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Report on the thirteenth Security Representatives' Meeting, 17-18 May 2005. (Restricted distribution)

Author

P. Prior

2005, Technical memorandum, ECMWF Technical Memoranda

Report on the seventeenth meeting of Computing Representatives, 19-20 May 2005.

Author

P. Prior

2005, Technical memorandum, ECMWF Technical Memoranda

File

11738-report-seventeenth-meeting-computing-representatives-19-20-may-2005.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

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

Diagnostics of linear and incremental approximations in 4D-Var revisited for higher resolution analysis

Author

G. Radnóti

Y. Trémolet

Erik Andersson

L. Isaksen

E. Hólm

Marta Janiskova

2005, Technical memorandum, ECMWF Technical Memoranda

File

11816-diagnostics-linear-and-incremental-approximations-4d-var-revisited-higher-resolution-analysis.pdf

High-frequency AMDAR data - a European aircraft data collection trial and impact assessment.

Author

Erik Andersson

Carla Cardinali

B. Truscott

T. Hovberg

2005, Technical memorandum, ECMWF Technical Memoranda

File

7765-high-frequency-amdar-data-european-aircraft-data-collection-trial-and-impact-assessment.pdf

Will the 4D-Var approach be defeated by nonlinearity?

Author

Erik Andersson

Mike Fisher

E. Hólm

L. Isaksen

G. Radnóti

Y. Trémolet

2005, Technical memorandum, ECMWF Technical Memoranda

File

7768-will-4d-var-approach-be-defeated-nonlinearity.pdf

A multivariate treatment of bias for sequential data assimilation: application to the tropical oceans.

Author

Magdalena Alonso-Balmaseda

D.P. Dee

A. Vidard

D.L.T. Anderson

2005, Technical memorandum, ECMWF Technical Memoranda

File

7910-multivariate-treatment-bias-sequential-data-assimilation-application-tropical-oceans.pdf

A fast radiative transfer model for limb radiances: Accounting for horizontal gradients.

Author

Niels Bormann

Sean Healy

2005, Technical memorandum, ECMWF Technical Memoranda

File

8295-fast-radiative-transfer-model-limb-radiances-accounting-horizontal-gradients.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

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

Towards an integrated seasonal forecasting system for South America.

Author

C. Coelho

D. Stephenson

Magdalena Alonso-Balmaseda

F. Doblas-Reyes

G.J. van Oldenborgh

2005, Technical memorandum, ECMWF Technical Memoranda

File

8744-towards-integrated-seasonal-forecasting-system-south-america.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

Passive microwave radiometer channel selection based on cloud and precipitation information content estimation.

Author

S. Di Michele

Peter Bauer

2005, Technical memorandum, ECMWF Technical Memoranda

File

9040-passive-microwave-radiometer-channel-selection-based-cloud-and-precipitation-information.pdf

Impact of increasing greenhouse gas concentrations in seasonal ensemble forecasts.

Author

F. Doblas-Reyes

Renate Hagedorn

T.N. Palmer

J.-J. Morcrette

2005, Technical memorandum, ECMWF Technical Memoranda

File

9084-impact-increasing-greenhouse-gas-concentrations-seasonal-ensemble-forecasts.pdf

Salinity assimilation using S(T) relationships: Part 1 - Theory.

Author

K. Haines

J. Blower

J-P. Drecourt

C. Liu

I. Astin

X. Zhou

A. Vidard

2005, Technical memorandum, ECMWF Technical Memoranda

File

9742-salinity-assimilation-using-st-relationships-part-1-theory.pdf

Progress in ocean wave forecasting at ECMWF.

Author

Peter Janssen

Jean-Raymond Bidlot

Saleh Abdalla

Hans Hersbach

2005, Technical memorandum, ECMWF Technical Memoranda

File

10187-progress-ocean-wave-forecasting-ecmwf.pdf

The shallow water limit of the Zakharov Equation and consequences for (freak) wave prediction.

Author

Peter Janssen

M. Onorato

2005, Technical memorandum, ECMWF Technical Memoranda

File

10230-shallow-water-limit-zakharov-equation-and-consequences-freak-wave-prediction.pdf

Sensitivity of the tropospheric circulation to changes in the strength of the stratospheric polar vortex.

Author

T. Jung

J. Barkmeijer

2005, Technical memorandum, ECMWF Technical Memoranda

File

10315-sensitivity-tropospheric-circulation-changes-strength-stratospheric-polar-vortex.pdf

Some aspects of systematic error in the ECMWF model.

Author

T. Jung

A.M. Tompkins

Mark Rodwell

2005, Technical memorandum, ECMWF Technical Memoranda

File

10316-some-aspects-systematic-error-ecmwf-model.pdf

Medium-range weather forecasting in the extratropics during wintertime with and without an interactive ocean.

Author

T. Jung

Frédéric Vitart

2005, Technical memorandum, ECMWF Technical Memoranda

File

10319-medium-range-weather-forecasting-extratropics-during-wintertime-and-without-interactive-ocean.pdf

Influence of stochastic physics on the frequency of occurrence of North Pacific weather regimes in the ECMWF model.

Author

T. Jung

T.N. Palmer

G.J. Shutts

2005, Technical memorandum, ECMWF Technical Memoranda

File

10327-influence-stochastic-physics-frequency-occurrence-north-pacific-weather-regimes-ecmwf-model.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

Verification statistics and evaluations of ECMWF forecasts in 2003-2004.

Author

F. Lalaurette

Jean-Raymond Bidlot

Laura Ferranti

A Ghelli

F. Grazzini

Martin Leutbecher

J-E. Paulsen

P. Viterbo

2005, Technical memorandum, ECMWF Technical Memoranda

File

10633-verification-statistics-and-evaluations-ecmwf-forecasts-2003-2004.pdf

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Report on the thirteenth Security Representatives' Meeting, 17-18 May 2005. (Restricted distribution)

Report on the seventeenth meeting of Computing Representatives, 19-20 May 2005.

Sensitivity of forecast error to initial conditions using the adjoint method

Evaluation of forecast error covariance matrix

Diagnostics of linear and incremental approximations in 4D-Var revisited for higher resolution analysis

High-frequency AMDAR data - a European aircraft data collection trial and impact assessment.

Will the 4D-Var approach be defeated by nonlinearity?

A multivariate treatment of bias for sequential data assimilation: application to the tropical oceans.

A fast radiative transfer model for limb radiances: Accounting for horizontal gradients.

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

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

Towards an integrated seasonal forecasting system for South America.

Variational assimilation at ECMWF

Passive microwave radiometer channel selection based on cloud and precipitation information content estimation.

Impact of increasing greenhouse gas concentrations in seasonal ensemble forecasts.

Salinity assimilation using S(T) relationships: Part 1 - Theory.

Progress in ocean wave forecasting at ECMWF.

The shallow water limit of the Zakharov Equation and consequences for (freak) wave prediction.

Sensitivity of the tropospheric circulation to changes in the strength of the stratospheric polar vortex.

Some aspects of systematic error in the ECMWF model.

Medium-range weather forecasting in the extratropics during wintertime with and without an interactive ocean.

Influence of stochastic physics on the frequency of occurrence of North Pacific weather regimes in the ECMWF model.

Synoptic cloudiness validation in the ECMWF model

Verification statistics and evaluations of ECMWF forecasts in 2003-2004.

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