ISIMIP2a: Monthly, 0.5° gridded data for 1860-2016
ISIMIP2b: Annual and monthly, 0.5° gridded data for 1850-2099 derived from the average of three atmospheric chemistry models (i.e., GISS-E2-R, CCSM-CAM3.5, and GFDL-AM3) in the Atmospheric Chemistry and Climate Model Intercomparison Project (ACCMIP) (0.5° x 0.5°).
ISIMIP2a: Gridded NHx and NOy deposition simulated by NCAR Chemistry-Climate Model Initiative (CCMI) during 1860-2014 at monthly time step. Nitrogen deposition data was interpolated to 0.5° by 0.5° by the nearest grid. Data in 2015 and 2016 are taken from 2014 as it is assumed to be same.
ISIMIP2b: GISS-E2-R provided monthly data; CCSM-CAM3.5 provided monthly data in each decade from 1850s to the 2000s; and GFDL-AM3 provided monthly data for 1850-1860, 1871-1950, 1961-1980, 1991-2000 and 2001-2010. Annual deposition rates calculated by aggregating the monthly data, and deposition rates in years without model output were calculated according to spline interpolation (CCSM-CAM3.5) or linear interpolation (for GFDL). The original deposition data was downscaled to spatial resolution of half degree (90° N to 90° S, 180° W to 180° E) by applying the nearest interpolation.
For ISIMIP participants, these files are available for download on the DKRZ server using the path
For external users, these data is made available on the ISIMIP ESGF server (https://esg.pik-potsdam.de/projects/isimip/). They are also available via an rsync facility (described here: https://www.isimip.org/gettingstarted/data-access/#for-external-non-participant-users), for which the password will be provided upon request (firstname.lastname@example.org).