Raw stable water isotope measurements in water vapour at 8 m a.s.l. on the port side of the ship, made in the austral summer of 2016/2017 during the Antarctic Circumnavigation Expedition (ACE). 

Data files: HBDS2190-${year}${month}${day}-${time:HHmmss}Z-DataLog_User.dat

File header

DATE: Date of measurement [UTC]        
TIME: Time of measurement hh:mm:ss [UTC]
FRAC_DAYS_SINCE_JAN1: Days since 1 January of the year of measurement
FRAC_HRS_SINCE_JAN1: Hours since 1 January of the year of measurement
JULIAN_DAYS: Continuous count of days of the year, including fraction for hours of the day
EPOCH_TIME: Number of seconds that have elapsed since January 1, 1970 [midnight UTC]
ALARM_STATUS: Alarm status of instrument
INST_STATUS: Instrument status
CavityPressure: Pressure in instrument cavity [Torr]
CavityTemp: Temperature in instrument cavity [degrees C]
WarmBoxTemp: Temperature in instrument warm box [degrees C]
DasTemp: Temperature in instrument case [degrees C]
EtalonTemp: Instrument temperature [degrees C] (not relevant)
species (not relevant)
MPVPosition: MPV position (not relevant)
OutletValve: Outlet valve flow rate
ValveMask: Mask denoting which valve was used for measurements
solenoid_valves (not relevant)
H2O: Water vapour mixing ratio [ppmv]
h2o_ppmv: Water vapour mixing ratio [ppmv]
Delta_18_16: Delta-values of 18O [per mill]
Delta_18_16_30s (not relevant)
Delta_18_16_2min (not relevant)
Delta_18_16_5min (not relevant)
Delta_D_H: Delta-values of deuterium (2H) [per mill]
Delta_D_H_30s (not relevant)
Delta_D_H_2min (not relevant)
Delta_D_H_5min (not relevant)
organic_82 (not relevant)
organic_MeOHampl (not relevant)
organic_base (not relevant)
organic_c2h6conc (not relevant)
organic_ch4conc (not relevant)
organic_res (not relevant)
organic_shift (not relevant)
organic_slope (not relevant)
organic_splinemax (not relevant)
organic_squish (not relevant)
organic_y (not relevant)
standard_base (not relevant)
standard_residuals (not relevant)
n2_flag: N2 flag (not relevant)


Where parameters are noted as (not relevant) these were measurement modes in which the instrument wasn't operated/set up during this expedition and should not be used.