Readme_bowhound

The bowhound system was an underway pCO2 system that was installed at the
seachest. The prototype system used a low cost Li-COR Gas Hound and a Liqui
Cell membrane extractor ("beer gasser") which was used to equilibrate
headspace and water. The unit was not temperature controlled and operated
well under harsh conditions.

The Liquicell extractor was run at a slight overpressure (about 2 %). This
pressure was not accurately measured and appears  the largest source of
uncertainty in the analysis.

The system gathered data every two minutes and two gas standards were used
for a (linear calibration). Standards were run every hour.  The first
sample after the standard reads low because of the flow configuration and is
omitted

Columns
PC_DATE= date
PC_TIME = time
YEAR_DAY = Julian day from PC computer (applies to XCO2 values)
SHIP_JD= Julian day from ship SCS (applies to salinity and temperature
values)
DecLat = latitude
DecLong= longitude
xCO2(27.3)bowhound= xCO2 normalized to 27.3 using a relationship of 4.23 %
per degree
EQ_TEMP= temperature at the intake of the liquicell
AdjLin_xCO2= measured xCO2
SCS_T= thermosalinograph temperature
SCS_Sal = thermosalinograph salinity
Sys2.6xCO2 = XCO2 from system in main lab

Note there are no latitudes and longitude values for the last 1000 entries
after the ship left the study area.