Technical Notes

This section contains scanned copies of the technical notes published in the first HIRLAM project.

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HIRLAM Technical Note No.1: An approximate method for calculation of surface fluxes in an unstable atmospheric surface layer. HIRLAM Technical Note No.1: An approximate method for calculation of surface fluxes in an unstable atmospheric surface layer.

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by Niels Woetmann Nielsen,

April 1987

HIRLAM Technical Note No.2: Monthly cyclone tracks for Europe and North Atlantic during January-May 1987 HIRLAM Technical Note No.2: Monthly cyclone tracks for Europe and North Atlantic during January-May 1987

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By Rauno Nieminen

June 1987

HIRLAM Technical Note No.3: Sensititivity tests with the limited area version of the ECMWF analysis scheme HIRLAM Technical Note No.3: Sensititivity tests with the limited area version of the ECMWF analysis scheme

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By Nils Gustafsson and Simo Jarvenoja

HIRLAM Technical Note No.4: HIRLAM Workshop on utilization of TOVS data in High Resolution models, Copenhagen 21-23 September 1987 HIRLAM Technical Note No.4: HIRLAM Workshop on utilization of TOVS data in High Resolution models, Copenhagen 21-23 September 1987

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CONTENTS:
List of participants p.2
List of abbreviations p.4
INTRODUCTION p.5
DISCUSSION AND RECOMMENDATIONS p.6
Retrieval methods p.6
Analysis methods p.8
Initialization using diabatic heating p.12
REFERENCES.

ABSTRACTS.
G. Kelly, Use of TOVS at ECMWF in operations p.16
G. Kelly, Present research and anticipated uses of TOVS information at ECMWF p.20
Y. Durand, Mesoscale analysis at DMN (actual state and future) p.21
N.A. Scott, The "3I" system, p.27
N. Gustafsson and J. Svensson, A data assimilation experiment with high resolution TOVS data, p. 36
G.J. Prangsma, Horisontal and vertical structure of synoptic and mesoscale weather systems. Results of the 3I-method applied to NOAA-9 and NOAA-10 data. p.42
M. Steffenssen, Status and plans for the use of TOVS data at the Geophysical Institute Copenhagen University and the Danish Meteorological Institute, p.44
S.Uppala, Planned TOVS processing in Finland, p.46
M. Homleid, J. Sunde and K.H. Midtbo, Use of TOVS data at the Norwegian Meteorological Institute, p.47
J. Svensson, The TOVS processing system at SMHI, p.48

APPENDIX: TOVS data on tape at ECMWF p.50


HIRLAM Technical Note No.5: Cyclone tracks for the autumn and winter period of 1986-1987 HIRLAM Technical Note No.5: Cyclone tracks for the autumn and winter period of 1986-1987

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By Rauno Nieminen

July 1988