Global Charcoal Database

Contains the Global Charcoal database data. Data include charcoal series (age, depth, charcoal quantity, associated units and methods) and information on sedimentary sites (localisation, depositional environment, biome, etc.) as well as publications informations. Since 4.0.0 the GCD mirrors the online SQL database at <>.


GCD 4.0.4 (23/11/18)

  • 0 "QUANTITY" charcoal values are interpreted as NULL in the SQL database and were dropped in previous GCD package versions PLEASE UPDATE

  • 3 sites added

GCD 4.0.3 (20/08/18)

  • Prefunit is defined as the unit with more data for sites without influx (otherwise influx unit is always the prefunit)

  • 9 sites added and 1114 charcoal values

GCD 4.0.2 (24/04/18)

  • Three new fields in paleofiresites table to enable backward compatibility and listing GCD version numbers "GCD_version" "num_version" and data publication date "update_date", see ?paleofiresites for details.

  • num_dating variable issues corrected

  • minor bug fixes

GCD 4.0.1 (26/03/18)

  • 7 sites have been added and associated 3500 char values

  • Depths have been corrected to be exact at the third decimal for several sites

GCD 4.0.0 (01/03/18)

  • GCD database now mirrors the online SQL database

  • Future updates will be monthly or whenerver database updates

  • Paleofiresites table has been reduced and adapted to SQL data (see pfSiteSel changes in paleofire package)

  • charcoal_units table added

GCD 3.0.5 (22/04/15)

  • Removed potveg function (now part of paleofire package)

  • Documentation moved to roxygen

GCD 3.0.4 (22/05/14)

New features:

  • Added publications and citation data for paleofire::pfPublication function

GCD 3.0.3 (30/04/14)

  • The rf99 and l12 fields have been updated using the potveg function and kernel density estimation of the dominant potential vegetation in a radius of 30 km around sites

  • "0: Water" level has been added to potential vegetations

  • Bug fix in potveg function related to projections not considered as longlat by default for the extract function (raster package).

GCD 3.0.2 (08/04/14)

  • Bug fix that caused potveg to fail (related to old variable naming scheme)

GCD 3.0.1

New features:

  • Added UNIT METHOD and TYPE in paleofiredata to work in conjunction with pfTransform (paleofire package 1.1)

  • Added potveg to retrieve the potential vegetation associated with charcoal sites (and plot capabilities)

  • paleofiresites has been updated to work in conjunction with pfSiteSel (paleofire package 1.1)


  • All data from the GCD is now included (multiple units may exist for single sites)

  • Three decimal unit precision for all charcoal values

GCD 3.0

  • Initial release of the package

Reference manual

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4.0.7 by Olivier Blarquez, a year ago

Browse source code at

Authors: Global Paleofire Working Group <[email protected]>

Documentation:   PDF Manual  

GPL (>= 2) license

Imports raster

Suggests paleofire

Depended on by paleofire.

See at CRAN