sample 
Sample ID number.

dimensionless 
sample 
date 
Month, day, and year of sampling (GMT).

mm/dd/yy 
date 
month 
2digit month of year.

mm (01 to 12) 
month 
day 
2digit day of month.

dd (01 to 31) 
day 
year 
4digit year.

YYYY 
year 
time 
Time (GMT), in hours, minutes, and decimal minutes, of sampling.

HHMM.mm 
time 
lat 
Latitude in decimal degrees North. (Negative values = South).

decimal degrees 
lat 
lon 
Longitude in decimal degrees East.

decimal degrees 
lon 
depth 
Sample depth.

meters 
depth 
NO3_NO2_mean 
Mean nitrate (NO3) plus nitrite (NO2) concentration of a sample in micromolar units.

micromolar (uM) 
no_bcodmo_term 
NO3_NO2_stdev 
Standard deviation of the nitrate (NO3) plus nitrite (NO2) concentration of a sample in micromolar units.

micromolar (uM) 
std_dev 
d15N_NO3_NO2_mean 
delta 15N of NO3+NO2. d15N (‰ vs. AIR) is the nitrogen isotopic composition of a sample expressed in delta notation (in units of per mil) relative to atmospheric N2, where delta 15N = {[ (15N/14N)sample / (15N/14N)atmN2 ] – 1} × 1000.

per mil 
no_bcodmo_term 
d15N_NO3_NO2_stdev 
Standard deviation of d15N_NO3_NO2_mean.

per mil 
std_dev 
d18Ocorr_NO3_NO2_mean 
delta 18O of NO3+NO2. d18O (‰ vs. VSMOW) is the oxygen isotopic composition of a sample expressed in delta notation (in units of per mil) relative to Vienna Standard Mean Ocean Water (VSMOW), where delta 18O = {[ (18O/16O)sample / (18O/16O)VSMOW ] – 1} × 1000.

per mil 
no_bcodmo_term 
d18O_NO3_NO2_stdev 
Standard deviation of d18O_NO3_NO2_mean.

per mil 
std_dev 
NO3_mean 
Mean nitrate (NO3) concentration of a sample in micromolar units, measured after nitrite (NO2) had been removed (using the protocol of Granger and Sigman (2009)).

micromolar (uM) 
no_bcodmo_term 
NO3_stdev 
Standard deviation of the nitrate (NO3) concentration of a sample in micromolar units, measured after nitrite (NO2) had been removed (using the protocol of Granger and Sigman (2009)).

micromolar (uM) 
std_dev 
d15N_NO3_mean 
delta 15N of NO3. d15N (‰ vs. AIR) is the nitrogen isotopic composition of a sample expressed in delta notation (in units of per mil) relative to atmospheric N2, where delta 15N = {[ (15N/14N)sample / (15N/14N)atmN2 ] – 1} × 1000.

per mil 
no_bcodmo_term 
d15N_NO3_stdev 
Standard deviation of d15N_NO3_mean.

per mil 
std_dev 
d18O_NO3_mean 
delta 18O of NO3. d18O (‰ vs. VSMOW) is the oxygen isotopic composition of a sample expressed in delta notation (in units of per mil) relative to Vienna Standard Mean Ocean Water (VSMOW), where delta 18O = {[ (18O/16O)sample / (18O/16O)VSMOW ] – 1} × 1000.

per mil 
no_bcodmo_term 
d18O_NO3_stdev 
Standard deviation of d18O_NO3_mean.

per mil 
std_dev 
ISO_DateTime_UTC 
Date and time (UTC) formatted to ISO 8601 standard, where T indicates the start of the time string and Z indicates UTC.

YYYYmmddTHH:MM:SS.xxZ 
ISO_DateTime_UTC 