Metadata dictionary

Metadata describes the setup, instruments, and other parameters. Metadata may be provided for each component of the system.

General metadata

General metadata describes the setup, instruments, and other parameters.

Table 9‑4. All LI-COR devices may include the metadata variables.
Interface
variable		 Units Data file
variable		 Description
Start Time YYYYMMDD
HHMMSS		 TIMESTAMP_START Timestamp at the start of an observation
Total Volume cm3 VOLUME_TOTAL Total volume used in flux calculations
Pre-purge s PREPURGE Pre-purge length
Observation Length s OBSERVATION Observation length
Post Purge s POST_PURGE Post purge length
Horizontal   HORIZONTAL Numerical value of H from chamber's HVR field
Vertical   VERTICAL Numerical value of V from chamber's HVR field

LI-8250 and 8250-01 Extension Manifold metadata

Metadata includes information about the device.

Table 9‑5. Multiplexer and extension manifold metadata definitions. The DEVICE for these variables is LI-8250 or 8250-01 Extension Manifold.
Interface variable Data file variable Description
Serial Number SERIAL_NUMBER Device serial number
Firmware FIRMWARE Device firmware version
Port PORT Port number the observation was made on
Port Label PORT_LABEL User entered description associated with the port
Volume VOLUME Device volume
Latitude LATITUDE Multiplexer latitude in decimal degrees
Longitude LONGITUDE Multiplexer longitude in decimal degrees

8250-02 Calibration Manifold metadata

Metadata includes information about the device.

Table 9‑6. 8250-02 Calibration Manifold metadata definitions.
Interface variable Units Data file variable Description
Serial Number   SERIAL_NUMBER String indicating the serial number
Firmware   FIRMWARE String indicating the device firmware version number
Tube Length cm TUBE_LENGTH Length of tubing connecting the Calibration Manifold to the LI-8250. Contributes to the total system volume.
Volume cm3 VOLUME Volume of internal components.

Long-term Chamber metadata

Metadata includes information about the chamber operation and the soil collar. The 8200-104 and 8200-104C are long-term chambers.

Table 9‑7. LI-COR chamber metadata definitions. The DEVICE for these variables is CHAMBER.
Interface variable Units Data file variable Description
Serial Number   SERIAL_NUMBER Device serial number or chamber type
Firmware   FIRMWARE Device firmware version
Volume cm3 VOLUME Device volume
Tube Length cm TUBE_LENGTH Length of tubing associated with the chamber used to calculate total volume
Collar Height cm COLLAR_HEIGHT Collar height
Area cm2 AREA Soil area
Closing Time s CLOSE_TIME Time it took the chamber to close
Park Position ° PARK Chamber park position
Latitude ° LATITUDE Chamber latitude in decimal degrees
Longitude ° LONGITUDE Chamber longitude in decimal degrees

Smart Chamber device metadata

Two types of metadata are reported - one that describes the device, and another that describes properties of the measurements.

Table 9‑8. 8200-01S Smart Chamber Metadata definitions describe the chamber bowl on the Smart Chamber. The device for these variables will be CHAMBER.
Interface
variable		 Units Data file
variable		 Description
Serial Number   SERIAL_NUMBER Device serial number
Firmware   FIRMWARE Device firmware version
Volume cm3 VOLUME Device volume
Collar Height cm COLLAR_HEIGHT Collar height
Area cm2 AREA Soil area
Tube Length cm TUBE_LENGTH Volume of extension tubing
Park   PARK_POSITION Chamber park position
Latitude ° LATITUDE Chamber latitude in decimal degrees
Longitude ° LONGITUDE Chamber longitude in decimal degrees

Smart Chamber measurement metadata

Table 9‑9. 8200-01S Smart Chamber Metadata definitions describe the Smart Chamber. The device for these variables will be LI-8200.
Interface
variable		 Units Data file
variable		 Description
Serial Number   SERIAL_NUMBER Device serial number
Firmware   FIRMWARE Device firmware version
Label   LABEL Measurement label
Comment   COMMENT  
Rep   REP Replicate for repeated observations
Remark   REMARK Remark

LI-870 CO2/H2O Analyzer metadata

Metadata includes information about the device.

Table 9‑10. LI-870 metadata definitions. The DEVICE for these variables is LI-870.
Interface variable Units Data file variable Description
Volume cm3 VOLUME Device volume
Tube Length cm TUBE_LENGTH Length of tubing associated with the analyzer used to calculate total volume
Serial Number   SERIAL_NUMBER Device serial number
Firmware   FIRMWARE Device firmware version

LI-78xx Trace Gas Analyzer metadata

Metadata includes information about the device.

Table 9‑11. LI-78xx metadata definitions. The DEVICE for these variables is LI-7810, LI-7815, LI-7820, or LI-7825.
Interface variable Units Data file variable Description
Volume cm3 VOLUME Device volume
Tube Length cm TUBE_LENGTH Length of tubing associated with the analyzer used to calculate total volume
Serial Number   SERIAL_NUMBER Device serial number
Firmware   FIRMWARE Device firmware version

LI-7825 isotope metadata group definitions

Isotope metadata includes information about the computations.

Table 9‑12. Isotope metadata group includes variables that are provided with isotopologue measurements.
Interface variable Units Data file variable Description
Regression   REGRESSION Regression method: Keeling or Slope
Deadband s DEADBAND Deadband length (default is 0)
Stop Time s STOP_TIME Length of data used for the regression
Major Gas   MAJOR_GAS Name of the major gas species the regression was computed from (Keeling is CO2; Slope is 12CO2)
Major Gas Source   MAJOR_GAS_SOURCE Name of instrument representing the source of the major gas for the regression (defaults to LI-7825)
Minor Gas   MINOR_GAS Name of the minor gas species the regression was computed from (Keeling is DELTA_13C; Slope is 13CO2)
Minor Gas Source   MINOR_GAS_SOURCE Name of instrument representing the source of the minor gas for the regression (defaults to LI-7825)
Standard ‰ STANDARD Isotopic standard value (default is 0.0112372)

6800-09 Soil CO2 Flux Chamber (LI-6800) device metadata

Table 9‑13. LI-6800 Portable Photosynthesis System and 6800-09 Soil CO2 Flux Chamber Metadata definitions. The device for these variables will be LI-6800.
Interface
variable		 Units Data file
variable		 Description
Volume cm3 VOLUME Device volume
Serial Number   SERIAL_NUMBER Device serial number
Firmware   FIRMWARE Device firmware version
Label   LABEL Measurement label

6800-09 Soil CO2 Flux Chamber (LI-6800) measurement metadata

Table 9‑14. LI-6800 Portable Photosynthesis System and 6800-09 Soil CO2 Flux Chamber Metadata definitions. The device for these variables will be CHAMBER.
Interface
variable		 Units Data file
variable		 Description
Volume cm3 VOLUME Device volume
Serial Number   SERIAL_NUMBER Device serial number
Firmware   FIRMWARE Device firmware version
Collar Height cm COLLAR_HEIGHT Collar height
Area cm2 AREA Soil area
Tube Length cm TUBE_LENGTH Volume of extension tubing
Park   PARK_POSITION Chamber park position
Latitude ° LATITUDE Chamber latitude in decimal degrees
Longitude ° LONGITUDE Chamber longitude in decimal degrees

LI-8100A metadata

Table 9‑15. LI-8100A Automated Soil CO2 Flux System Metadata definitions. The device for these variables will be LI-8100.
Interface
variable		 Units Data file
variable		 Description
Volume cm3 VOLUME Device volume
Serial Number   SERIAL_NUMBER Device serial number
Firmware   FIRMWARE Device firmware version
Tube Length cm TUBE_LENGTH Volume of extension tubing
Comment   COMMENT  

LI-8150 metadata

Table 9‑16. LI-8150 Multiplexer Metadata definitions. The device for these variables will be LI-8150.
Interface
variable		 Units Data file
variable		 Description
Volume cm3 VOLUME Device volume
Port   PORT Port number the observation was made on
Latitude ° LATITUDE Multiplexer latitude in decimal degrees
Longitude ° LONGITUDE Multiplexer longitude in decimal degrees