Description of datasets
The Integrated Forecast System (IFS) is the global NWP model suite of the European Centre
for Medium-Range Weather Forecasts (ECMWF).
It runs two times per day for a 10-day forecast. This consists of a 4D-var
data-assimilation system, a high-resolution global forecast run (HRES) and a 51 member
ensemble (ENS) at lower resolution. The output from the model is stored in the MARS archive
and can be accessed for later analysis or research purposes.
IFS uses a spectral grid. The horizontal resolution of the HRES model is currently
approximately 9 km; the horizontal resolution of the ENS model is approximately
18 km. HRES uses 137 layers, ENS 91 layers, both with the highest level at
1.0 Pa. The definition of the levels can be found through the Additional Information
menu on the right.
Extended documentation can be found in ECMWF (2017).
The non-hydrostatic convection-permitting HARMONIE-AROME model is developed in a code
cooperation of the HIRLAM Consortium with Météo-France and ALADIN, and builds upon model
components that have largely initially been developed in these two communities. The forecast
model and analysis of HARMONIE-AROME are originally based on the AROME-France model from
Météo-France (Seity et al, 2011, Brousseau et al, 2011) , but differ from the AROME-France
configuration in various respects. A detailed description of the HARMONIE-AROME forecast
model setup and its similarities and differences with respect to AROME-France can be found
in (Bengtsson et al. 2017). [From: HIRLAM (2017)]
KNMI runs HARMONIE-AROME for a 2000x2000 km area around the Netherlands on a
2.5x2.5 km grid. The models runs every 3 hours for a 48 hour forecast. Lateral boundary
conditions are taken from a special version of the Hirlam limited area model which in its
turn takes its lateral boundary conditions from ECMWF. The current operational model uses
60 levels up to 1.4 Pa, see the Additional Information menu.
Model results are archived for later use.
Relevant parameters from the atmospheric models for dispersion and deposition are
pressure, wind, vertical velocity, temperature, humidity, precipitation, cloud cover,
sensible and latent heat flux, and boundary layer height.
The Levering RIVM
page (see Algemene documentation
in the menu on the
right) lists in more detail the parameters which are currently supplied to RIVM from ECMWF
and the Hirlam limited area model.
- Bengtsson, L., U. Andrae, T. Aspelien, Y. Batrak, J. Calvo, W. de Rooy, E. Gleeson,
B. Hansen-Sass, M. Homleid, M. Hortal, K. Ivarsson, G. Lenderink, S. Niemelä, K. Pagh
Nielsen, J. Onvlee, L. Rontu, P. Samuelsson, D. Santos Muñoz, A. Subias, S. Tijm,
V. Toll, X. Yang, and M. Ødegaard Køltzow (2017).
- The HARMONIE-AROME model configuration in the ALADIN-HIRLAM
NWP system. Mon. Wea. Rev., in press.
Monthly Weather Review, 145(5):1919–1935.
Available from: DOI.
- Brousseau, P., Berre, L., Bouttier, F., and Desroziers, G. (2011).
- Background-error covariances for a convective-scale data-assimilation system:
Arome–france 3d-var. Quarterly Journal of the Royal Meteorological Society,
137(655):409–422. Available from: DOI.
- ECMWF (2017).
- ECMWF forecasts. Available from: ECMWF Internet.
- HIRLAM (2017).
- The HIRLAM homepage. Available from: hirlam.org.
- Seity, Y., Brousseau, P., Malardel, S., Hello, G., Bénard, P., Bouttier, F.,
Lac, C., and Masson, V. (2011).
- The arome-france convective-scale operational model. Monthly Weather Review,
139(3):976–991. Available from: DOI.