Accessing ISRaD Data
- Using R, the compiled database or individual ISRaD datasets can be downloaded (in .xlsx, .csv, and .rda format) and easily loaded into an R session following this tutorial. For more information see the R package page of this website.
- For non-R users, ISRaD data is available in .xlsx and .csv formats. Download here (contents of the zip archive are described in detail in the Data Files section below).
Raw versus "Extra" data
There are two different versions of the compiled database:
- Raw data files (with names beginning in "ISRaD_data") contain only data ingested from the original source datasets.
- Expanded or "extra" data files (with names begnining in "ISRaD_extra") include the original raw data as well as additional variables that have either been calculated from existing data or imported based on geospatial coordinates, such as geospatially referenced land cover, climate, and soil data.
The following files are included in the ISRaD_database_files.zip archive
- ISRaD_data_vX.date.xlsx - Full hierarchical database compiled in a single .xlsx workbook
- ISRaD_data_vX.date.rda - Same but in (binary) R data format
- ISRaD_data_flat_layer_vX.date.csv - Layer data and associated information (Layer, Profile, Site, Metadata)
- ISRaD_data_flat_flux_vX.date.csv - Flux data and associated information (Flux, Profile, Site, Metadata)
- ISRaD_data_flat_interstitial_vX.date.csv - Interstitial data and associated information (Interstitial, Profile, Site, Metadata)
- ISRaD_data_flat_fraction_vX.date.csv - Fraction data and associated information (Fraction, Layer, Profile, Site, Metadata)
- ISRaD_data_flat_incubation_vX.date.csv - Incubation data and associated information (Incubation, Layer, Profile, Site, Metadata)
Hierarchical "ISRaD_extra" data:
- ISRaD_extra_vX.date.xlsx - Same as ISRaD_data_vX.date.xlsx, but with additional calculated/filled data fields
- ISRaD_extra_vX.date.rda - Same but in (binary) R data format
Flattened "ISRaD_extra" data:
- ISRaD_extra_flat_layer_vX.date.csv - Layer data and associated information (Layer, Profile, Site, Metadata)
- ISRaD_extra_flat_flux_vX.date.csv - Flux data and associated information (Flux, Profile, Site, Metadata)
- ISRaD_extra_flat_interstitial_vX.date.csv - Interstitial data and associated information (Interstitial, Profile, Site, Metadata)
- ISRaD_extra_flat_fraction_vX.date.csv - Fraction data and associated information (Fraction, Layer, Profile, Site, Metadata)
- ISRaD_extra_flat_incubation_vX.date.csv - Incubation data and associated information (Incubation, Layer, Profile, Site, Metadata)
- readme.txt - Metadata and information about zip archive contents.
The names of the data files reflect the version of ISRaD used and the date on which the database was compiled. Names are constructed in the format (data name)_(vX).(date).(format), where data name tells what data this is (ie. ISRaD_extra_flat_layer), vX refers to the official ISRaD version number (e.g. "v1.2.3"), date gives the date when the data were compiled (yyyy-mm-dd), and format is the file type.
The ISRaD database is compiled from individual template files, each of which describes a single data set (i.e. linked to a DOI).
In ISRaD we strive to incorporate radicoarbon data collected at many different spatial and temporal scales: from laboratory fractionations to gaseous fluxes and dissolved organics observed in the field. The ISRaD database is structured accordingly as a list of hierarchically-linked tables designed for recording these different kinds of data.
ISRaD data tables (in descending hierarchical order):
- General information
- Metadata identify the source of the data (DOI, citation)
- Site data provide location information (spatial coordinates)
- Profiles are places sampled within the general area of the site (e.g. soil profiles, flux chambers, etc.). Finer scale spatial coordinates should be reported if available. Report general data on vegetation, soil taxonomy, and local climate (mean annual temperature and precipitation) at the profile level.
- Data associated with an individual Profile
- Flux and Interstitial measurements, e.g. CO2, methane, dissolved organic matter, etc.
- Layer %C, %N, bulk density, etc. data from individual depth layers of a soil profile.
- Data associated with a specific layer are reported in the following tables:
- Fractions of soil as defined by physical, chemical, or biological methods
- Amount and isotoptic signature of CO2 or methane produced during laboratory Incubations
Detailed database structure:
An overview of variables included in ISRaD can be found here.
Current ISRaD Data
List of datasets in ISRaD (development version):
- Complete list here
In progress datasets:
- Visit this google doc to see the status of different datasets
Photo credit to Dr. Asmeret Berhe.