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Computation of optimal perturbations using a local projection operator: A winter casestudy

Author

Roberto Buizza

1993, Technical memorandum, ECMWF Technical Memoranda

File

8413-computation-optimal-perturbations-using-local-projection-operator-winter-casestudy.pdf

Sensitivity of forecast error to initial conditions using the adjoint method

Author

Florence Rabier

P. Courtier

M. Herveou

B. Strauss

A Persson

1993, Technical memorandum, ECMWF Technical Memoranda

File

11789-sensitivity-forecast-error-initial-conditions-using-adjoint-method.pdf

Variational assimilation at ECMWF

Author

P. Courtier

Erik Andersson

W.A. Heckley

G.A. Kelly

J. Pailleux

Florence Rabier

Jean-Noël Thépaut

P. Undén

Drasko Vasiljevic

Carla Cardinali

J. Eyre

M. Hamrud

J. Haseler

A. Hollingsworth

A. McNally

A. Stoffelen

1993, Technical memorandum, ECMWF Technical Memoranda

File

8786-variational-assimilation-ecmwf.pdf

Evaluation of forecast error covariance matrix

Author

Florence Rabier

A. McNally

1993, Technical memorandum, ECMWF Technical Memoranda

File

11801-evaluation-forecast-error-covariance-matrix.pdf

Synoptic cloudiness validation in the ECMWF model

Author

N.G. Kvamstø

1993, Technical memorandum, ECMWF Technical Memoranda

File

10579-synoptic-cloudiness-validation-ecmwf-model.pdf

Impact of a simple vertical diffusion scheme and of the optimisation time interval onoptimal unstable structures

Author

Roberto Buizza

1993, Technical memorandum, ECMWF Technical Memoranda

File

8412-impact-simple-vertical-diffusion-scheme-and-optimisation-time-interval-onoptimal-unstable.pdf

A pilot study on the prediction of medium range forecast quality

Author

S. Grönås

1985, Technical memorandum, ECMWF Technical Memoranda

File

9665-pilot-study-prediction-medium-range-forecast-quality.pdf

A standardised verification scheme for local weather forecasts

Author

H. Daan

1985, Technical memorandum, ECMWF Technical Memoranda

File

8883-standardised-verification-scheme-local-weather-forecasts.pdf

Statistical assessment of an observing system experiment based on frequency distributions of 500 hPa differences

Author

P. Emmrich

P.W. Kållberg

1985, Technical memorandum, ECMWF Technical Memoranda

File

9290-statistical-assessment-observing-system-experiment-based-frequency-distributions-500-hpa.pdf

On the use of cloud track wind data from FGGE in the upper troposphere

Author

P.W. Kållberg

1985, Technical memorandum, ECMWF Technical Memoranda

File

10591-use-cloud-track-wind-data-fgge-upper-troposphere.pdf

The effects of mechanical forcing on the mean meridional circulation of the atmosphere

Author

G-X. Wu

S. Tibaldi

1985, Technical memorandum, ECMWF Technical Memoranda

File

13157-effects-mechanical-forcing-mean-meridional-circulation-atmosphere.pdf

Current and planned meteorological applications systems at ECMWF

Author

J. Gibson

1985, Technical memorandum, ECMWF Technical Memoranda

File

9564-current-and-planned-meteorological-applications-systems-ecmwf.pdf

The ECMWF climate system

Author

C. Brankovic

J. Van Maanen

1985, Technical memorandum, ECMWF Technical Memoranda

File

8377-ecmwf-climate-system.pdf

FGGE moisture analysis and assimilation in the ECMWF system

Author

R.J. Pasch

L. Illari

1985, Technical memorandum, ECMWF Technical Memoranda

File

11611-fgge-moisture-analysis-and-assimilation-ecmwf-system.pdf

Development of the operational parameterization scheme

Author

M. Tiedtke

J.M. Slingo

1985, Technical memorandum, ECMWF Technical Memoranda

File

12746-development-operational-parameterization-scheme.pdf

Development of the high resolution model

Author

M. Jarraud

Adrian Simmons

M. Kanamitsu

1985, Technical memorandum, ECMWF Technical Memoranda

File

10254-development-high-resolution-model.pdf

A memory manager for single and multi-tasking applications

Author

J. Gibson

D. Dent

1985, Technical memorandum, ECMWF Technical Memoranda

File

9571-memory-manager-single-and-multi-tasking-applications.pdf

The impact of the El NIno anomaly on the mean meridional circulation as simulated by a high resolution model

Author

G-X. Wu

U. Cubasch

1985, Technical memorandum, ECMWF Technical Memoranda

File

13156-impact-el-nino-anomaly-mean-meridional-circulation-simulated-high-resolution-model.pdf

Practical considerations concerning the use of the planetary boundary layer top as acoordinate surface

Author

D.A. Randall

1985, Technical memorandum, ECMWF Technical Memoranda

File

11821-practical-considerations-concerning-use-planetary-boundary-layer-top-acoordinate-surface.pdf

Extensions to AF 82 GRIB (Gridded Binary)

Author

J. Gibson

1985, Technical memorandum, ECMWF Technical Memoranda

File

9563-extensions-af-82-grib-gridded-binary.pdf

Predictability studies with the ECMWF model for the extended range: The impact ofhorizontal resolution and boundary layer forcing

Author

U. Cubasch

A.C. Wiin-Nielsen

1985, Technical memorandum, ECMWF Technical Memoranda

File

8821-predictability-studies-ecmwf-model-extended-range-impact-ofhorizontal-resolution-and-boundary.pdf

Systematic errors in surface and upper lows in ECMWF's operational spectral model for the 1983-1984 winter season and comparing these to the relevant errors in grid point model

Author

V. Akyildiz

1985, Technical memorandum, ECMWF Technical Memoranda

File

7660-systematic-errors-surface-and-upper-lows-ecmwfs-operational-spectral-model-1983-1984-winter.pdf

Estimates of round-off error in the inversion of positive definite matrices

Author

A. Hollingsworth

G.J. Cats

1985, Technical memorandum, ECMWF Technical Memoranda

File

9963-estimates-round-error-inversion-positive-definite-matrices.pdf

A valley-filled orographic representation in numerical weather forecast models

Author

D. Radinovic

1985, Technical memorandum, ECMWF Technical Memoranda

File

11812-valley-filled-orographic-representation-numerical-weather-forecast-models.pdf

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Computation of optimal perturbations using a local projection operator: A winter casestudy

Sensitivity of forecast error to initial conditions using the adjoint method

Variational assimilation at ECMWF

Evaluation of forecast error covariance matrix

Synoptic cloudiness validation in the ECMWF model

Impact of a simple vertical diffusion scheme and of the optimisation time interval onoptimal unstable structures

A pilot study on the prediction of medium range forecast quality

A standardised verification scheme for local weather forecasts

Statistical assessment of an observing system experiment based on frequency distributions of 500 hPa differences

On the use of cloud track wind data from FGGE in the upper troposphere

The effects of mechanical forcing on the mean meridional circulation of the atmosphere

Current and planned meteorological applications systems at ECMWF

The ECMWF climate system

FGGE moisture analysis and assimilation in the ECMWF system

Development of the operational parameterization scheme

Development of the high resolution model

A memory manager for single and multi-tasking applications

The impact of the El NIno anomaly on the mean meridional circulation as simulated by a high resolution model

Practical considerations concerning the use of the planetary boundary layer top as acoordinate surface

Extensions to AF 82 GRIB (Gridded Binary)

Predictability studies with the ECMWF model for the extended range: The impact ofhorizontal resolution and boundary layer forcing

Systematic errors in surface and upper lows in ECMWF's operational spectral model for the 1983-1984 winter season and comparing these to the relevant errors in grid point model

Estimates of round-off error in the inversion of positive definite matrices

A valley-filled orographic representation in numerical weather forecast models

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