Biological, Ancillary, Disturbance, and Metadata (BADM) are non-continuous information that describe and compliment flux-met data. The BADM Data Product uses BADM Standards that describe variables, units, and requirements. The BADM Standards are co-developed and used by AmeriFlux, ICOS, Fluxnet and other networks.
When downloading data from AmeriFlux, each download may include a BADM (BIF) file for the site. The BADM file provides a description, general background, geo-location, relevant publications and references for the site. The BADM files also list what is measured at the site (this list may include chamber, gradient or other eddy covariance measurements that are a superset of the data available in AmeriFlux). Additional BADM variables such as LAI, biomass measurements and soil characteristics will be added to the BADM files over time.
Descriptions of variables and units in the BADM files are available at https://ameriflux.lbl.gov/data/badm/. Vocabulary permitted for LIST (XXX) variables can be found on the second sheet of the workbook and longer explanations of variables can be found on the third sheet. At present only the variables of Site_General_Info and Disturbance_and_Management are made available.
The naming convention and format we have adopted for AmeriFlux BADM-SGI files are as follows:
|AMF||This represents the publishing network, in this case, AmeriFlux.|
For site-specific information, the Site ID will be that of a specific site. We use a site ID of AA-xxx to identify files containing data from multiple sets. The two site IDs in use are:
AA-Flx: Data in this file is aggregated across all sites with flux data.
AA-Net: Data in this file is aggregated across all sites in the network.
|BIF||Indicates that the information is listed in BIF (short for BADM Interchange Format) format that enables the BADM data to be read programmatically. The BIF format consists of 5 columns: site ID, group ID, variable group name, variable name, and data value. A variable group is a set of variables that are reported together (e.g. a variable value, the date it was collected, and the method used to collect it). Sites may report multiple instances of the same variable group associated with different measurements collected over time, plant species, soil depths, collection methods, etc. The group ID uniquely identifies the data belonging to the same instance of a reported variable group. The variable names and data value provide the details of the reported data within a variable group.|
|YYYYMMDD||Indicates the date on which the BADM information was made available. If the BADM is part of a zip file, any changes to the BADM file do not increment the version of the zip file.|