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18658-development-and-evaluation-process-followed-ecmwf-upgrade-integrated-forecasting-system-ifs.pdf

Andrew Brown

S.J. English

T. Haiden

M. Sleigh

N. Wedi

2018, Technical memorandum, ECMWF Technical Memoranda

File

Impact of sea surface temperature biases on extended-range forecasts

Author

18659-impact-sea-surface-temperature-biases-extended-range-forecasts.pdf

2018, Technical memorandum, ECMWF Technical Memoranda

File

Evaluation of ECMWF forecasts, including the 2018 upgrade

Author

T. Haiden

Martin Janousek

Jean-Raymond Bidlot

R. Buizza

L. Ferranti

F. Prates

18746-evaluation-ecmwf-forecasts-including-2018-upgrade.pdf

2018, Technical memorandum, ECMWF Technical Memoranda

File

A new hybrid formulation for the background error covariance in the IFS: Implementation aspects

Author

Sebastien Massart

2018, Technical memorandum, ECMWF Technical Memoranda

File

18747-new-hybrid-formulation-background-error-covariance-ifs-implementation-aspects.pdf

Nonlinear effects in 4D-Var

Author

18596-nonlinear-effects-4d-var.pdf

Peter Lean

Elias Hólm

2018, Technical memorandum, ECMWF Technical Memoranda

File

Computational aspects and performance evaluation of the IFS-XIOS integration

Author

X. Yepes-Arbos

M. Acosta

G. van den Oord

Glenn Carver

2018, Technical memorandum, ECMWF Technical Memoranda

File

18597-computational-aspects-and-performance-evaluation-ifs-xios-integration.pdf

OCEAN5: The ECMWF Ocean Reanalysis System and its Real-Time analysis component

Author

Hao Zuo

18519-ocean5-ecmwf-ocean-renalysis-system-and-its-real-time-analysis-component.pdf

K. Mogensen

Steffen Tietsche

2018, Technical memorandum, ECMWF Technical Memoranda

File

Implicit and explicit cross-correlations in coupled data assimilation

Author

Patrick Laloyaux

S. Frolov

B. Ménétrier

18552-implicit-and-explicit-cross-correlations-coupled-data-assimilation.pdf

2018, Technical memorandum, ECMWF Technical Memoranda

File

Report on Stratosphere Task Force

Author

T.G. Shepherd

I. Polichtchouk

Robin Hogan

A.J. Simmons

2018, Technical memorandum, ECMWF Technical Memoranda

File

18259-report-stratosphere-task-force.pdf

Forecasting tropical cyclone landfall using ECMWF's seasonal forecasts from System 4

Author

D.L. Bergman

L. Magnusson

J. Nilsson

17679-forecasting-tropical-cyclone-landfall-using-ecmwfs-seasonal-forecasts-system4.pdf

2017, Technical memorandum, ECMWF Technical Memoranda

File

Evidence of a stratospheric methane bias in the IFS against MIPAS data

Author

Sebastien Massart

Anna Agusti-Panareda

Johannes Flemming

2017, Technical memorandum, ECMWF Technical Memoranda

File

17698-evidence-stratospheric-methane-bias-ifs-against-mipas-data.pdf

Assimilating observations sensitive to cloud and precipitation

Author

Maike Ahlgrimm

Stephen English

Mark Fielding

Elias Hólm

Philippe Lopez

Marco Matricardi

Irina Sandu

P. Weston

2017, Technical memorandum, ECMWF Technical Memoranda

File

17718-assimilating-observations-sensitive-cloud-and-precipitation.pdf

Radiation in numerical weather prediction

Author

Robin Hogan

Maike Ahlgrimm

Gianpaolo Balsamo

Anton Beljaars

P. Berrisford

Alessio Bozzo

Francesca Di Giuseppe

R.M. Forbes

Thomas Haiden

Simon Lang

Michael Mayer

I. Polichtchouk

Irina Sandu

17771-radiation-numerical-weather-prediction.pdf

Nils Wedi

2017, Technical memorandum, ECMWF Technical Memoranda

File

A generic ensemble generation scheme for data assimilation and ocean analysis

Author

Hao Zuo

17831-generic-ensemble-generation-scheme-data-assimilation-and-ocean-analysis.pdf

Eric de Boisseson

S. Hirahara

Marcin Chrust

Patricia de Rosnay

2017, Technical memorandum, ECMWF Technical Memoranda

File

The ECMWF research to operations (R20) process

Author

Roberto Buizza

Erik Andersson

Richard Forbes

M. Sleigh

2017, Technical memorandum, ECMWF Technical Memoranda

File

17549-ecmwf-research-operations-r20-process.pdf

An assessment of different radiosonde types 2015/2016

Author

B. Ingleby

2017, Technical memorandum, ECMWF Technical Memoranda

File

17551-assessment-different-radiosonde-types-20152016.pdf

"Time" -parallel diffusion-based correlation operators

Author

A.T. Weaver

S. Gurol

J. Tshimanga

Marcin Chrust

A. Piacentini

2017, Technical memorandum, ECMWF Technical Memoranda

File

17578-time-parallel-diffusion-based-correlation-operators.pdf

What influences the middle atmosphere circulation in the IFS?

Author

I. Polichtchouk

T.G. Shepherd

S. Malardel

2017, Technical memorandum, ECMWF Technical Memoranda

File

17670-what-influences-middle-atmosphere-circulation-ifs.pdf

Modeling of nonlocal thermodynamic equilibrium effects in the classical and principal component based version of the RTTOV fast radiative transfer model

Author

Marco Matricardi

López Puertas

B. Funke

2017, Technical memorandum, ECMWF Technical Memoranda

File

17672-modeling-nonlocal-thermodynamic-equilibrium-effects-classical-and-principal-component-based.pdf

Assessment of the forecast impact of suface-sensitive microwave radiances over land and sea-ice

Author

Niels Bormann

Cristina Lupu

Alan Geer

Heather Lawrence

P. Weston

Stephen English

2017, Technical memorandum, ECMWF Technical Memoranda

File

17674-assessment-forecast-impact-suface-sensitive-microwave-radiances-over-land-and-sea-ice.pdf

On the initialization of Tropical Cyclones

Author

17677-initialization-tropical-cyclones.pdf

Mohamed Dahoui

Philippe Lopez

F. Prates

Elias Hólm

Giovanna De Chiara

Alan Geer

L. Isaksen

B. Ingleby

2017, Technical memorandum, ECMWF Technical Memoranda

File

Tropical Cyclone Sensitivity to Ocean Coupling

Author

K.S. Mogensen

L. Magnusson

Jean-Raymond Bidlot

2017, Technical memorandum, ECMWF Technical Memoranda

File

16980-tropical-cyclone-sensitivity-ocean-coupling.pdf

A Strategy for Data Assimilation

Author