ISO_DateTime_UTC 
Date and time (UTC) formatted to ISO8601 standard (YYYYMMDDThh:mm:ssZ)

unitless 
ISO_DateTime_UTC 
Station 
Station ID

unitless 
station 
Cast 
Sequential CTD cast number

unitless 
cast 
Target_Depth 
Target sampling depth

meters 
depth 
Niskin 
Bottle number on CTD rosette

unitless 
bot 
Latitude 
Latitude at start of CTD deployment; South is negative

decimal degrees 
lat 
Longitude 
Longitude at start of CTD deployment; West is negative

decimal degrees 
lon 
CTD_Pressure 
Pressure

decibars 
press 
CTD_Depth 
Depth

meters 
depth 
Sigma_theta 
Potential density

kilogram per cubic meter (kg/m^3) 
sigma_0 
Salinity 
Salinity

practical salinity units (psu) 
sal 
PAR 
Photosynthetically active radiation

micro Einsteins per squared meter (µE/m^2) 
PAR 
Seabird_Oxygen 
Oxygen from Seabird oxygen sensor

micromoles per liter (µmol/L) 
O2 
Temperature 
Water temperature

degrees Celsius 
temp 
Nitrite 
Concentration of nitrite

micromoles per liter (µmol/L) 
NO2 
Nitrate_Sample_ID 
Sample identifier for nitrate isotopes

unitless 
sample 
Sulfamic_treated 
Whether nitrate isotope sample was sulfamictreated: 1=yes, 0=no

unitless 
treatment 
NO3_rep1 
Concentration of nitrate, first replicate analysis of same sample

micromoles per liter (µmol/L) 
NO3 
NO3_rep2 
Concentration of nitrate, second replicate analysis of the same sample

micromoles per liter (µmol/L) 
NO3 
NO3_rep3 
Concentration of nitrate, third replicate analysis of the same sample

micromoles per liter (µmol/L) 
NO3 
NO3_mean 
Concentration of nitrate, average of replicate analyses

micromoles per liter (µmol/L) 
mean 
NO3_std 
Concentration of nitrate, standard deviation of replicate analyses

micromoles per liter (µmol/L) 
std_dev 
d18O_NO3_meas1 
delta18O of nitrate, first replicate analysis of the same sample

per mil vs. VSMOW 
d18O_NO3 
d18O_NO3_meas2 
delta18O of nitrate, second replicate analysis of the same sample

per mil vs. VSMOW 
d18O_NO3 
d18O_NO3_meas3 
delta18O of nitrate, third replicate analysis of the same sample

per mil vs. VSMOW 
d18O_NO3 
d18O_NO3_avg 
delta18O of nitrate, average of replicate analyses

per mil vs. VSMOW 
mean 
d18O_NO3_stdev 
delta18O of nitrate, standard deviation of replicate analyses

per mil vs. VSMOW 
std_dev 
d15N_NO3_meas1 
delta15N of nitrate, first replicate analysis of the same sample

per mil vs. atmospheric N2 
dN15_NO3 
d15N_NO3_meas2 
delta15N of nitrate, second replicate analysis of the same sample

per mil vs. atmospheric N2 
dN15_NO3 
d15N_NO3_meas3 
delta15N of nitrate, third replicate analysis of the same sample

per mil vs. atmospheric N2 
dN15_NO3 
d15N_NO3_avg 
delta15N of nitrate, average of replicate analyses

per mil vs. atmospheric N2 
mean 
d15N_NO3_stdev 
delta15N of nitrate, standard deviation of replicate analyses

per mil vs. atmospheric N2 
std_dev 
d18O_NO2_rep1 
delta18O of nitrite, first distinct replicate sample

per mil vs. VSMOW 
delta18O 
d18O_NO2_rep2 
delta18O of nitrite, second distinct replicate sample

per mil vs. VSMOW 
delta18O 
d18O_NO2_avg 
delta18O of nitrite, average of replicates

per mil vs. VSMOW 
mean 
d15N_NO2_rep1 
delta15N of nitrite, first distinct replicate sample

per mil vs. atmospheric N2 
d15N 
d15N_NO2_rep2 
delta15N of nitrite, second distinct replicate sample

per mil vs. atmospheric N2 
d15N 
d15N_NO2_avg 
delta15N of nitrite, average of replicates

per mil vs. atmospheric N2 
d15N 
N2O_sat 
Saturation concentration of nitrous oxide, calculated from Weiss and Price (1980)

nanomoles per liter (nmol/L) 
N2O 
N2O_rep1 
Concentration of nitrous oxide, first distinct replicate sample

nanomoles per liter (nmol/L) 
N2O 
N2O_rep2 
Concentration of nitrous oxide, second distinct replicate sample

nanomoles per liter (nmol/L) 
N2O 
N2O_mean 
Concentration of nitrous oxide, average of replicate samples

nanomoles per liter (nmol/L) 
mean 
N2O_std 
Concentration of nitrous oxide, standard deviation of replicate samples

nanomoles per liter (nmol/L) 
std_dev 
N2O_supersaturation_rep1 
Supersaturation of nitrous oxide, equal to actual nitrous oxide concentration minus saturation concentration, for first replicate concentration measurement

nanomoles per liter (nmol/L) 
N2O 
N2O_supersaturation_rep2 
Supersaturation of nitrous oxide, equal to actual nitrous oxide concentration minus saturation concentration, for second replicate concentration measurement (n=2)

nanomoles per liter (nmol/L) 
N2O 
N2O_supersaturation_mean 
Mean supersaturation of nitrous oxide, equal to actual nitrous oxide concentration minus saturation concentration

nanomoles per liter (nmol/L) 
mean 
N2O_supersaturation_std 
Standard deviation of supersaturation of nitrous oxide, equal to actual nitrous oxide concentration minus saturation concentration

nanomoles per liter (nmol/L) 
std_dev 
d18O_N2O_rep1 
delta18O of nitrous oxide, first distinct replicate sample

per mil vs. VSMOW 
delta18O 
d18O_N2O_rep2 
delta18O of nitrous oxide, second distinct replicate sample

per mil vs. VSMOW 
delta18O 
d18O_N2O_mean 
delta18O of nitrous oxide, average of replicate samples

per mil vs. VSMOW 
mean 
d18O_N2O_std 
delta18O of nitrous oxide, standard deviation of replicate samples

per mil vs. VSMOW 
std_dev 
d15N_alpha_N2O_rep1 
delta15Nalpha of nitrous oxide, first distinct replicate sample

per mil vs. atmospheric N2 
d15N 
d15N_alpha_N2O_rep2 
delta15Nalpha of nitrous oxide, second distinct replicate sample

per mil vs. atmospheric N2 
d15N 
d15N_alpha_N2O_mean 
delta15Nalpha of nitrous oxide, average of replicates

per mil vs. atmospheric N2 
d15N 
d15N_alpha_N2O_std 
delta15Nalpha of nitrous oxide, standard deviation of replicates

per mil vs. atmospheric N2 
d15N 
d15N_beta_N2O_rep1 
delta15Nbeta of nitrous oxide, first distinct replicate sample

per mil vs. atmospheric N2 
d15N 
d15N_beta_N2O_rep2 
delta15Nbeta of nitrous oxide, second distinct replicate sample

per mil vs. atmospheric N2 
d15N 
d15N_beta_N2O_mean 
delta15Nbeta of nitrous oxide, average of replicate samples

per mil vs. atmospheric N2 
mean 
d15N_beta_N2O_std 
delta15Nbeta of nitrous oxide, standard deviation of replicate samples

per mil vs. atmospheric N2 
std_dev 
d15N_N2Obulk_rep1 
delta15Nbulk of nitrous oxide, first distinct replicate sample

per mil vs. atmospheric N2 
d15N 
d15N_N2Obulk_rep2 
delta15Nbulk of nitrous oxide, second distinct replicate sample

per mil vs. atmospheric N2 
d15N 
d15N_N2Obulk_mean 
delta15Nbulk of nitrous oxide, average of replicate samples

per mil vs. atmospheric N2 
mean 
d15N_N2Obulk_std 
delta15Nbulk of nitrous oxide, standard deviation of replicate samples

per mil vs. atmospheric N2 
std_dev 
SP_1 
Site preference of nitrous oxide, first replicate sample

per mil vs. atmospheric N2 
N2O 
SP_2 
Site preference of nitrous oxide, second replicate sample

per mil vs. atmospheric N2 
N2O 
SP_mean 
Site preference of nitrous oxide, average of replicates

per mil vs. atmospheric N2 
mean 
SP_std 
Site preference of nitrous oxide, standard deviation of replicates

per mil vs. atmospheric N2 
std_dev 
N2O_Flag_1 
Flag for first replicate N2O measurement: no flag=good, 3=questionable, 4=bad

unitless 
q_flag 
N2O_Flag_2 
Flag for second replicate N2O measurement: no flag=good, 3=questionable, 4=bad

unitless 
q_flag 