Thorsten B H Reusch
Reusch
Thorsten B H
GEOMAR - Helmholtz Centre for Ocean Research Kiel
GEOMAR
Felix Mittermayer-Schmittmann
Mittermayer-Schmittmann
Felix
Julia Finke
Finke
Julia
Andreas Lehmann
Lehmann
Andreas
Physical oceanography during ALKOR cruise AL594
PANGAEA
Data Publisher for Earth & Environmental Science
dataset
Conductivity-temperature-depth profiles were measured using a ADM-CTD SN MOCNET during RV ALKOR cruise AL594. The CTD was equipped with duplicate sensors for temperature, conductivity and oxygen. The oxygen sensor (galvanic oxygen micro-sensor (AMT)) was exchanged in the beginning of the year. The sensors are used throughout the year and no post-cruise calibration is applied. All other sensors of the CTD are calibrated irregularly. Data were connected to the station book of the specific cruise as available in the DSHIP database. […]
Conductivity-temperature-depth profiles were measured using a ADM-CTD SN MOCNET during RV ALKOR cruise AL594. The CTD was equipped with duplicate sensors for temperature, conductivity and oxygen. The oxygen sensor (galvanic oxygen micro-sensor (AMT)) was exchanged in the beginning of the year. The sensors are used throughout the year and no post-cruise calibration is applied. All other sensors of the CTD are calibrated irregularly. Data were connected to the station book of the specific cruise as available in the DSHIP database. This dataset presents conductivity–temperature–depth (CTD) profiles collected during the research cruise. The data were processed using a custom Python workflow designed to summarize, standardize, and prepare CTD measurements for publication. Raw sensor output files (.TOB format) were parsed using a dedicated reader that extracts header metadata and harmonizes variable naming conventions across all profiles. Quality control procedures included the removal of non-physical values, treatment of missing or malformed entries, and consistency checks across key variables such as pressure, temperature, conductivity, and derived parameters (e.g., salinity and oxygen). Oxygen values were scaled, and salinity values were corrected according to the respective CTD calibration. Sensor channels were standardized and renamed to ensure compatibility with common data standards. Geographic coordinates were converted from degrees and minutes to decimal degrees to improve geospatial usability. Pressure was linearly interpolated to a uniform 1 dbar grid, and all depth-dependent parameters were interpolated accordingly. Maximum recorded pressure was cross-checked against local bathymetry (elevation); in cases of mismatch, profiles were truncated at the maximum depth of the corresponding location. The workflow further includes visual quality control of oxygen saturation, station locations, and vertical profiles of temperature, salinity, and oxygen.
AL594
Baltic Cod, Cruise No. AL594, 13 May - 27 May 2023, Kiel (Germany) - Kiel (Germany)
24 pp
Alkor-Berichte, GEOMAR Helmholtz Centre for Ocean Research, Research Division Marine Ecology/Marine Evolutionary Ecology, Kiel, Germany
report
data points
Event label
Station label
DATE/TIME
Time
LATITUDE
LONGITUDE
Sample elevation
Length
Date/Time local
Pressure, water
dbar
CTD
Pressure
water
Energy Density
Force Per Area
CTD & XBT
Temperature, water
Temperature
Salinity
salinity
Conductivity
mS/cm
conductivity
Oxygen
µmol/l
oxygen
Molar Concentration
Oxygen saturation
Dimensionless Ratio
Baltic Sea; CTD casts; RV ALKOR; Timeseries
unrestricted
text/tab-separated-values
text/html