peterson, R. N., Hollander, D. J., … Montoya, J. P. (2015). Hercules 265 Rapid Response: Immediate ecosystem impacts of a natural gas blowout incident. Deep Sea Research Part II: Topical Studies in Oceanography. doi:10.1016/j.dsr2.2015.11.010

Purpose:

Characterization of physical and chemical properties in the water column at/near the Hercules 265 rig in the days and weeks following its blowout.

Data Parameters and Units:

Nutrient concentrations: µmol/L Methane concentrations: nmol/L Ra activity: dpm/m3 Rates: nmol/L/d delta-13C: per-mil deviation from VPDB delta-15N: per-mil deviation from atmospheric N2. Weatherbird-WaterColumnChemistry.xls -- Cruise: research vessel; Cast: numeric; Station: numeric; Bottle: count; Date: Month DD YYYY; Time: hh:mm:ss; Sbeox0: Mm/L; Oxsat: Oxygen Saturation Weiss (Mm/Kg); DepSM: Depth salt water (m); DepSM-SD: Depth salt water (m) where SD is standard deviation error; PrSM: CTD pressure in decibars; PrSM-SD: CTD pressure in decibars where SD is standard deviation error; T090C: Temperature ITS-90 (degrees Celsius); T090C-SD: Temperature Difference ITS-90 (degrees Celsius); C0S/m: Conductivity (S/m); C0S/m-SD: Conductivity Difference (S/m); Sal00: salinity practical (psu); Sal00-SD: salinity practical (psu) where SD is standard deviation error; Sbeox0V: V5 V5-SD Sbeox1V Oxygen raw SBE 43 2 (V); Sbeox0V-SD: V5 V5-SD Sbeox1V Oxygen raw SBE 43 2 (V) where SD is standard deviation error; Sbeox0: Mm/L; Sbeox0: Mm/L ; Oxsat: Oxygen Saturation Weiss (Mm/Kg); Oxsat-SD: Oxygen Saturation Weiss (Mm/Kg) where SD is standard deviation error; AltM: AltM-SD V3 Voltage 3 V3-SD Par PAR/Irradiance, Biospherical/Licor Par-SD V4 Voltage 4 V4-SD Sbeox0V Oxygen raw SBE 43 (V); AltM-SD: AltM-SD V3 Voltage 3 V3-SD Par PAR/Irradiance, Biospherical/Licor Par-SD V4 Voltage 4 V4-SD Sbeox0V Oxygen raw SBE 43 (V) where SD is standard deviation error; FlECO-AFL: Spar SPAR/Surface Irradiance Spar-SD NUTS Mean PO4 Mean Si Mean NO3+NO2 Mean N* PARTICLES d15N d13C C:N Total N (µmol/L); FlECO-AFL-SD: Spar SPAR/Surface Irradiance Spar-SD NUTS Mean PO4 Mean Si Mean NO3+NO2 Mean N* PARTICLES d15N d13C C:N Total N (µmol/L) where SD is standard deviation error; WetCDOM: fluorescence (mg/m^3); WetCDOM-SD: fluorescence (mg/m^3) where SD is standard deviation error; Latitude: decimal degrees; Latitude-SD: decimal degrees where SD is standard deviation error; Longitude: decimal degrees; Longitude-SD: decimal degrees where SD is standard deviation error; Par: Photosynthetically Active Radiation; Par-SD: Photosynthetically Active Radiation where SD is standard deviation error; TurbWETntu0: Turbidity, WET Labs ECO [NTU]; TurbWETntu0-SD: Turbidity, WET Labs ECO [NTU] where SD is standard deviation error; Scan: count; Scan-SD: count where SD is standard deviation error; Methane Avg : nM; Methane SD: nM where SD is standard deviation error; Acadiana-WaterColumnChemistry.xls -- Cruise: research vessel; Station: numerical; Event: numerical ID; Latitude: decimal degrees; Longitude: decimal degrees; Date: Month DD YYYY; Month: MM; Day: DD; Year: YYYY; Bottle: count; Time : hh:mm:ss; Depth : m; Depth-SD: m where SD is standard deviation error; Density: kg/m^3; Sigma-t: Kg/m^3; Salinity: ppt; Salinity-SD: ppt where SD is standard deviation error; Temp : 0C; Temp-SD: oC where SD is standard deviation error; SBE O2 : umol/kg; SBE O2-SD: umol/kg; O2 Solubility : umol/kg; SBE O2 : mg/L; SBE O2 : umol/L; Scan: count; Mean Depth : m; Mean Depth-SD: m where SD is standard deviation error; Mean Salinity: m ppt; Mean Salinity-SD: m ppt where SD is standard deviation error; Mean Temperature : oC; Mean Temperature-SD: oC where SD is standard deviation error; Mean O2 : umol/kg; Mean O2-SD: umol/kg where SD is standard deviation error; Mean O2 : mg/L; Mean O2-SD: mg/L where SD is standard deviation error; Mean O2 : umol/L; Mean O2-SD: umol/L where SD is standard deviation error; PO4 : uM; Si : uM; NO3+NO2 : uM; NO2: uM; N*: ; d15N : ‰; d13C: ‰; Total N : µM; Total C: µM; C:N: ; CH4 : nM; d13C-CH4: ‰; <10 RhoN : nmol/L/d; <10 RhoC : nmol/L/d; >10 RhoN : nmol/L/d; >10 RhoC: nmol/L/d; RhoN-Total : nM/d; RhoC-Total : nM/d; R rate : umol O2 L-1 d-1; Initial DO : umol L-1; Ra-224 : dpm/m3; Ra-226 : dpm/m4; 224/226 AR: ; 224/226 Age : days; Weatherbird-BinnedProfiles.xls -- Cruise: research vessel; Station: numeric; PrSM: Pressure, Strain Gauge [db]; T090C: Temperature ITS-90 (degrees Celsius); C0S/m: Conductivity (S/m); Sbeox0V: Oxygen Voltage, SBE 43; AltM: AltM-SD V3 Voltage 3 V3-SD Par PAR/Irradiance, Biospherical/Licor Par-SD V4 Voltage 4 V4-SD Sbeox0V Oxygen raw SBE 43 (V); FlECO-AFL: Spar SPAR/Surface Irradiance Spar-SD NUTS Mean PO4 Mean Si Mean NO3+NO2 Mean N* PARTICLES d15N d13C C:N Total N (µmol/L); WetCDOM: Fluorescence - Wetlab CDOM (mg/m^3); Latitude: decimal degrees; Longitude: decimal degrees; Par: Photosynthetically Available [Active] Radiation (uE/cm^2/sec); TurbWETntu0: Turbidity, WET Labs ECO [NTU]; DepSM: Depth [salt water, m]; Density00: Density [density, Kg/m^3]; Sigma-È00: Density sigma-theta (Kg/m^3); Sbeox0: Mm/L; Sbeox0PS: Oxygen, SBE 43 [% saturation]; Sal00: salinity practical (psu); OxsatMm/Kg: Oxygen Saturation Weiss (Mm/Kg);

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