Ocean Carbon and Biogeochemistry: Data System

MedFlux cruise: EN402 March 2005
HPSS CTD rosette bottle data processing notes

31 January 2006: Prepared for OCB data system by Terry McKee (PO Dept, WHOI) and Cyndy Chandler, OCB DMO (WHOI).

HPSS CTD station data were processed using the standard set of Seabird utilities, and the final base Niskin bottle sample data file was then created from the HPSS CTD station *.btl files.

Final HPSS CTD station 313 (as in date 050313) header record showing history of HPSS CTD processing steps during which *.btl files were created:
EN402_hpss050313_hdr.txt

Final Niskin bottle file header record from .btl file:
HPSS_050313_hdr.txt

Station location is from NMEA latitude and longitude recorded in HPSS CTD station header record at acquisition time. A maximum of 12 bottles were fired on each station.

Some parameters were calculated using MATLAB Physical Properties of Seawater Toolbox:

Depth   [ sw_dpth.m ]

depth=sw_dpth(data.prs,43);   % latitude fixed at 43 ° N

Density   [ sw_dens.m ]

sigma-t=sw_dens(data.ctdsal1,data.ctdtmp1,data.ctdprs,0)-1000;

Potential Density   [ sw_pden.m ]

sigma_0=sw_pden(data.ctdsal1,data.ctdtmp1,data.ctdprs,0)-1000;

Potential Temperature   [ sw_ptmp.m ]

potemp=sw_ptmp(data.ctdsal1,data.ctdtmp1,data.ctdprs,0);

Details of HPSS CTD data processing steps:

are available with the HPSS CTD data from this cruise