...
| Expand | ||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ||||||||||||||||||||||||||||||||
|
Related documents
| Reference ID | Document | ||||||
|---|---|---|---|---|---|---|---|
D1
| NGCD Algorithm Theoretical Basis Document | ||||||
D2
| Climate and Forecast (CF) Conventions and Metadata; http://cfconventions.org | ||||||
D3
| R Core Team (2017). R: A language and environment for statistical computing. R Foundation for Statistical Computing, Vienna, Austria. URL https://www.R-project.org/ |
Acronyms
Acronym | Definition |
CDS | |
MET Norway | |
FMI | |
KNMI | |
SMHI | |
NGCD | Nordic Gridded Climate Dataset (DOI:https://doi.org/10.24381/cds.e8f4a10c |
NGCD-1 | NGCD type 1 datasets |
NGCD-2 | NGCD type 2 datasets |
seNorge | Observational gridded dataset over Norway (senorge.no) |
ECA&D | |
TITAN | |
OI | Optimal Interpolation |
| RMSE | Root Mean Squared Error |
Main variables
Symbol | Definition |
TG | Daily mean temperature (from day before the date in the timestamp at 06 UTC, to date in the timestamp at 06 UTC) |
TX | Daily maximum temperature (from day before the date in the timestamp at 18 UTC, to date in the timestamp at 18 UTC) |
TN | Daily minimum temperature (from day before the date in the timestamp at 18 UTC, to date in the timestamp at 18 UTC) |
RR | Daily precipitation total (from day before the date in the timestamp at 06 UTC, to date in the timestamp at 06 UTC) |
Data access information
Anchor table_data_access table_data_access
| Description | Link |
|---|---|
The historical archive for different versions is made available to users via the CDS | https://cds.climate.copernicus.eu/datasets/insitu-gridded-observations-nordic |
| The data are also available to users via MET Norway OPeNDAP access | https://thredds.met.no/thredds/catalog/ngcd/catalog.html |
| MET Norway. Historical archive ver. 25.03 (for different versions, replace 25.03 with the correct label) | https://thredds.met.no/thredds/catalog/ngcd/version_25.03/catalog.html |
| MET Norway. Provisional archive | https://thredds.met.no/thredds/catalog/ngcd/provisional/catalog.html |
The list of Known issues is available at the following link.
...
Table 1: Key data fields in the output files.Anchor table1 table1
Variable Name | Description |
lon | longitudes of the grid points |
lat | latitudes of the grid points |
projection_laea | specification of the coordinate reference system |
time_bounds | time bounds of the aggregated variable |
TG / TX / TN / RR | daily variable in the file |
The provided data is single-layered, situated near the surface, and gridded on a regular grid covering Finland, Norway, and Sweden. Excluding a narrow buffer that extends a few kilometers into the sea, the grid is masked in regions beyond this domain and over the ocean due to the absence of in-situ observations. Utilizing the Lambert Azimuthal Equal Area projection as its coordinate reference system, the grid spacing is of 1 km in both the Easting and Northing directions. Specifically, its dimensions span 1550 units in Easting and 2020 in Northing. Figures 5-7 graphically represent this spatial domain.
...
All users of NGCD must provide clear and visible attribution to the Copernicus programme and are asked to cite and reference the dataset provider. Acknowledge according to the licence to use Copernicus Products.
Cite NGCD as indicated on the link to "Citation" under References on the Overview page of NGCD.
...
Example file structure can be seen directly from the web-browser at the following URLs.
Var | URL with example of file structure |
RR | |
TG | |
TX | |
TN |
References
Klein Tank, A. M., Wijngaard, J. B., Können, G. P., Böhm, R. , Demarée, G. , Gocheva, A. , Mileta, M., Pashiardis, S. , Hejkrlik, L. , Kern‐Hansen, C. , Heino, R. , Bessemoulin, P. , Müller‐Westermeier, G. , Tzanakou, M. , Szalai, S. , Pálsdóttir, T. , Fitzgerald, D. , Rubin, S. , Capaldo, M. , Maugeri, M. , Leitass, A. , Bukantis, A. , Aberfeld, R. , van Engelen, A. F., Forland, E. , Mietus, M. , Coelho, F. , Mares, C. , Razuvaev, V. , Nieplova, E. , Cegnar, T. , Antonio López, J. , Dahlström, B. , Moberg, A. , Kirchhofer, W. , Ceylan, A. , Pachaliuk, O. , Alexander, L. V. and Petrovic, P. (2002), Daily dataset of 20th‐century surface air temperature and precipitation series for the European Climate Assessment. Int. J. Climatol., 22: 1441-1453. doi:10.1002/joc.773
...