HIRLAM Technical Reports

If available, click `pdf' for the full report in pdf, `postscript' for the full report in (usually gzip-ped) postscript, or `abstract' for the abstract of the report.

67. The 'Lorenz' grid computational mode: impliciations for transparent boundary conditions and vertical two grid noise Aidan McDonald. De Bilt, July, 2006.: pdf (1.4 MB, pp 35), abstract
66. Diagnosis of error statistics in the HIRLAM 3D-VAR Beatriz Navascues, Magnus Lindskog, Xiaohua Yang and Bjarne Amstrup. Norrköping, April, 2006.: pdf (1.4 MB, pp 35), abstract
65. Non-hydrostatic adiabatic kernel for HIRLAM. Part IV. Semi-implicit semi-Lagrangian scheme. Rein Rõõm, Aarne Männik and Andres Luhamaa. Norrköping, February, 2006.: pdf (1.2 MB, pp 42), abstract
64. Transparent lateral boundary conditions for systems of equations which support barotropic, baroclinic, and potential vorticity waves. Norrköping, November, 2005.: pdf (0.3 MB, pp 34), abstract
63. Verification of HIRLAM with ECMWF physics compared with HIRLAM reference versions. Cisco de Bruijn and Erik van Meijgaard Norrköping, January, 2005.: pdf (0.8 MB, pp 36), abstract
Evaluation of the international HIRLAM project and HIRLAM operational applications. David Burridge, Erland Källén and Claude Pastre. Norrköping, February, 2005.: pdf (1.3 MB, pp 26),
62. Transparent lateral bounday conditions for HIRLAM. The final shallow water tests and a first multi-level implementation. Aidan McDonald. Norrköping, February, 2004.: pdf (3.1 MB, pp 26), abstract
61. A Feasibility Study of Assimilating European Wind Profiler Data Using the HIRLAM 3D-VAR System. Xiang-Yu Huang and Magnus Lindskog. Norrköping, August, 2003.: pdf (1.9 MB, pp 29), abstract
60. Harald Schyberg, Tomas Landelius, Sigurdur Thorsteinsson, Frank Thomas Tveter, Ole Vignes, Bjarne Amstrup, Nils Gustafsson, Heikki Järvinen and Magnus Lindskog: Assimilation of ATOVS data in the HIRLAM 3D-VAR System Norrköping, January 2003.: pdf (4.4 MB, pp 67), abstract
59. Beatriz Navascués, Ernesto Rodríguez, Juan José Ayuso and Simo Järvenoja: Analysis of surface variables and parameterization of surface processes in HIRLAM. Part II: Seasonal assimilation experiment. Norrköping, January 2003.: pdf (6.0 MB, pp 38), abstract
58. E. Rodrí guez, B. Navascués, J.J. Ayuso and S. Järvenoja: Analysis of surface variables and parameterization of surface processes in HIRLAM. Part I: Approach and verification by parallel runs. Norrköping, January 2003.: pdf (1.1 MB, pp 52), abstract
57. Xiang-Yu Huang, Xiaohua Yang, Nils Gustafsson, Kristian Sten Mogensen, and Magnus Lindskog: Four-dimensional variational data assimilation for a limited area model. Norrköping, December 2002.: pdf (2.7 MB, pp 41), abstract
56. Laura Rontu, Kai Sattler, and Robert Sigg: Parametrization of subgrid-scale orography effects in HIRLAM. Norrköping, October 2002.: pdf (2.9 MB, pp 46), abstract
55. Rein Rõõm, Aarne Männik: Non-hydrostatic Adiabatic Kernel for HIRLAM, Part III: Semi-implicit Eulerian scheme. Norrköping, August 2002.: pdf (1.1 MB, pp 26), abstract
54. Aidan McDonald: Testing Transparent Boundary Conditions for the Shallow Water Equations in a Nested Environment. Norrköping, March 2002.: pdf (0.4 MB, pp 28), abstract
53. Xiang-Yu Huang and Xiaohua Yang: A new implementation of digital filtering initialization schemes for HIRLAM. Norrköping, March 2002.: pdf (0.4 MB, pp 33), abstract
52. M. Lindskog, H. Järvinen, D. B. Michelson: Development of Doppler radar wind data assimilation for the HIRLAM 3D-Var. Norrköping, March 2002.: pdf (1.2 MB, pp 21), abstract
51. Günther Haase and Carl Fortelius: Simulation of radar reflectivities using Hirlam forecasts. Norrköping, October 2001.: pdf (2.1 MB, pp 22), abstract
50. Bent Hansen Sass: Modelling of the time evolution of low tropospheric clouds capped by a stable layer. Norrköping, October 2001.: pdf (0.5 MB, pp 44), abstract
49. A. Männik, R. Rõõm: Nonhydrostatic adiabatic kernel for HIRLAM. Part II. Anelastic, hybrid-coordinate, explicit-Eulerian model. Norrköping, May 2001.: pdf (1.7 MB, pp 51), abstract
48. Rein Rõõm: Nonhydrostatic adiabatic kernel for HIRLAM. Part I. Fundamentals of nonhydrostatic dynamics in pressure-related coordinates. Norrköping, February 2001.: pdf (0.2 MB, pp 25), abstract
47. Aidan McDonald: Well posed boundary conditions for semi-Lagrangian schemes: The two-dimensional case. Norrköping, December, 2000.: postscript (0.1 MB excl figures, pp 36), html (0.4 MB incl figures, pp 36), abstract
46. Bjarne Amstrup and Kristian S. Mogensen: Observing system experiments with the DMI HIRLAM Optimum Interpolation analysis/three-dimensional variational analysis and forecasting system. Norrköping, December 2000.: postscript (1.4 MB, pp 29), abstract
45. Karl-Ivar Ivarsson: Tests with separated tables for water vapor saturation pressure over ice and water. Norrköping, April 2000.: postscript (1.0 MB, pp 20), abstract
44. Aidan McDonald: Well-posed Boundary Conditions for Semi-Lagrangian Schemes: The One-dimensional Case, Part II. Norrköping, January, 2000.: postscript (0.3 MB, pp 19),
43. Aidan McDonald: Well-posed Boundary Conditions for Semi-Lagrangian Schemes: The One-dimensional Case. Dublin, July, 1999.: postscript (0.3 MB, pp 26),
42. Peter Lynch, Ray McGrath and Aidan McDonald: Digital Filter Initialization for HIRLAM. Dublin, June, 1999.: postscript (1.2 MB, pp 22), abstract
41. Ivar Lie: Some aspects of non-hydrostatic models in the HIRLAM perspective. Dublin, May, 1999.
40. Nils Gustafsson et al.: Three-dimensional Variational Data Assimilation for a High Resolution Limited Area Model (HIRLAM). Dublin, January, 1999.
39. Annica Ekman and Erland Källén: Mass Conservation Tests with the HIRLAM Semi-Lagrangian Time Integration Scheme. Dublin, December, 1998.
38. Bjarne Amstrup and Xiang-Yu Huang: Impact of the Additional FASTEX Radiosonde Observations on the HIRLAM Data Assimilation and Forecasting System. Dublin, October, 1998.
37. Cisco de Bruijn: Precipitation Forecasts with a Very High Resolution Version of HIRLAM for the TelFlood Project. Dublin, August, 1998.
36. Thor Erik Nordeng, Lars Anders Breivik, Anstein Foss and Knut Helge Midtbø: A Simple and Efficient Method to Obtain Flow Dependent Structure Functions for Objective Analysis of Weather Elements. Dublin, August, 1998.
35. Marja Bister: Cumulus Parameterisation in Regional Forecast Models: A Review. Dublin, August, 1998.
34. McDonald, A: Alternative Extrapolations to find the Departure Point in a `Two Time Level' Semi-Lagrangian Integration. Dublin, June, 1998.
33. Mogensen, K.S. and Xiang-Yu Huang: Variational Parameter Estimation with the Lorenz Model. Dublin, June, 1998.
32. McDonald, A.: Lateral boundary conditions for operational regional forecast models; a review. Dublin, November, 1997.
31. Stoffelen, A. and P. van Beukering: Implementation of improved ERS scatterometer data processing and its impact on HIRLAM short range weather forecasts. Dublin, November, 1997.
30. Berre, L.: Non-separable structure functions for the HIRLAM 3DVAR. Dublin, November, 1997.
29. Kristjánsson, J E and Thorsteinsson, S and Úlfarsson, G.: Potential Vorticity Based Interpretation of the Evolution of the Greenhouse Low, 3 Feb 1991. Norrköping, January 1997.
28. Navascués, B.: Analysis of 2 meter Temperature and Relative Humidity. Norrköping, January 1997.
27. McDonald, A.: Sources of noise in the ``physics''; a preliminary study. Norrköping, November 1996.
26. Xiang-Yu Huang and Xiaohua Yang: Variational data assimilation with the Lorenz model. Norrköping, April 1996.: postscript (0.2 MB, pp 42), abstract
25. Perov, V and Gollvik, S.: A 1-D Test of a Nonlocal, E-e Boundary Layer Scheme for a NWP Model Resolution. Norrköping, April 1996.
24. Lynch, P.: A Simple Filter for Initialization, Norrköping, March 1996.
23. Bringfelt, B.: Tests of a new land surface treatment in HIRLAM. Norrköping February 1996.
22. Lönnberg, P.: Observing system experiments on North Atlantic radiosondes. Norrköping, February 1996.
21. Xiang-Yu Huang: Initialization of cloud water content in the HIRLAM data assimilation system. Norrköping, August 1995.: postscript (0.2 MB, pp 24), abstract
20. Bazile, E.: Study of a prognostic cloud scheme in Arpège. Norrköping, August 1995.: postscript (5.9 MB, pp 65), abstract
19. Bringfelt, B., Gustafsson, N., Vilmusenaho, P. and Järvenoja, S.: Updating of the HIRLAM physiography and climate data base. Norrköping, June 1995.
18. Gollvik, S., Bringfelt, B., Perov, V., Holtslag, A. A. M.: Experiments with nonlocal vertical diffusion in HIRLAM. Norrköping, March 1995.
17. McDonald, A.: The HIRLAM two time level, three dimensional semi-Lagranian, semi-implicit, limited area, grid point model of the primitive equations. Norrköping, March 1995.

16. Bent Hansen Sass, Laura Rontu and Petri Räisänen. HIRLAM-2 Radiation Scheme: Documentation and Tests. Norrköping, December 1994.: postscript (0.2 MB, pp 42), abstract
15. Sass, B.H. and Christensen, J.H.: A Simple Framework for Testing the Quality of Atmospheric Limited Area Models. Norrköping, August 1994.
14. Kristjánsson, J.E. and Thorsteinsson, S.: Simulations of intense cyclones near Iceland. Norrköping, March 1994.
13. Eerola, K.: Experimentation with Second and Fourth Order Horizontal Diffusion Schemes. October 1993.
12. Lynch, P. and Huang, X.-Y.: Initialization Schemes for HIRLAM based on Recursive Digital Filters. October 1993.: postscript (0.1 MB, pp 35; sorry, no figures), abstract
11. Huang, X.-Y., Cederskov, A. and Källén, E.: A Comparison between Digital Filtering Initialization and Nonlinear Normal Mode Initialization in a Data Assimilation System. June 1993.
10. Lynch, P.: Digital Filters for Numerical Weather Prediction. January 1993.: postscript (0.1 MB, pp 42; sorry, no figures), abstract
9. Gustafsson, N. HIRLAM 2 Final Report. Norrköping, March 1993.
8. HIRLAM Workshop on Mesoscale Modelling-Copenhagen, Denmark, 3-5 September 1990. December 1990.
7. Kristjánsson, J.E. and Huang, X.-Y. Implementation of a consistent scheme for condensation and clouds in HIRLAM. December 1990.
6. Lynch, P. and McGrath, R. Spectral Synthesis on Rotated and Regular Grids. December 1990.
5. Machenhauer, B. HIRLAM Final Report. Copenhagen, December 1988.
4. Myrberg, K., Koistinen, J. and Järvenoja, S. A case study of non-forecasted cyclogenesis in polar air mass over the Baltic sea. Helsinki, November 1988.
3. Gustafsson, N. and Svensson, J. A data assimilation experiment with high resolution TOVS data. Norrköping, January 1988.
2. Nordeng, T.E. and Foss, A. Simulations of storms within the HIRLAM baseline experiment with the Norwegian mesoscale limited area model system. Oslo, March 1987.
1. Gustafsson, N., Järvenoja, S., Kållberg, P. and Nielsen, N.W. Baseline experiments with a high resolution limited area model. Copenhagen, November 1986.