Type of Sampling Data
Vertical profiling data of CTD-water-sampler on position SB_POG during EDoM’18 measurement campaign
Contact
Michaela Gerriets, University of Oldenburg, ICBM
michaela.gerriets@uni-oldenburg.de
Thomas Badewien, University of Oldenburg, ICBM
thomas.badewien@uni-oldenburg.de
Location

Position SB_POG, WGS84 approx. 53.32420 °(N)  7.25942 °(E)

Time / Date
28th August 2018 between 07:09 and 21 :30 CET 


Instrument setup
CTD-Water-Sampler
Parameter
Instrument
S/N
Temperature
Conductivity
Sea-Bird Electronics SBE19plusV2
7245
Pressure

Sea-Bird Electronics
SBE19P
7938
Turbidity
Chlorophyll
CDOM
Turner Designs 
Scufa
0773
Altimeter

Benthos
PSA916
4711


CTD-Water-Sampler 





Measurements
In total 42 vertical CTD-profiles were taken during the EDoM’18 measurement campaign. The time interval between the CTD-measurements was 30 minutes and 15 minutes around slack water. 
In total 28 water samples from the water surface (0,8 m) and bottom (1,5 m above) were taken. 


Temperature
Salinity



Density
SPM (Suspended Particulate Matter) 



Data Processing of CTD measurements 
1. SBE-Data Processing Software Version 7.26.7
1.1 Data Conversion: Convert raw data (.hex) to converted data (.cnv)
* Output variables:
1. Julian Days
2. Latitude (deg)
3. Longitude (deg)
4. Pressure (dbar)
5. Depth (m)
6. Temperature (ITS-90, °C)
7. Conductivity (mS/cm)
8. Salinity (PSU)
9. Density (Sigma-Theta, kg/m³)
10. Oxygen Saturation, Weiss (mg/l)

* Output format: ASCII (.cnv file)
* Only data from downcast profiles were converted
1.2. LoopEdit:  Marks value in data-matrix with bad flag if the pressure of the vertical profile slowdowns or reversals. 
* Minimum CTD-velocity 0.05 m/s
* Minimum soak depth: 1.0 m
* Maximum soak depth: 20 
2. Matlab Processing Tool
2.1. Clear Data-Matrix: Delete data with bad flag
2.2. Calculating mean values and standard derivation: Averaging every 20 cm  
2.3. Create Final Data-Matrix: Output format .txt
* Output variables:
1. Year
10. Std. Mean Temperature (°C)
2. Month
11. Mean Conductivity (mS/cm)
3. Day
12. Std. Mean Conductivity (mS/cm)
4. Hour
13. Mean Salinity (PSU)
5. Minute
14. Std. Mean Salinity (PSU)
6. Second
15. Mean Density (Sigma-Theta, kg/m³)
7. Latitude (°) / WGS84
16. Std. Mean Density (Sigma-Theta, kg/m³)
8. Longitude (°)/ WGS84
17. Mean Oxygen Saturation, Weiss (mg/l)
9. Mean Temperature (°C)
18. Std. Mean Oxygen Saturation, Weiss (mg/l)

Storage of Data Files
Name:
Edom2018_CTD_SBE_ZE1808_3_xx
Location: 
0:/2018_August/01_Campaign/SB_POG_ICBM/CTD_Zephyr_ICBM/processed/
