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.

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.

The HTXO98 TTAAii Data Designators decode as: T1 (H): Grid point information (GRIB) T1T2 (HT): Temperature A1 (X): Global Area (area not definable) A2 (O): 120 hours forecast (5 days) T1ii (H98): Air priorities for the Earth's surface (Remarks from Volume-C: H+ 120 (GLOBAL MODEL) TEMPERATURE 2 METRES)

The HTXA88 TTAAii Data Designators decode as: T1 (H): Grid point information (GRIB) T1T2 (HT): Temperature A1 (X): Global Area (area not definable) A2 (A): Analysis (00 hour) T1ii (H88): Ground or water properties for the Earth's surface (ie snow cover, wave and swell) (Remarks from Volume-C: H+ 00 (GLOBAL MODEL) GROUND OR WATER PROPERTIES)

The HTXG70 TTAAii Data Designators decode as: T1 (H): Grid point information (GRIB) T1T2 (HT): Temperature A1 (X): Global Area (area not definable) A2 (G): 36 hours forecast T1ii (H70): 700 hPa (Remarks from Volume-C: H+ 36 (GLOBAL MODEL) TEMERATURE 700 HPA)

The HTXH98 TTAAii Data Designators decode as: T1 (H): Grid point information (GRIB) T1T2 (HT): Temperature A1 (X): Global Area (area not definable) A2 (H): 42 hours forecast T1ii (H98): Air priorities for the Earth's surface (Remarks from Volume-C: H+ 42 (GLOBAL MODEL) TEMPERATURE 2 METRES)

The HTXX20 TTAAii Data Designators decode as: T1 (H): Grid point information (GRIB) T1T2 (HT): Temperature A1 (X): Global Area (area not definable) A2 (X): Not assigned T1ii (H20): 200 hPa (Remarks from Volume-C: H+ 66 (GLOBAL MODEL) TEMPERATURE 200 HPA)

The HTXQ10 TTAAii Data Designators decode as: T1 (H): Grid point information (GRIB) T1T2 (HT): Temperature A1 (X): Global Area (area not definable) A2 (Q): 144 hours forecast T1ii (H10): 100 hPa (Remarks from Volume-C: H+ 144 (GLOBAL MODEL) TEMPERATURE 100 HPA)

The HTXX98 TTAAii Data Designators decode as: T1 (H): Grid point information (GRIB) T1T2 (HT): Temperature A1 (X): Global Area (area not definable) A2 (X): Not assigned T1ii (H98): Air priorities for the Earth's surface (Remarks from Volume-C: H+ 66 (GLOBAL MODEL) TEMPERATURE 2 METRES)