DOIexperiment

Metadata for 'Climatologies at high resolution for the earth's land surface areas (Version 1.0)'
doi:10.1594/WDCC/CHELSA_v1

Name
Climatologies at high resolution for the earth's land surface areas (Version 1.0)
Acronym
CHELSA_v1
Project(s)
CHELSA (Climatologies at high resolution for the earth's land surface areas)
Summary
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.
Keyword(s)
global climatology, Precipitation, Temperature
Location(s)
World; Longitude: 0.0 to 360.0 Latitude: -90.0 to 90.0
Spatial Coverage
Longitude: -180.0 to 180.0 Latitude: -90.0 to 90.0
Temporal Coverage
1979-01-01 to 2013-12-31 (calendrical)
Size
90.4 GiB (97064723394 Bytes)
Format(s)
'GeoTIFF'
Progress
completely archived
Creation Date
2016-07-14
Future Review Date
2026-07-12
 
 
 

Citation
Karger, Dirk Nikolaus; Conrad, Olaf; Böhner, Jürgen; Kawohl, Tobias; Kreft, Holger; Soria-Auza, Rodrigo Wilber; Zimmermann, Niklaus E.; Linder, H. Peter; Kessler, Michael (2016). CHELSA climatologies at high resolution for the earth's land surface areas (Version 1.0). World Data Center for Climate (WDCC) at DKRZ. https://doi.org/10.1594/WDCC/CHELSA_v1
Accuracy report
For a detailed description of the methods see: (http://128.84.21.199/abs/1607.00217)
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 bias correction ( https://www.dwd.de/EN/ourservices/gpcc/gpcc.html ).
Resolution: High resolution (30 arcsec, ~1 km), monthly mean coverage 1979 - 2013
Structure: Incorporation of topoclimate (e.g. orographic rainfall & wind fields)
Global grids with the extent: West 180 E 180 W 90 N 90 S, Cell Size 0.008333, Number of Columns 43207, Number of Rows 21599. Geographic projection
Boundary condition and input data: Downscaled ERA-interim model and incorporation of topoclimate (e.g. orographic rainfall & wind fields)
Avoidance of spatial regression approaches and related problems
Allows calculation of derived parameters based on monthly values such as length of dry periods etc.
The grid extent contains rows larger than that of GMTED2010. This is due to cropping step during the algorithm which created 7 empty rows. This leads to the problem that the data cannot be read correctly into GrassGIS. The issue has be fixed in Version 1.1 (coming soon)
Monthly precipitation Version 1 has no GHCN bias correction (only GPCC). The monthly values therefore do not sum up to the annual values of Version 1.0. This issue has been fixed in Version 1.1 (coming soon).
SQA - Scientific Quality Assurance 'approved by author' 20/09/2016; TQA - Technical Quality Assurance 'approved by WDCC' 20/09/2016
Completeness report
Missing values are indicated with -99999 (ocean).
Areas between 179.284 E and 180 E as well -88.275 and -90 are missing in Version 1.0. This is due to a problem with the SAGA module which is used to transfer the ERA interim grids to a -180 to 180 extent. The algorithm could not wrap around the dateline, leading to missing values. The issue will be addressed in the forthcoming versions.
Specification
Technical Quality Assurance: The number of data sets is checked and not equal 0 [ done ]
Technical Quality Assurance: The size of every data set is not equal 0 [ done ]
Technical Quality Assurance: The data sets and corresponding metadata are all accessible via internet [ done ]
Technical Quality Assurance: The data size is checked and correct [ done ]
Technical Quality Assurance: The format is verified and correct [ done ]
Technical Quality Assurance: The time description is consistent[ done start and stop date checked ]
Technical Quality Assurance: The variable description and data are consistent [ done ]
Contact type Person Institute
contact_DOI_author Dr. Dirk Nikolaus Karger University of Zurich
metadata Dr. Dirk Nikolaus Karger University of Zurich
originator Dr. Dirk Nikolaus Karger University of Zurich
DOI_author Dr. Dirk Nikolaus Karger University of Zurich
DOI_author Olaf Conrad University of Hamburg
DOI_author Jürgen Böhner University of Hamburg
DOI_author Tobias Kawohl University of Hamburg
DOI_author Holger Kreft University of Göttingen
DOI_author Rodrigo Wilber Soria-Auza University of Göttingen
DOI_author Niklaus E. Zimmermann Swiss Federal Institute for Forest
DOI_author H. Peter Linder University of Zurich
DOI_author Michael Kessler University of Zurich
Reference type Title Published
IsPreviousVersionOf CHELSA climatologies at high resolution for the earth's land surface areas (Version 1.1) DOI 2016-10-11
IsDocumentedBy Climatologies at high resolution for the earth's land surface areas 2016-07-01
ProjectPub Climatologies at high resolution for the earth's land surface areas 2016-07-01
Citation-DOI CHELSA climatologies at high resolution for the earth's land surface areas (Version 1.0) DOI 2016-09-21
primURL_DOI/URN Climatologies at high resolution for the earth's land surface areas (Version 1.0) 2016-09-21