year |
Year in YYYY format.
|
dimensionless |
year |
TOC |
Total organic Carbon (micromolar). Data from the following cruises have not been analyzed: Sept 1997 (NH 45-85), Nov 1997 (NH 25-65, FM, CR and COC lines), Jan 1998 (part of NH line, all of FM line), Apr 1998 (parts of NH, all of FM, CR and COC lines), Nov 1998 (all), all cruises in 1999, and Feb 2000. See the data report for a description of outliers omitted from dataset.
|
micromolar |
TOC |
TN |
Total Nitrogen (micromolar). Fliers greater than 1sd from the mean replicate value were deleted from the dataset. Other TN data were deleted if values were abnormally high or low according to the depth profile or expected ranges.
|
micromolar |
no_bcodmo_term |
time_gmt |
Time in GMT format. Converted from original 'GMT Time' field, which was in HH:MM format.
|
HHMM, 24-hr clock |
time_gmt |
temp |
Water temperature as measured by CTD when Niskin bottles were fired (upcast).
|
degrees C |
temp |
station_std |
Standard station identifier; provides reference to other GLOBEC NEP cruise data. Originally named 'Station Name'.
|
dimensionless |
station_std |
station |
Station number.
|
dimensionless |
station |
sal |
Salinity as measured by CTD when Niskin bottles were fired (upcast).
|
unknown |
sal |
press |
Pressure (in dbar) as measured by CTD when Niskin bottles were fired (upcast). Proxy for depth.
|
decibars |
press |
PON |
Particulate organic Nitrogen (micromolar). See the data report for a description of outliers omitted from dataset.
|
micromolar |
PON_JG |
POC |
Particulate organic Carbon (micromolar). See the data report for a description of outliers omitted from dataset.
|
micromolar |
POC_JG |
month_gmt |
Month in GMT format. Converted from original 'GMT Date' field, which was in mm/dd/YYYY format.
|
dimensionless |
month_gmt |
lon |
Longitude, negative values = West. Originally named 'Long W'.
|
decimal degrees |
lon |
lat |
Latitude, positive values = North. Originally named 'Lat N'.
|
decimal degrees |
lat |
ISO_DateTime_UTC |
Date and time (UTC) formatted to ISO8601 standard. T indicates start of time string; Z indicates UTC.
|
YYYY-mm-ddTHH:MM:SS.ssZ |
ISO_DateTime_UTC |
DON |
Dissolved organic Nitrogen (micromolar). DON was determined by subtracting PON and DIN (NH4, NO3-, and NO2-) values from TN values. Individual data points were deleted if the coefficient of variation remained greater than 15% after removing data points greater than one sd from the mean. Various points were deleted if the sample value was determined to be below the detection limit. If PON data were missing, DON values were left in if they met the following criteria:
sample depth was > 50m and surrounding values were less than or equal to 10% of the DON values. Other DON data were deleted if values were abnormally high or low according to the depth profile or expected ranges.
|
micromolar |
DON |
DOC |
Dissolved organic Carbon (micromolar). DOC was determined by subtracting POC values from TOC
values. Individual data points were deleted if the coefficient of variation remained greater than 15% after removing data points greater than one sd from the mean. Various points were deleted if the sample value was determined to be below the detection limit. If POC data were missing, the corresponding DOC values were not calculated.
|
micromolar |
DOC |
day_gmt |
Day in GMT format. Converted from original 'GMT Date' field, which was in mm/dd/YYYY format.
|
dimesionless |
day_gmt |
cruise_id |
Alpha-numeric cruise ID number.
|
dimensionless |
cruise_id |