Technical Memoranda

905
David Duncan; Niels Bormann; Alan Geer; Peter Weston
Superobbing and Finer Thinning for All-sky Humidity Sounder Assimilation
03/2023
905-hsounder.pdf
904
Tiago Quintino; Umberto Modigliani; Florian Pappenberger; Sylvie Lamy-Thepaut; Simon Smart; James Hawkes; Iain Russell; Laurent Gougeon; Cristiano Zanna; Baudouin Raoult
Software Strategy and Roadmap 2023-2027
01/2023
904-software-roadmap-final.pdf
903
Philippe Lopez; Marco Matricardi
Validation of IFS+RTTOV/MFASIS0.64-μm reflectances against observations from GOES-16, GOES-17, MSG-4 and Himawari-8
09/2022
20472-validation-ifsrttovmfasis064-mm-reflectances-against-observations-goes-16-goes-17-msg-4-and.pdf
902
Thomas Haiden; Martin Janousek; Frédéric Vitart; Zied Ben-Bouallegue; Laura Ferranti; Fernando Prates; David Richardson
Evaluation of ECMWF forecasts, including the 2021 upgrade
09/2022
20469-evaluation-ecmwf-forecasts-including-2021-upgrade.pdf
901
Stephan Hemri; Tim Hewson; Estibaliz Gascon; Jan Rajczak; Jonas Bhend; Christoph Spririg; Lionel Moret; Mark Liniger
How do ecPoint precipitation forecasts compare with postprocessed multi-model ensemble predictions over Switzerland?
08/2022
20459-how-do-ecpoint-precipitation-forecasts-compare-postprocessed-multi-model-ensemble-predictions.pdf
900
Eugen Betke; Tiago Quintino; Simon Smart; Tomas Wilhelmsson
Impact of GRIB compression on weather forecast data and data-handling applications
08/2022
20461-impact-grib-compression-weather-forecast-data-and-data-handling-applications.pdf
899
Chris Burrows; Pierre Dussarrat
Preparing for the exploitation of MTG-S IRS in NWP using FY4-A GIIRS observations
06/2022
20396-preparing-exploitation-mtg-s-irs-nwp-using-fy4-giirs-obs.pdf
898
Michael Mayer; Magdalena Alonso-Balmaseda; Stephanie Johnson; Linus Magnusson; Christopher Roberts; Hao Zuo
Outcomes from UGROW-IO: Forecast errors in the Eastern Indian Ocean across lead times
06/2022
20401-outcomes-ugrow-io-forecast-errors-eastern-indian-ocean-across-lead-times.pdf
896
Zied Ben-Bouallegue; Fenwick Cooper; Matthew Chantry; Peter Düben; Peter Bechtold; Irina Sandu
Statistical modelling of 2m temperature and 10m wind speed forecast errors
04/2022
20342-statistical-modelling-2m-temperature-and-10m-wind-speed-forecast-errors.pdf
895
Chloe Brimicombe; Tiago Quintino; Simon Smart; Claudia Di Napoli; Robin Hogan; Hannah Cloke; Florian Pappenberger
Calculating the Cosine of the Solar Zenith Angle for Thermal Comfort Indices
04/2022
20336-calculating-cosine-solar-zenith-angle-thermal-comfort-indices.pdf
894
Alan Geer; Katrin Lonitz; David Duncan; Niels Bormann
Improved surface treatment for all-sky microwave observations
04/2022
20337-improved-surface-treatment-all-sky-microwave-observations.pdf
893
Takafumi Kanehama; Irina Sandu; Anton Beljaars; Annelize van Niekerk; Nils Wedi; Souhail Boussetta; Simon Lang; Stephanie Johnson; Linus Magnusson
Evaluation and optimizaton of orographic drag in the IFS
03/2022
20333-evaluation-and-optimizaton-orographic-drag-ifs.pdf
892
Philippe Lopez; Marco Matricardi; Mark Fielding
Validation of IFS+RTTOV/MFASIS solar reflectances against GOES-16 ABI obs
03/2022
20332-validation-ifsrttovmfasis-solar-reflectances-against-goes-16-abi-obs.pdf
891
Linus Magnusson; Magdalena Alonso-Balmaseda; Mohamed Dahoui; Richard Forbes; Thomas Haiden; David Lavers; Irina Sandu; Steffen Tietsche
Summary of the UGROW subproject on tropospheric temperature bias during JJA over the Northern Hemisphere
03/2022
20356-summary-ugrow-subproject-tropospheric-temperature-bias-during-jja-over-northern-hemisphere.pdf
890
Peter Janssen
Notes on shallow water extension of Miles Theory
02/2022
20286-notes-shallow-water-extension-miles-theory.pdf
889
Frédéric Vitart; Rebecca Emerton; Mark Rodwell; Magdalena Alonso-Balmaseda; Thomas Haiden; Stephanie Johnson; L. Magnusson; Christopher Roberts; Irina Sandu
Investigating biases in the representation of the Pacific sub-tropical jet stream and associated teleconnections (a UGROW sub-project)
01/2022
20281-investigating-biases-representation-pacific-sub-tropical-jet-stream-and-associated.pdf
888
Linus Magnusson; Sharan Majumdar; Rebecca Emerton; David Richardson; Magdalena Alonso-Balmaseda; C. Baugh; Peter Bechtold; Jean-Raymond Bidlot; Antonino Bonanni; Massimo Bonavita; Niels Bormann; Andy Brown; Philip Browne; Hilda Carr; Mohamed Dahoui; Giovanna De Chiara; Michail Diamantakis; David Duncan; Stephen English; Richard Forbes; Alan Geer; Thomas Haiden; Sean Healy; Tim Hewson; B. Ingleby; Martin Janousek; Christian Kuehnlein; Simon Lang; Sarah-Jane Lock; Tony McNally; Kristian Mogensen; Florian Pappenberger; Inna Polichtchouk; Fernando Prates; C. Prudhomme; Florence Rabier; Patricia de Rosnay; Tiago Quintino; Michael Rennie
Tropical cyclone activities at ECMWF
10/2021
20228-tropical-cyclone-activities-ecmwf.pdf
887
Ryan Williams; Robin Hogan; Inna Polichtchouk; Michaela Hegglin; Tim Stockdale; Johannes Flemming
Evaluating the impact of prognostic ozone in IFS NWP forecasts
10/2021
20190-evaluating-impact-prognostic-ozone-ifs-nwp-forecasts.pdf
886
Niels Bormann
Investigating the use of Lambertian reflection in the assimilation of surface-sensitive microwave sounding radiances over snow and sea-ice
09/2021
20180-investigating-use-lambertian-reflection-assimilation-surface-sensitive-microwave-sounding.pdf
885
Tim Hewson
Use and Verification of ECMWF products in Member and Co-operating States
09/2021
20179-use-and-verification-ecmwf-products-member-and-co-operating-states.pdf
884
Thomas Haiden; Martin Janousek; Frédéric Vitart; Zied Ben-Bouallegue; Laura Ferranti; Fernando Prates
Evaluation of ECMWF forecasts, including the 2021 upgrade
09/2021
20142-evaluation-ecmwf-forecasts-including-2021-upgrade.pdf
882
Peter Janssen; Jean-Raymond Bidlot
On the consequences of nonlinearity and gravity-capillary waves on wind-wave interaction
02/2021
19943-consequences-nonlinearity-and-gravity-capillary-waves-wind-wave-interaction.pdf
881
Adrian Simmons; Hans Hersbach; Joaquin Munoz-Sabater; Julien Nicolas; Freja Vamborg; Paul Berrisford; Patricia de Rosnay; Kate Willett; Jack Woollen
Low frequency variability and trends in surface air temperature and humidity from ERA5 and other datasets
02/2021
19911-low-frequency-variability-and-trends-surface-air-temperature-and-humidity-era5-and-other.pdf
880
Thomas Haiden; Martin Janousek; Frédéric Vitart; Zied Ben-Bouallegue; Laura Ferranti; Crtistina Prates; David Richardson
Evaluation of ECMWF forecasts, including the 2020 upgrade
01/2021
19879-evaluation-ecmwf-forecasts-including-2020-upgrade.pdf