Technical Memoranda

844
Beena Balan-Sarojini; Steffen Tietsche; Michael Mayer; Magdalena Alonso-Balmaseda; Hao Zuo
Towards Improved Sea Ice Initialization and Forecasting with the IFS
03/2019
18918-towards-improved-sea-ice-initialization-and-forecasting-ifs.pdf
843
J. Munoz-Sabater; H. Lawrence; C. Albergel; Patricia de Rosnay; L. Isaksen; S. Mecklenburg; Y. Kerr; M. Drusch
Assimilation of SMOS brightness temperatures in the ECMWF IFS
02/2019
18897-assimilation-smos-brightness-temperatures-ecmwf-ifs.pdf
841
Frédéric Vitart; Gianpaolo Balsamo; Jean-Raymond Bidlot; Simon Lang; Ivan Tsonevsky; David Richardson; Magdalena Alonso-Balmaseda
Use of ERA5 to Initialize Ensemble Re-forecasts
02/2019
18872-use-era5-initialize-ensemble-re-forecasts.pdf
840
Tim Hewson
Use and Verification of ECMWF Products in Member and Co-operating States (2018)
03/2019
18911-use-and-verification-ecmwf-products-member-and-co-operating-states-2018.pdf
839
Niels Bormann; Heather Lawrence; Jacqueline Farnan
Global observing system experiments in the ECMWF assimilation system
01/2019
18859-global-observing-system-experiments-ecmwf-assimilation-system.pdf
838
Antje Inness; Ilse Alben; Anna Agusti-Panareda; Tobias Borsdoff; Johannes Flemming; Jochen Landgraf; Roberto Ribas
Monitoring and assimilation of early TROPOMI total column carbon monoxide data in the CAMS system
01/2019
18861-monitoring-and-assimilation-early-tropomi-total-column-carbon-monoxide-data-cams-system.pdf
836
Philip Browne; Patricia de Rosnay; Hao Zuo; Andrew Bennett; Andrew Dawson
Weakly coupled ocean-atmosphere data assimilation in the ECMWF NWP system
01/2019
18814-weakly-coupled-ocean-atmosphere-data-assimilation-ecmwf-nwp-system.pdf
835
Tim Stockdale; Magdalena Alonso-Balmaseda; Stephanie Johnson; Laura Ferranti; Franco Molteni; L. Magnusson; Steffen Tietsche; Frédéric Vitart; Damien Decremer; Antje Weisheimer; Christopher Roberts; Gianpaolo Balsamo; Sarah Keeley; Kristian Mogensen; Hao Zuo; Michael Mayer; B.M. Monge-Sanz
SEAS5 and the future evolution of the long-range forecast system
11/2018
18750-seas5-and-future-evolution-long-range-forecast-system.pdf
834
T. Haiden; M. Dahoui; B. Ingleby; P. de Rosnay; Crtistina Prates; Ersagun Kuscu; Tim Hewson; L. Isaksen; David Richardson; Hao Zuo; Luke Jones
Use of in situ surface observations at ECMWF
11/2018
18748-use-situ-surface-observations-ecmwf.pdf
833
Rossana Dragani; Angela Benedetti; Johannes Flemming; Gianpaolo Balsamo; Michail Diamantakis; Alan Geer; Robin Hogan; Tim Stockdale; Melanie Ades; Anna Agusti-Panareda; J. Barré; Peter Bechtold; Alessio Bozzo; Hans Hersbach; Elias Hólm; Zak Kipling; Antje Inness; Julie Letertre-Danczak; Sebastien Massart; Marco Matricardi; Tony McNally; Mark Parrington; Irina Sandu; Cornel Soci; Frédéric Vitart
Atmospheric Composition priority developments for Numerical Weather Prediction
12/2018
18769-atmospheric-composition-priority-developments-numerical-weather-prediction.pdf
832
Sebastien Massart
A new hybrid formulation for the background error covariance in the IFS: Implementation aspects
10/2018
18747-new-hybrid-formulation-background-error-covariance-ifs-implementation-aspects.pdf
831
T. Haiden; Martin Janousek; Jean-Raymond Bidlot; R. Buizza; L. Ferranti; F. Prates; Frédéric Vitart
Evaluation of ECMWF forecasts, including the 2018 upgrade
10/2018
18746-evaluation-ecmwf-forecasts-including-2018-upgrade.pdf
830
Frédéric Vitart; Magdalena Alonso-Balmaseda
Impact of sea surface temperature biases on extended-range forecasts
10/2018
18659-impact-sea-surface-temperature-biases-extended-range-forecasts.pdf
829
R. Buizza; Magdalena Alonso-Balmaseda; Andrew Brown; S.J. English; Richard Forbes; Alan Geer; T. Haiden; Martin Leutbecher; L. Magnusson; Mark Rodwell; M. Sleigh; Tim Stockdale; Frédéric Vitart; N. Wedi
The development and evaluation process followed at ECMWF to upgrade the Integrated Forecasting System (IFS)
10/2018
18658-development-and-evaluation-process-followed-ecmwf-upgrade-integrated-forecasting-system-ifs.pdf
828
Massimo Bonavita; Peter Lean; Elias Hólm
Nonlinear effects in 4D-Var
09/2018
18596-nonlinear-effects-4d-var.pdf
827
Patrick Laloyaux; S. Frolov; B. Ménétrier; Massimo Bonavita
Implicit and explicit cross-correlations in coupled data assimilation
08/2018
18552-implicit-and-explicit-cross-correlations-coupled-data-assimilation.pdf
826
D. Salisbury; Kristian Mogensen; G. Balsamo
Use of in situ observations to verify the diurnal cycle of sea surface temperature in ECMWF coupled model forecasts
11/2018
18745-use-situ-observations-verify-diurnal-cycle-sea-surface-temperature-ecmwf-coupled-model.pdf
825
X. Yepes-Arbos; M. Acosta; G. van den Oord; Glenn Carver
Computational aspects and performance evaluation of the IFS-XIOS integration
09/2018
18597-computational-aspects-and-performance-evaluation-ifs-xios-integration.pdf
824
T.G. Shepherd; I. Polichtchouk; Robin Hogan; A.J. Simmons
Report on Stratosphere Task Force
06/2018
18259-report-stratosphere-task-force.pdf
823
Hao Zuo; Magdalena Alonso-Balmaseda; K. Mogensen; Steffen Tietsche
OCEAN5: The ECMWF Ocean Reanalysis System and its Real-Time analysis component
08/2018
18519-ocean5-ecmwf-ocean-renalysis-system-and-its-real-time-analysis-component.pdf
821
C. Largeron; H.L. Cloke; A. Verhoef; A. Martinez-de-la-Torre; Anna Mueller-Quintino
Impact of the representation of the infiltration on the river flow during intense rainfall events in Jules
2018
18245-impact-representation-infiltration-river-flow-during-intense-rainfall-events-jules.pdf
820
P. Dahlgren
Evaluation and diagnostics of the CERA-20C climate reanalysis ensemble
2018
17932-evaluation-and-diagnostics-cera-20c-climate-reanalysis-ensemble.pdf
818
David Richardson; Tim Hewson
Use and verification of ECMWF products in Member and Co-operating States (2017)
2018
17931-use-and-verification-ecmwf-products-member-and-co-operating-states-2017.pdf
813
Peter Janssen
Shallow-water version of the Freak Wave Warning System
2018
18063-shallow-water-version-freak-wave-warning-system.pdf