Dataset name: 
Harmonized World Soil Database (HWSD) v1.2

Variable names: 
SOC (Soil Organic Carbon)

Reference of original data:
Panagos P., Van Liedekerke M., Jones A., Montanarella L. European Soil Data Centre: 
        Response to European policy support and public data requirements. 
        Land Use Policy, 29 (2), pp. 329-338, doi:10.1016/j.landusepol.2011.07.003, 
        ISSN: 02648377, 2012.

As modified by Todd-Brown et al. (2013), here is the reference:
Todd-Brown, T.E.O, J.T. Randerson, W. M. Post, F.M. Hoffman, C. Tarnocai, E.A.G. Schuur, and S.D. Allison, 
        Causes of variation in soil carbon simulations from CMIP5 Earth system models and comparison with 
        observations. Biogeosciences, 10, 1717-1736, 2013.

Downloaded site:
Todd-Brown's personal communication

Downloaded Date:
Mar. 5, 2014

Downloaded by:
Mingquan Mu 
Earth System Science, University of California, Irvine

Name and version of original source: 
HWSD

Start date:
annual

End date:
annual

Temporal resolution: 
yearly

Spatial resolution: 
0.5x0.5 degree

Unit: 
Kg C /m2

Data format: 
netCDF