LIMNO_ALPS_POC_PON
Description:
Details about the entity containing (spreadsheet) the ALPS POC_PON data, such as parameter names, units, definitions and other details.
File:
Methods:
Lake water samples were collected at 15m in both lobes of Lake Bonney with the McLane Remote Access Sampler (RAS) 48 times approximately every nine days from December 2013 to December 2014. Each sample was pumped into a 500 ml sample bag, to whichwe added 5 mL of saturated mercuric chloride (10g 100 ml-1 or 1 mg ml-1 final concentration) before deployment. After redeployment of the RAS, sample bags were stored in 1000 ml Nalgene bottles and shipped to the US for analysis.Water for analysis (ELB sample volumes ranged from 190-497 ml; WLB samples volumes ranged from 406-477 ml; sample volumes varied because the instrument did not always collect the full 500 ml) was filtered through a combusted Whatman 25 mm GF/F filter (475 degrees C for 4 hours). Each filter was placed onto an aluminum weighing pan and air dried. Once the filters were dry, they were acidified by fuming with HCL, and analyzed using a CE Elantech Flash EA 1112 Elemental Analyzer. Total particulate organic carbon (POC) and particulate organic nitrogen (PON) was obtained by comparison with an acetanilide standard curve.
Variables (click to expand):
DATASET_CODE
- Label:
- Definition: Code to designate the table name
- Type: Nominal
- Missing values: None specified
Location Name
- Label:
- Definition: Name of lake where measurement was made
- Type: Nominal
- Missing values: None specified
Location Code
- Label:
- Definition: Code for site where measurement was made
- Type: Nominal
- Missing values: None specified
DATE_TIME
- Label:
- Definition: Date on which sample was gathered
- Type: Date/time
- Date format: MM/DD/YYYY
- Missing values: None specified
Depth (m)
- Label:
- Definition: Distance below the piezometric water level from which sample was drawn.
- Type: Physical quantity
- Unit: meter
- Maximum: Not specified
- Minimum: Not specified
- Precision: Not specified
- Missing values: None specified
VOLUME_FILTERED
- Label:
- Definition: How much sample was actually filtered
- Type: Nominal
- Missing values: None specified
POC (ug/L)
- Label: POC (microg L-1)
- Definition: Particulate organic carbon concentration found at lake depth
- Type: Physical quantity
- Unit: ug/L
- Maximum: 3000
- Minimum: 0
- Precision: 0.1
- Missing values:
- Null = None given
POC (microM)
- Label:
- Definition: Particulate organic carbon concentration found at lake depth
- Type: Physical quantity
- Unit: microM
- Maximum: 200
- Minimum: 0
- Precision: 0.1
- Missing values:
- Null = None given
PON (ug/L)
- Label: PON (microg L-1)
- Definition: Particulate organic nitrogen concentration found at lake depth
- Type: Physical quantity
- Unit: metersPerSecondSquared
- Maximum: Not specified
- Minimum: Not specified
- Precision: Not specified
- Missing values:
- Null = None given
PON (microM)
- Label:
- Definition: Particulate organic nitrogen concentration found at lake depth
- Type: Physical quantity
- Unit: microM
- Maximum: Not specified
- Minimum: Not specified
- Precision: Not specified
- Missing values:
- Null = None given
C:N
- Label:
- Definition: Carbon to Nitrogen Ratio
- Type: Physical quantity
- Unit: metersPerSecondSquared
- Maximum: Not specified
- Minimum: Not specified
- Precision: Not specified
- Missing values:
- Null = None given
Sample Comments
- Label:
- Definition: Helpful hints about the overall sample
- Type: Nominal
- Missing values: None specified
File Name
- Label:
- Definition: Name of file in which data was submitted
- Type: Nominal
- Missing values: None specified