Variables (click to expand):
DATASET_CODE
- Label: Dataset code
- Definition: DATASET_CODE
- Type: Nominal
- Missing values: None specified
STREAM
- Label: Stream
- Definition: Stream name in the Lake Fryxell Basin, Taylor Valley, Antarctica.
- Type: Nominal
- Missing values: None specified
DATE_SAMPLED
- Label: Date sampled
- Definition: Date samples were collected.
- Type: Date/time
- Date format: MM/DD/YYYY
- Missing values: None specified
TIME_SAMPLED
- Label: Time sampled
- Definition: Time a sample was taken (for POM only). Expressed in NZST (daylight savings time is observed).
- Type: Date/time
- Date format: HHMM
- Missing values:
TRANSECT
- Label: Transect
- Definition: The established MCM LTER transect that samples were taken from.
- Type: Nominal
- Missing values: None specified
SAMPLE_TYPE
- Label: Sample type
- Definition: Type of sample. Includes the three mat types (i.e., black, green, orange) as well as POM (particulate organic matter).
- Type: Nominal
- Missing values: None specified
DISTANCE
- Label: Distance
- Definition: Distance of a given transect from the Von Guerard Glacier as estimated using Google Earth.
- Type: Physical quantity
- Unit: kilometer
- Maximum: Not specified
- Minimum: Not specified
- Precision: Not specified
- Missing values: None specified
D13C
- Label: d13C
- Definition: Measure of the ratio of 13C:12C in standard delta notation, expressed relative to universal isotope standards (Pee Dee Belemnite) in parts per thousand (per mil).
- Type: Physical quantity
- Unit: perMil
- Maximum: Not specified
- Minimum: Not specified
- Precision: Not specified
- Missing values:
D15N
- Label: d15N
- Definition: Measure of the ratio of 15N:14N in standard delta notation, expressed relative to universal isotope standards (atmospheric N2) in parts per thousand (per mil).
- Type: Physical quantity
- Unit: perMil
- Maximum: Not specified
- Minimum: Not specified
- Precision: Not specified
- Missing values:
CN
- Label: C:N
- Definition: Molar ratio of carbon (C) to nitrogen (N). Blank cells indicate missing values.
- Type: Nominal
- Missing values: None specified
CP
- Label: C:P
- Definition: Molar ratio of carbon (C) to phosphorus (P). Blank cells indicate missing values.
- Type: Nominal
- Missing values: None specified
NP
- Label: N:P
- Definition: Molar ratio of nitrogen (N) to phosphorus (P). Blank cells indicate missing values.
- Type: Nominal
- Missing values: None specified
AFDM
- Label: Ash-free dry mass
- Definition: The mass of the mat sample lost following ignition per unit area.
- Type: Physical quantity
- Unit: milligramsPerCentimeterSquared
- Maximum: Not specified
- Minimum: Not specified
- Precision: Not specified
- Missing values:
CHLA
- Label: Chlorophyll-a
- Definition: Quantity of measured chlorophyll-a pigment per unit area.
- Type: Physical quantity
- Unit: microgramsPerCentimeterSquared
- Maximum: Not specified
- Minimum: Not specified
- Precision: Not specified
- Missing values:
AI
- Label: Autotrophic index
- Definition: The ratio of chlorophyll-a to ash-free dry mass. Blank cells indicate missing values.
- Type: Nominal
- Missing values: None specified
Source URL: https://mcm.lternet.edu/content/streamisotopesrcvg