Measurement Height contains height/depth and instrument model information for AmeriFlux BASE data products.* This information is updated approximately once a month, in conjunction with new BASE releases.
Measurement Height is a temporary data product being offered while the AmeriFlux BADM infrastructure is upgraded. The downloaded csv file contains information provided directly by site teams, or from historical records. Site teams can update their Measurement Height information using the Variable Information tool.
Safari users: To download the file, control-click / right click the Download button, choose “Download Linked File As” or “Save Link As”, and specify a destination.
Measurement Height contains the following information:
| Item | Description |
|---|---|
| Site_ID | Site identifier. |
| Variable | Variable name of the data included in the BASE file. |
| Start_Date | Date when the information first applies. No value means the information begins at the start of the site’s full data record. |
| Height | Distance from the ground surface in meters. Positive values are heights, and negative values are depths. |
| Instrument_Model | Instrument model used to collect the data variable. These values are from the predefined BADM Instrument list for instrument model types. See LIST(Vocabulary) tab in the BADM Instrument Template for explanations. |
| Instrument_Model2 | A second instrument model used to collect the data variable. This information is only available for flux variables that are calculated from a gas analyzer and sonic anemometer. These values are from the predefined BADM Instrument list for instrument model types. See LIST (Vocabulary) tab in the BADM Instrument Template for explanations. |
| Comment | Additional information provided by the site team or parsed from historical information. |
| BASE_Version | The most recent AmeriFlux BASE data product* version number for which the information applies. |
* The AmeriFlux BASE data product is AmeriFlux’s standardized and QA/QC’ed half-hourly / hourly flux-met data product. Download AmeriFlux BASE data on the Download Data page.