RB-09-05 Lophelia II Readme File
  
Ship:                   NOAA research vessel Ronald H. Brown 
Cruise Start:           Key West, FL, Aug. 19, 2009 
Cruise End:             Pensacola, FL, Sept. 12, 2009 
Chief Scientists:       Charles Fisher 
System Operator:        Jonathan Shannahoff
Expocode:               33RO20090819 

Method: 
The system was built by General Oceanics (GO) and is described in  
Pierrot, et al. (2009).

The three standard gases come from CMDL in Boulder and are directly 
traceable to the WMO scale.  

Sampling Cycle: 
The system runs on an cycle during which 4 standard gases, 5 air  
samples from the bow tower and 50 surface water samples (from the  
equilibrator head space) are analyzed on the following schedule:   

1. Zero and span of Licor 
2. Four standard gases 
3. Five air samples 
4. Fifty equilibrator headspace gas samples 
5. Repeat steps 2 - 4 nine more times 
6. Restart from step 1  

Standards:  CA6709: 284.75 ppm, CA2813: 363.24 ppm, CA9721: 423.57 ppm, 
CA7931: 545.88 ppm.  

Units: All xCO2 values are reported in parts per million (ppm) and 
fCO2 values are reported in microatmospheres (uatm) assuming 100 % 
humidity at the equilibrator temperature.  

Notes: 

1. Salinity readings from the ship's TSG were bad.  Readings from the 
Seabird Micro TSG connected to the analytical system were used instead.

2. An offset of 4.13 minutes was applied to SST data from the ship's 
computer system.  

3. January 2017 made minor format changes to the header, added expocode and changed missing value to -999. Data was not altered.  

For questions or comments contact: 
Bob Castle 
4301 Rickenbacker Causeway 
Miami, FL 33149 
305-361-4418 
robert.castle@noaa.gov 

Pierrot, D., C. Neil, K. Sullivan, R. Castle, R. Wanninkhof, H. Lueger, 
T. Johannson, A. Olsen, R. A. Feely, and C. E. Cosca (2009),
Recommendations for autonomous underway pCO2 measuring systems 
and data reduction routines, Deep-Sea Res II, 56, 512-522.