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Estimating background-error variances with the ECMWF Ensemble of Data Assimilations system: the effect of ensemble size and day-to-day variability

Author

Massimo Bonavita

L. Raynaud

L. Isaksen

2010, Technical memorandum, ECMWF Technical Memoranda

File

8268-estimating-background-error-variances-ecmwf-ensemble-data-assimilations-system-effect-ensemble.pdf

Enhancing the impact of IASI observations through an updated observation error covariance matrix

Author

Niels Bormann

Massimo Bonavita

Rossana Dragani

Reime Eresmaa

Marco Matricardi

A. McNally

2015, Technical memorandum, ECMWF Technical Memoranda

File

8292-enhancing-impact-iasi-observations-through-updated-observation-error-covariance-matrix.pdf

Jason-2 OGDR Wind and wave products: random error estimation

Author

Saleh Abdalla

Peter Janssen

Jean-Raymond Bidlot

2010, Technical memorandum, ECMWF Technical Memoranda

File

7628-jason-2-ogdr-wind-and-wave-products-random-error-estimation.pdf

A parameterization of cloud overlap as a function of wind shear and its impact in ECMWF forecast

Author

Francesca Di Giuseppe

A.M. Tompkins

2015, Technical memorandum, ECMWF Technical Memoranda

File

9032-parameterization-cloud-overlap-function-wind-shear-and-its-impact-ecmwf-forecast.pdf

Forecast quality assessment of the ENSEMBLES seasonal-to-decadal Stream 2 hindcasts

Author

F. Doblas-Reyes

Antje Weisheimer

T.N. Palmer

J. Murphy

D.M. Smith

2010, Technical memorandum, ECMWF Technical Memoranda

File

9071-forecast-quality-assessment-ensembles-seasonal-decadal-stream-2-hindcasts.pdf

Decadal climate prediction with the ECMWF coupled forecast system: Impact of ocean observations

Author

F. Doblas-Reyes

Magdalena Alonso-Balmaseda

Antje Weisheimer

T.N. Palmer

2010, Technical memorandum, ECMWF Technical Memoranda

File

9078-decadal-climate-prediction-ecmwf-coupled-forecast-system-impact-ocean-observations.pdf

Direct 4D-Var assimilation of all-sky radiances. Part I: Implementation

Author

Peter Bauer

Alan Geer

Philippe Lopez

Deborah Salmond

2010, Technical memorandum, ECMWF Technical Memoranda

File

7987-direct-4d-var-assimilation-all-sky-radiances-part-i-implementation.pdf

Impact of truncation on variable resolution forecasts

Author

Roberto Buizza

2010, Technical memorandum, ECMWF Technical Memoranda

File

8431-impact-truncation-variable-resolution-forecasts.pdf

Horizontal resolution impact on short- and long-range forecast error

Author

Roberto Buizza

2010, Technical memorandum, ECMWF Technical Memoranda

File

8432-horizontal-resolution-impact-short-and-long-range-forecast-error.pdf

The Forecast Skill Horizon

Author

Roberto Buizza

Martin Leutbecher

2015, Technical memorandum, ECMWF Technical Memoranda

File

8450-forecast-skill-horizon.pdf

Implementation of an ocean mixed layer model in IFS

Author

Y Takaya

Frédéric Vitart

Gianpaolo Balsamo

Magdalena Alonso-Balmaseda

Martin Leutbecher

Franco Molteni

2010, Technical memorandum, ECMWF Technical Memoranda

File

12540-implementation-ocean-mixed-layer-model-ifs.pdf

Evaluation of ECMWF forecasts, including 2014-2015 upgrades

Author

Thomas Haiden

F. Prates

2015, Technical memorandum, ECMWF Technical Memoranda

File

14691-evaluation-ecmwf-forecasts-including-2014-2015-upgrades.pdf

An evaluation of FY-3C satellite data quality at ECMWF and the Met Office

Author

Qifeng Lu

Heather Lawrence

Niels Bormann

Stephen English

Katie Lean

Nigel Atkinson

W. Bell

F. Carminati

2015, Technical memorandum, ECMWF Technical Memoranda

File

14692-evaluation-fy-3c-satellite-data-quality-ecmwf-and-met-office.pdf

Impacts of parameterized orographic drag on the Northern Hemisphere winter circulation

Author

Irina Sandu

Peter Bechtold

Anton Beljaars

Alessio Bozzo

Felix Pithan

T.G. Shepherd

Ayrton Zadra

2015, Technical memorandum, ECMWF Technical Memoranda

File

14694-impacts-parameterized-orographic-drag-northern-hemisphere-winter-circulation.pdf

Sensitivity of L-Band NWP forward modelling to soil roughness

Author

J.M. Sabater

Patricia de Rosnay

Gianpaolo Balsamo

2010, Technical memorandum, ECMWF Technical Memoranda

File

13284-sensitivity-l-band-nwp-forward-modelling-soil-roughness.pdf

Forecasts and assimilation experiments of the Antarctic Ozone Hole 2008

Author

Johannes Flemming

Antje Inness

Luke Jones

H. Eskes

V. Huijnen

D. Kinnison

M.G. Schultz

O. Stein

D. Cariolle

G.P. Brasseur

2010, Technical memorandum, ECMWF Technical Memoranda

File

9428-forecasts-and-assimilation-experiments-antarctic-ozone-hole-2008.pdf

Assessment of AMV's from COMS in the ECMWF system

Author

S-H. Lee

Kirsti Salonen

Niels Bormann

2015, Technical memorandum, ECMWF Technical Memoranda

File

10690-assessment-amvs-coms-ecmwf-system.pdf

Direct 4D-Var assimilation of NCEP Stage IV radar and gauge precipitation data at ECMWF

Author

Philippe Lopez

2010, Technical memorandum, ECMWF Technical Memoranda

File

10805-direct-4d-var-assimilation-ncep-stage-iv-radar-and-gauge-precipitation-data-ecmwf.pdf

A principal component based version of the RTTOV fast radiative transfer model.

Author

Marco Matricardi

2010, Technical memorandum, ECMWF Technical Memoranda

File

11026-principal-component-based-version-rttov-fast-radiative-transfer-model.pdf

The ENSO signal in atmospheric composition fields: Emission driven versus dynamically induced changes

Author

Antje Inness

Angela Benedetti

Johannes Flemming

Mark Parrington

J. Kaiser

S. Remy

2015, Technical memorandum, ECMWF Technical Memoranda

File

10108-enso-signal-atmospheric-composition-fields-emission-driven-versus-dynamically-induced-changes.pdf

Ensemble of data assimilations at ECMWF

Author

L. Isaksen

Massimo Bonavita

Roberto Buizza

Mike Fisher

J. Haseler

Martin Leutbecher

Laure Raynaud

2010, Technical memorandum, ECMWF Technical Memoranda

File

10125-ensemble-data-assimilations-ecmwf.pdf

Notes on the maximum wave height distribution

Author

Peter Janssen

2015, Technical memorandum, ECMWF Technical Memoranda

File

10185-notes-maximum-wave-height-distribution.pdf

Ocean wave effects on the daily cycle in STT

Author

Peter Janssen

2010, Technical memorandum, ECMWF Technical Memoranda

File

10212-ocean-wave-effects-daily-cycle-stt.pdf

The ECMWF model climate: Recent progress through improved physical parametrizations

Author

T. Jung

Peter Bechtold

Anton Beljaars

M. Köhler

M.J. Miller

J.-J. Morcrette

A. Orr

Mark Rodwell

A.M. Tompkins

2010, Technical memorandum, ECMWF Technical Memoranda

File

10317-ecmwf-model-climate-recent-progress-through-improved-physical-parametrizations.pdf

Search ECMWF publications

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Estimating background-error variances with the ECMWF Ensemble of Data Assimilations system: the effect of ensemble size and day-to-day variability

Enhancing the impact of IASI observations through an updated observation error covariance matrix

Jason-2 OGDR Wind and wave products: random error estimation

A parameterization of cloud overlap as a function of wind shear and its impact in ECMWF forecast

Forecast quality assessment of the ENSEMBLES seasonal-to-decadal Stream 2 hindcasts

Decadal climate prediction with the ECMWF coupled forecast system: Impact of ocean observations

Direct 4D-Var assimilation of all-sky radiances. Part I: Implementation

Impact of truncation on variable resolution forecasts

Horizontal resolution impact on short- and long-range forecast error

The Forecast Skill Horizon

Implementation of an ocean mixed layer model in IFS

Evaluation of ECMWF forecasts, including 2014-2015 upgrades

An evaluation of FY-3C satellite data quality at ECMWF and the Met Office

Impacts of parameterized orographic drag on the Northern Hemisphere winter circulation

Sensitivity of L-Band NWP forward modelling to soil roughness

Forecasts and assimilation experiments of the Antarctic Ozone Hole 2008

Assessment of AMV's from COMS in the ECMWF system

Direct 4D-Var assimilation of NCEP Stage IV radar and gauge precipitation data at ECMWF

A principal component based version of the RTTOV fast radiative transfer model.

The ENSO signal in atmospheric composition fields: Emission driven versus dynamically induced changes

Ensemble of data assimilations at ECMWF

Notes on the maximum wave height distribution

Ocean wave effects on the daily cycle in STT

The ECMWF model climate: Recent progress through improved physical parametrizations

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