CHELSA_v1.1 (http://chelsa-climate.org/) is a high resolution (30 arc sec, ~1 km) climate data set for the earth land surface areas. It includes monthly and annual mean temperature and precipitation patterns as well as derived bioclimatic and interannual parameters for the time period 1979-2013. CHELSA_v1.1 is based on a quasi-mechanistical statistical downscaling of the ERA interim global circulation model (http://www.ecmwf.int/en/research/climate-reanalysis/era-interim) with a GPCC (https://www.dwd.de/EN/ourservices/gpcc/gpcc.html) and GHCN (https://www.ncdc.noaa.gov/ghcnm/) bias correction.

CHELSA_v1.0 (http://chelsa-climate.org/) is a high resolution (30 arc sec, ~1 km) climate data set for the earth land surface areas. Version 1.0 is a first release. It includes monthly and annual mean temperature and precipitation patterns for the time period 1979-2013. CHELSA_v1 is based on a quasi-mechanistical statistical downscaling of the ERA interim global circulation model (http://www.ecmwf.int/en/research/climate-reanalysis/era-interim) with a GPCC (https://www.dwd.de/EN/ourservices/gpcc/gpcc.html) and GHCN (https://www.ncdc.noaa.gov/ghcnm/) bias correction. Specifications: High resolution (30 arcsec, ~1 km) Precipitation & Temperature Monthly coverage 1979 - 2013 Incorporation of topoclimate (e.g. orographic rainfall & wind fields). Downscaled ERA-interim model. Allows calculation of derived parameters based on monthly values such as length of dry periods etc.

The HEXP98 TTAAii Data Designators decode as: T1 (H): Grid point information (GRIB) T1T2 (HE): Precipitation A1 (X): Global Area (area not definable) A2 (P): 132 hours forecast T1ii (H98): Air priorities for the Earth's surface (Remarks from Volume-C: H+ 132 (GLOBAL MODEL) ACCUMULATED PRECIPITATION)

The HEXE98 TTAAii Data Designators decode as: T1 (H): Grid point information (GRIB) T1T2 (HE): Precipitation A1 (X): Global Area (area not definable) A2 (E): 24 hours forecast T1ii (H98): Air priorities for the Earth's surface (Remarks from Volume-C: H+ 24 (GLOBAL MODEL) ACCUMULATED PRECIPITATION)

The HEXA98 TTAAii Data Designators decode as: T1 (H): Grid point information (GRIB) T1T2 (HE): Precipitation A1 (X): Global Area (area not definable) A2 (A): Analysis (00 hour) T1ii (H98): Air priorities for the Earth's surface (Remarks from Volume-C: H+ 00 (GLOBAL MODEL) ACCUMULATED PRECIPITATION)

The HEXW98 TTAAii Data Designators decode as: T1 (H): Grid point information (GRIB) T1T2 (HE): Precipitation A1 (X): Global Area (area not definable) A2 (W): Not assigned T1ii (H98): Air priorities for the Earth's surface (Remarks from Volume-C: H+ 54 (GLOBAL MODEL) ACCUMULATED PRECIPITATION)

The HEXD98 TTAAii Data Designators decode as: T1 (H): Grid point information (GRIB) T1T2 (HE): Precipitation A1 (X): Global Area (area not definable) A2 (D): 18 hours forecast T1ii (H98): Air priorities for the Earth's surface (Remarks from Volume-C: H+ 18 (GLOBAL MODEL) ACCUMULATED PRECIPITATION)

The HEXR98 TTAAii Data Designators decode as: T1 (H): Grid point information (GRIB) T1T2 (HE): Precipitation A1 (X): Global Area (area not definable) A2 (R): 156 hours forecast (7 days) T1ii (H98): Air priorities for the Earth's surface (Remarks from Volume-C: H+ 156 (GLOBAL MODEL) ACCUMULATED PRECIPITATION)

The HEXC98 TTAAii Data Designators decode as: T1 (H): Grid point information (GRIB) T1T2 (HE): Precipitation A1 (X): Global Area (area not definable) A2 (C): 12 hours forecast T1ii (H98): Air priorities for the Earth's surface (Remarks from Volume-C: H+ 12 (GLOBAL MODEL) ACCUMULATED PRECIPITATION)

The HEXK98 TTAAii Data Designators decode as: T1 (H): Grid point information (GRIB) T1T2 (HE): Precipitation A1 (X): Global Area (area not definable) A2 (K): 72 hours forecast T1ii (H98): Air priorities for the Earth's surface (Remarks from Volume-C: H+ 72 (GLOBAL MODEL) ACCUMULATED PRECIPITATION)