...
| 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 |
General definitions
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/cdsapp#!/dataset/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. 23.03 (for different versions, replace 23.03 with the correct label) | https://thredds.met.no/thredds/catalog/ngcd/version_23.03/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 |
daily variable in the file |
The data are provided on a single layer, near the surface, and on a regular grid covering Finland, Norway and Sweden. The grid is masked outside the domain and over the sea, where no in-situ observations are available, apart from a buffer extending over the sea for a few kilometers. The coordinate reference system is the Lambert Azimuthal Equal Area projection and the grid has a resolution of 1 km in both the Easting and Northing directions. The dimension of the data field is 1550 in the Easting and 2020 in the Northing. The spatial domain is shown in Figures 5-7.
...
Figure 9: Daily mean temperature (TG, oC) for 30 May 2021: NGCD-1 on the left; NGCD-2 on the right.
Anchor figure10 figure10
Figure 10: Daily minimum and maximum temperatures (TN top row, TX bottom row, oC) for 30 May 2021: NGCD-1 in the left column; NGCD-2 in the right column.
...
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
...