RB-03-03
Kick'em Jenny Volcano Readme File

Ship:			NOAA research vessel Ronald H. Brown
Cruise Start:		San Juan, Puerto Rico, March 10, 2003
Cruise End:		Charleston, South Carolina, March 28, 2003
Chief Scientist:	Haraldur Sigurdsson
System Operator:	Jonathan Shannahoff
Expocode:               33RO20030310

Method:
Infrared absorption of dried gas.  For details of the system see: 
Measurement of fugacity of Carbon Dioxide in surface water and air using continuous 
sampling methods.  Wanninkhof and Thoning, 1993 in Marine Chemistry 44, 189-205, 
And:
Feely, R.A., R. Wanninkhof, H.B. Milburn, C.E. Cosca, M. Stapp, and P.P. Murphy, 
A new automated underway system for making high precision pCO2 measurements 
onboard research ships, Analytica Chim. Acta, 377, 185-191, 1998.

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

Sampling Cycle:
The system runs on an hourly cycle during which 3 standard gases, 3 air 
samples from the bow tower and 8 surface water samples (from the 
equilibrator head space) are analyzed on the following schedule:

Mins. after hour		Sample
4				Low Standard
8				Mid Standard
12				High Standard
16.5			Water
21				Water
25.5			Water
30				Water
34				Air
38				Air
42				Air
46.5			Water
51				Water
55.5			Water
60				Water

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

Notes:
1.	Any values outside the range of the standards (295.37, 357.18, & 423.28 ppm) 
should be considered approximate (within 5 ppm).  While individual data points above 
423 or below 293 may not be accurate, the general trends should be indicative of the 
seawater chemistry.
2.  The seawater flow was turned off three times: from March 21 at 20:40 to March 22
at 19:40; from March 24 at 10:22 to March 24 at 18:52; and from March 25 at 17:36 to
March 26 at 14:00.  No surface water measurements were included from these time
periods.
3.  From March 21 at 22:40 to March 22 at 15:40 all air values were removed due to
probable contamination by stack gas.


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