Technical Memoranda

853
Thomas Haiden; Martin Janousek; Frédéric Vitart; Laura Ferranti; Fernando Prates
Evaluation of ECMWF forecasts, including the 2019 upgrade
11/2019
19277-evaluation-ecmwf-forecasts-including-2019-upgrade.pdf
852
orcid.org/0000-0002-4223-5831 Groenemeijer; orcid.org/0000-0002-4983-0449 Púcik; Ivan Tsonevsky; Peter Bechtold
An Overview of Convective Available Potential Energy and Convective Inhibition provided by NWP models for operational forecasting
11/2019
19278-overview-convective-available-potential-energy-and-convective-inhibition-provided-nwp-models.pdf
851
Linus Magnusson
ECMWF Severe Event Catalogue for Evaluation of Multi-scale Prediction of Extreme Weather
10/2019
81119-ecmwf-severe-event-catalogue-evaluation-multi-scale-prediction-extreme-weather.pdf
850
Cristina Prates; Erik Andersson; Thomas Haiden
WIGOS Data Quality Monitoring System at ECMWF
07/2019
81084-wigos-data-quality-monitoring-system-ecmwf.pdf
849
S. Malardel; M. Diamantakis; Agusti Panareda; Johannes Flemming
Dry mass versus total mass conservation in the IFS
07/2019
19114-dry-mass-versus-total-mass-conservation-ifs.pdf
848
J. Barré; Sebastien Massart; Melanie Ades; Luke Jones; Richard Engelen
Emission optimisations first attempt based on Ensemble of DA for atmospheric composition
06/2019
19085-emission-optimisations-first-attempt-based-ensemble-da-atmospheric-composition.pdf
847
Inna Polichtchouk; Tim Stockdale; Peter Bechtold; Michail Diamantakis; Sylvie Malardel; Irina Sandu; Filip Vána; Nils Wedi
Control on stratospheric temperature in IFS: resolution and vertical advection
06/2019
19084-control-stratospheric-temperature-ifs-resolution-and-vertical-advection.pdf
845
Heather Lawrence; Jacky Goddard; Irina Sandu; Niels Bormann; Peter Bauer; Linus Magnusson
An Assessment of the use of observations in the Arctic at ECMWF
04/2019
80977-assessment-use-observations-arctic-ecmwf.pdf
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
80975-towards-improved-sea-ice-initialization-and-forecasting-ifs.pdf
843
Joaquin 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
80972-assimilation-smos-brightness-temperatures-ecmwf-ifs.pdf
841
Frédéric Vitart; Gianpaolo Balsamo; Jean Bidlot; Simon Lang; Ivan Tsonevsky; David Richardson; Magdalena Alonso Balmaseda
Use of ERA5 to Initialize Ensemble Re-forecasts
02/2019
80956-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
80974-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; Linus 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
80921-seas5-and-future-evolution-long-range-forecast-system.pdf
834
T. Haiden; M. Dahoui; B. Ingleby; P. de Rosnay; Cristina Prates; Ersagun Kuscu; Tim Hewson; L. Isaksen; David Richardson; Hao Zuo; Luke Jones
Use of in situ surface observations at ECMWF
11/2018
80920-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 Bidlot; R. Buizza; L. Ferranti; F. Prates; Frédéric Vitart
Evaluation of ECMWF forecasts, including the 2018 upgrade
10/2018
80918-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
80866-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; Linus 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
80865-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