Getting Started



Terms of use

A document describing the rules regarding using the ISIMIP simulation data can be found here.


Input Data & Bias Correction

The ISIMIP framework includes bias-corrected climate-input data sets on a 0.5°x0.5°C global grid and at daily time steps. Additional socio-economic and human-influence data are also available, and detailed in the table below.

For ISIMIP2b, the bias-correction method has been updated and improved. See here for information on the ISIMIP2b bias correction; and here for information on the Fast-Track bias-correction method.

If published input data sets for any reason need to be replaced or updated, you will find details of these changes in the input data change log below.

Information about accessing ISIMIP input data.

Availability of ISIMIP2b input data.

Use the table's search box to limit input data sets to a chosen simulation round, data type, or to search for a specific data set.

Data set Protocol relation Data type Simulation round Description
Protocol
Observed atmospheric climate
Not yet active
EWEMBI global meteorological forcing data processed for ISIMIP2a.
Protocol
Observed atmospheric climate
Not yet active
ERA5 global meteorological forcing data processed for ISIMIP2a.
Protocol
Other
ISIMIP2b
ISIMIP2a
Fast Track
Extension of GRanD reservoirs & dams data. For some dams for which no construction/commissioning years were given in GRanDv1.1, they were added by PIK according to various sources (see column “SOURCE”). The dam location data previously to 2010 is based on GRanDv1.1 (Lehner et al., 2011, DOI: 10.1890/100125), but adjusted to match the river-routing network in DDM30. After 2010, the data has been provided by Dr. Jida Wang, from Kansas State University (KSU). Mapping algorithm developed by Andreas Dobler. Manual mapping done by M.Rocío Rivas, PIK.
Protocol
Observed atmospheric climate
Not yet active
ERA5 global meteorological forcing data processed for ISIMIP2a. Original ERA5 data were aggregated in space and time to 0.5° and temporal resolution, respectively. Prior to that aggregation, near-surface wind speed, relative and specific humidity were derived from available ERA5 variables: Near-surface wind speed was computed from near-surface easterly and northerly wind components. Near-surface relative and specific humidity were computed from surface air pressure, near-surface air temperature and near-surface dew point using the equations of Buck (1981, doi:10.1175/1520-0450(1981)020<1527:NEFCVP>2.0.CO;2) as described in Buck Research CR-1A User's Manual, Appendix 1 (www.hygrometers.com/wp-content/uploads/CR-1A-users-manual-2009-12.pdf).
Protocol
Simulated atmospheric climate
ISIMIP2b
Future (2006-2099) conditions provided based on CMIP5 output from MIROC5. The only difference between these data and those described at https://www.isimip.org/gettingstarted/details/21/ is the method used for bias adjustment and statistical downscaling.
Protocol
Simulated atmospheric climate
ISIMIP2b
Future (2006-2099) conditions provided based on CMIP5 output from HadGEM2-ES. The only difference between these data and those described at https://www.isimip.org/gettingstarted/details/52/ is the method used for bias adjustment and statistical downscaling.
Protocol
Simulated atmospheric climate
ISIMIP2b
Future (2006-2099) conditions provided based on CMIP5 output from IPSL-CM5A-LR. The only difference between these data and those described at https://www.isimip.org/gettingstarted/details/53/ is the method used for bias adjustment and statistical downscaling.
Protocol
Simulated atmospheric climate
ISIMIP2b
Future (2006-2099) conditions provided based on CMIP5 output from GFDL-ESM2M. The only difference between these data and those described at https://www.isimip.org/gettingstarted/details/51/ is the method used for bias adjustment and statistical downscaling.
Secondary
Other
Fast Track
Increased human and economic losses from river flooding with anthropogenic warming. The data set includes: - Static maps (land use, economic variables, population) used to compute impacts - For each model realization, the merged global maps of economic damage for the historical (hist) and future (rcp8p5) periods, as well as statistic tables of impacts aggregated per continent and per country - For each model realization, the merged global maps of population affected computed with current socioeconomic conditions and with SSP3 and SSP5 population projections, and the statistic tables of impacts aggregated per continent and per country - Tables of variables used as input in the impact assessment procedure - Tables describing aggregated impact results
Secondary
Socio-economic
ISIMIP2b
Annual global population data at 0.5° and 2.5' resolutions for the years 2006-2100 based on the population projections described in Jones & O’Neill (2016)
Secondary
Simulated atmospheric climate
ISIMIP2b
Future (2006-2099) conditions provided based on CMIP5 output from MIROC5. These data are analogous to the data described here: https://www.isimip.org/gettingstarted/details/21/ but for this RCP not included in the ISIMIP2b simulation protocol.
Secondary
Simulated atmospheric climate
ISIMIP2b
Future (2006-2099) conditions provided based on CMIP5 output from HadGEM2-ES. These data are analogous to the data described here: https://www.isimip.org/gettingstarted/details/52/ but for the this RCP not included in the ISIMIP2b simulation protocol.
Secondary
Simulated atmospheric climate
ISIMIP2b
Future (2006-2299) conditions provided based on CMIP5 output from IPSL-CM5A-LR. These data are analogous to the data described here: https://www.isimip.org/gettingstarted/details/53/ but for this RCP not included in the ISIMIP2b simulation protocol.
Secondary
Simulated atmospheric climate
ISIMIP2b
Future (2006-2099) conditions provided based on CMIP5 output from GFDL-ESM2M. These data are analogous to the data described here: https://www.isimip.org/gettingstarted/details/51/ but for this RCP not included in the ISIMIP2b simulation protocol.
Protocol
Land use
ISIMIP2b
Time-varying historical crop-land areas for 6 land-use types: rain-fed crop land, irrigated crop-land, rain-fed bioenergy, irrigated bio-energy, pastures, natural vegetation and urban areas. For more specific information, thd data are provided in 5 different resolutions of land-use types: landuse-totals: the land surface is broadly categorized into rainfed (cropland_rainfed) and irrigated cropland (cropland_irrigated), and into pastures (pastures) landuse-5crops: the distribution of the five predominant crop types (c3ann, c3per, c4ann, c4per and c3nfx), delineating both occurences of rainfed/irrigated crops and occurences of nutrition/bioenergy crops landuse-15crops: provides areas specific to either important species, e.g. wheat, or species groups, such as pulses landuse-pastures: pastures areas are split into managed pastures (managed_pastures) and rangeland (rangeland) landuse-urbanareas: provides the per-cell coverage of urban areas Data is available for the time period 2006-2099.
Protocol
Socio-economic
ISIMIP2b
Country-level population data for the years 1861-2009.
Protocol
Socio-economic
ISIMIP2b
Annual GDP data on a 0.5°x0.5° grid for 2006-2099.
Protocol
Socio-economic
ISIMIP2b
Annual country-level GDP data for the SSP2 scenario for 2006-2100 based on a linear temporal interpolation of the OECD data.
Protocol
Simulated atmospheric climate
ISIMIP2b
Pre-industrial (1661-1860), historical (1861-2005), future (RCP2.6 (2006-2100), RCP6.0 (2006-2099) and RCP8.5 (2006-2299)) and extended-future (RCP2.6, 2100-2299) conditions provided based on CMIP5 output from IPSL-CM5A-LR. Output includes the physical and biogeochemical ocean data required by the marine ecosystem sector of ISIMIP.
Protocol
Simulated atmospheric climate
ISIMIP2b
Pre-industrial (1661-1860), historical (1861-2005), future (RCP2.6 (2006-2100), RCP6.0 (2006-2099) and RCP8.5 (2006-2099) and extended-future (2100-2299) conditions provided based on CMIP5 output from HadGEM2-ES.
Protocol
Simulated atmospheric climate
ISIMIP2b
Pre-industrial (1661-1860), historical (1861-2005) and future (RCP2.6 (2006-2099), RCP6.0 (2006-2099) and RCP8.5 (2006-2099)) conditions provided based on CMIP5 output from GFDL-ESM2M. Output includes the physical and biogeochemical ocean data required by the marine ecosystem sector of ISIMIP.
Protocol
Other human influences
ISIMIP2b
ISIMIP2a
Catch data by country or EEZ or LME or globally.
Protocol
Land use
ISIMIP2a
Time-varying historical crop-land areas for 12 crop-functional types and pastures for rainfed and irrigated land use. Based on MIRCA 2000 and historical trends from HYDE 3.0.
Protocol
Other
ISIMIP2b
ISIMIP2a
Fast Track
Protocol
Other human influences
ISIMIP2b
Water abstraction for domestic and industrial uses consistent with SSP2. Histsoc (1901-2005); rcp26soc (2006-2099); rcp60soc (2006-2099)
Protocol
Simulated ocean climate
ISIMIP2b
Non bias-corrected 3D oceanic temperature fields on original GCM grid with monthly resolution from the GCMs: IPSL-CM5A-LR, GFDL-ESM2M, MIROC5, HadGEM2-ES.
Protocol
Simulated atmospheric climate
ISIMIP2b
Non bias-corrected 3D humidity and temperature fields on original GCM grid with monthly resolution from the GCMs: IPSL-CM5A-LR, GFDL-ESM2M, MIROC5, HadGEM2-ES.
Protocol
Emissions
ISIMIP2b
ISIMIP2a
Fast Track
Atmospheric CO2 concentration for 1661-2299. Values are constant for 1661-1860, following observations from 1861-2005, and correspond to rcp26 and rcp60 from 2006-2299.
Protocol
Simulated atmospheric climate
ISIMIP2b
Uncorrected daily wind components at 250hPa and 850hPa on original GCM grid for the GCMs: GFDL-ESM2M (1861-2100), MIROC5 (1850-2300), IPSL-CM5A-LR (1850-2300) & HadGEM-ES (1959-2299).
Protocol
Observed atmospheric climate
ISIMIP2b
ISIMIP2a
The EWEMBI dataset was compiled to support the bias correction of climate input data for ISIMIP2b and the ISIMIP2a protocol extension. For a full technical description, see "Data sources" below. Data is available for the time period 1979-2016.
Protocol
Socio-economic
ISIMIP2b
Annual country-level population, urban population and age structure (in five-year age bands) based on SSP2 from IIASA (population & age structure) and NCAR (urbanshare). Data is available for the following time periods: Annual country-level population (2006-2099), urban population (2006-2099), age structure (2010-2100).
Protocol
Socio-economic
ISIMIP2b
Annual global population data at 0.5° and 5' resolutions for the years 2006-2099 based on the national SSP2 population projections as described in Samir and Lutz, (2014).
Protocol
Simulated atmospheric climate
Fast Track
Daily-resolution, bias-corrected climate data from the global climate models MIROC-ESM-CHEM, NorES1-M, IPSL-CM5A-LR, GFDL-ESM2M, HadGEM2-ES covering the period 1950-2099 (historical run up to 2004, then split into 4 RCPs), downscaled to a 0.5°x0.5° lat-lon grid. For a full technical description, see the DOI link below (Hempel, et al., 2013a).
Protocol
Simulated ocean climate
ISIMIP2a
The ESM2M run is a fully coupled free running climate model forced by historical and future scenario GHGaerosol, solar boundary conditions without flux adjustment or other restoring to observations using TOPAZv2 as in Dunne et al 2013. DOI: 10.1175/JCLI-D-12-00150.1 Data is available for the following time periods: historical (1950-2005), rcp26 (2006-2100), rcp45 (2006-2100), rcp60 (2006-2100), rcp85 (2006-2100).
Protocol
Simulated ocean climate
ISIMIP2a
The COBALT run is as described in: http://www.sciencedirect.com/science/article/pii/S0079661113001079. It uses the same basic ocean-ice setup as Dunne et al., 2013 but is forced with reanalysis. Data is available for the following time period: historical (1959-2004).
Protocol
Other
ISIMIP2b
ISIMIP2a
Fast Track
** This data set has been expanded with missing construction/commissioning years, see https://www.isimip.org/gettingstarted/details/75/ ** The dam data is based on GRanDv1.1 (Lehner et al., 2011, DOI: 10.1890/100125), but adjusted to match the river-routing in DDM30. After 2010, the data has been provided by Dr. Jida Wang, from Kansas State University (KSU). Use of these data sets is recommended but, if unfeasible, groups may use their default dataset. For a comparison of this dataset with the default WaterGAP and LPJmL datasets, see https://www.arcgis.com/home/item.html?id=d966db9c7b2949ac8380458d7020adf9
Protocol
Observed atmospheric climate
ISIMIP2a
Daily-resolution observed climate data on a global (land and ocean) 0.5°x0.5° lat-lon grid from the Global Soil Wetness Project Phase 3 (GSWP3), based on the reanalysis data set 20CR and using the bias targets GPCC, GPCP, CPC-Unified, CRU and SRB. The data set covers the period 1901‐2010.
Protocol
Socio-economic
ISIMIP2b
ISIMIP2a
Annual country-level GDP data for 1850-2016.
Protocol
Land use
ISIMIP2b
Historical land-use (LU) changes from the HYDE3.2 data (Klein Goldewijk, 2016) (see Figure 3). Data for the time period 1861-2005.
Protocol
Land use
Fast Track
Harvested areas based on the MIRCA data set, covering irrigated and rainfed landuse.
Protocol
Socio-economic
ISIMIP2b
Annual global population data at 0.5° and 5' resolutions for the years 1861-2005 on a 0.5° and 5' grid.
Protocol
Observed atmospheric climate
ISIMIP2a
Daily-resolution observed climate data on a global (land and ocean) 0.5°x0.5° lat-lon grid. PGMFD v.2 (Princeton) is from he Terrestrial Hydrology Group at Princeton University, based on the reanalysis data set NCEP/NCAR Reanalysis I and using the bias targets CRU, SRB, TRMM, GPCP & WMO and validated against GSWP2. The PGMFD v.2 data set covers the period 1901‐2012. WATCH (WFD) Derived from the WATCH Project, based on the reanalysis data set ERA-40 and using the bias target GPCC. The data set covers the period 1901‐2001. WATCH+WFDEI Based on the reanalysis data set ERA-Interim and using the bias target GPCC. The data set covers the period 1901‐2012, where the data for 1901-1978 are taken from WFD, and from 1979 onwards from WFDEI.GPCC
Protocol
Simulated ocean climate
ISIMIP2a
Ocean data from the GCM IPSL-CM5A-LR. Data is available for the following time periods: historical (1950-2005), rcp26 (2006-2100), rcp45 (2006-2100), rcp60 (2006-2100), rcp85 (2006-2100).
Protocol
Simulated atmospheric climate
ISIMIP2b
Pre-industrial (1661-1860), historical (1861-2005), future (RCP2.6 (2006-2100), RCP6.0 (2006-2099) and RCP8.5(2006-2099)) and extended-future (2100-2299) conditions provided based on CMIP5 output from MIROC5. Output includes the physical and biogeochemical ocean data required by the marine ecosystem sector of ISIMIP.
Protocol
Other human influences
ISIMIP2b
ISIMIP2a
We provide the fertilization rate per our five canonical crop types, i.e. for both annual and perennial C3 and C4 crops, as well as for nitrogen fixing crops. The variables’ names are fertl_c3ann, fertl_c3per, fertl_c4ann, fertl_c4per and fert_c3nfx. The data are provided on an annual times step on the land surface of a global 0.5° × 0.5° grid. The units are kilograms per year and per hectare. Data is available for the following time periods: historical (1861-2005), rcp26soc+rcp60soc (2006-2099) (see below for detailed information).
Protocol
Other human influences
ISIMIP2b
ISIMIP2a
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°).
Protocol
Observed atmospheric climate
ISIMIP2a
Daily-resolution observed climate data on a global (land and ocean) 0.5°x0.5° lat-lon grid from the Terrestrial Hydrology Group at Princeton University, based on the reanalysis data set NCEP/NCAR Reanalysis I and using the bias targets CRU, SRB, TRMM, GPCP & WMO and validated against GSWP2. The data set covers the period 1901‐2012
Protocol
Socio-economic
Fast Track
Historical (1950-2009) and future projections (2010-2100) of country-level and gridded population data based on the Shared Socio-economic Pathways (SSPs) for SSP1-SSP5.
Protocol
Simulated atmospheric climate
ISIMIP2b
Uncorrected pressure and wind fields at 10m above the land surface with 3-hrly resolution for the GCMs IPSL-CM5A-LR (1861-2299), MIROC5 (1861-2099) and GFDL-ESM2M (1861-2099).
Protocol
Other
ISIMIP2b
ISIMIP2a
Fast Track
DDM30 River-routing network data.
Protocol
Other
ISIMIP2b
Total climate-driven regional sea level projections on a global 0.5x0.5° grid. Projection is a combination of ocean dynamic sea level fields and steric global contribution from the ISIMIP GCMs, and the fingerprints from glaciers and the Greenland and Antarctic ice sheets. Tthe time-dependent fingerpints were generated by scaling a time-independent fingerprint (see Bamber and Riva 2010) with the respective global timeseries for each contribution. Uncertainty for fingerprints is only from the global timeseries. Data is available for following time periods: historical (1861-2005), rcp26 (2006-2099; HadGEM2-ES and IPSL-CM5A-LR extended to 2299), rcp60 (2006-2099) (See below for detailed information).
Protocol
Observed atmospheric climate
ISIMIP2a
Daily resolution climate data on a global 0.5°x0.5° lat-lon grid: Derived from the WATCH Project, based on the reanalysis data set ERA-40 and using the bias target GPCC. The data set covers the period 1901‐2001. Related website: http://www.waterandclimatechange.eu/about/watch-forcing-data-20th-century When referring to the WATCH data set, the following paper should be cited: Weedon, G.P., S.S. Gomes, P.P. Viterbo, W.J. Shuttleworth, E.E. Blyth, H.H. Österle, J.C. Adam, N.N. Bellouin, O.O. Boucher, and M.M. Best, 2011: Creation of the WATCH Forcing Data and Its Use to Assess Global and Regional Reference Crop Evaporation over Land during the Twentieth Century. J. Hydrometeor., 12, 823–848, doi: 10.1175/2011JHM1369.1
Protocol
Observed atmospheric climate
ISIMIP2a
Daily-resolution observed climate data on a global (land only) 0.5°x0.5° lat-lon grid, based on the reanalysis data set ERA-Interim and using the bias target GPCC. The data set covers the period 1901‐2012, where the data for 1901-1978 are taken from WFD, and from 1979 onwards from WFDEI.GPCC

Input data changelog

May 16, 2019

The ERA5 observational climate dataset, made available on ESGF on May 9th, 2019 (Version: 20190502) has been retracted.This data set, running from 1979 to 2018, will be replaced by a combination of ERA5 and GSWP3 covering from 1901 to 2018.

May 6, 2019

3 newly available national GDP data sources are used to extend existing national GDP ISIMIP data from 2009 onwards based on matching country-specific national real GDP (PPP 2005 USD) for the year 2009.In consecutive order we use the Maddison Project Database version 2018 (variable: 'rgdpnapc' and 'pop', unit: 2011 PPP USD), t ...

April 25, 2019

Extended previous dam data "GRanD reservoirs & dams". Now replaced by "Reservoirs and dams".For some dams for which no construction/commissioning years were given in GRanDv1.1 (data file GRanDv1.1_adjusted.txt), they were added by PIK according to various sources.

Feb. 21, 2019

The years 2006 to 2009 were missing in rcp26soc/gdp_rcp26soc_countrylevel_annual_2006-2099.csv. They have been added now.


How to find and transfer ISIMIP data

For ISIMIP participants

Access to the ISIMIP input and output data for ISIMIP participants (i.e. modelling groups contributing simulations according to the ISIMIP protocol) is through the DKRZ server in Hamburg Germany. Information about applying for a DKRZ account and accessing these data can be found on the Modellers' Dashboard.

For external users

Access to the ISIMIP input and output data for external users (i.e. non participants), is provided via a node of the Earth System Grid Federation (ESGF). Information about accessing these data can be found here. External users of ISIMIP output data should pay special attention to the ISIMIP terms of use.