Technical Memoranda

771
N. Zagar; Roberto Buizza; J. Tribbia
A three-dimensional multivariate modal analysis of atmospheric predictability with application to the ECMWF ensemble
2015
15309-three-dimensional-multivariate-modal-analysis-atmospheric-predictability-application-ecmwf.pdf
769
Mark Rodwell; Laura Ferranti; L. Magnusson
Diagnosis of northern hemispheric regime behaviour during winter 2013/14
2015
15305-diagnosis-northern-hemispheric-regime-behaviour-during-winter-201314.pdf
768
Michail Diamantakis; L. Magnusson
Numerical sensitivity of the ECMWF model to Semi-Lagrangian departure point iterations
2015
15302-numerical-sensitivity-ecmwf-model-semi-lagrangian-departure-point-iterations.pdf
767
Qifeng Lu; Heather Lawrence; Niels Bormann; Stephen English; Katie Lean; Nigel Atkinson; W. Bell; F. Carminati
An evaluation of FY-3C satellite data quality at ECMWF and the Met Office
2015
14692-evaluation-fy-3c-satellite-data-quality-ecmwf-and-met-office.pdf
766
Alan Geer
Significance of changes in medium-range forecast scores
2015
15287-significance-changes-medium-range-forecast-scores.pdf
765
Thomas Haiden; Martin Janousek; Peter Bauer
Evaluation of ECMWF forecasts, including 2014-2015 upgrades
2015
15275-evaluation-ecmwf-forecasts-including-2014-2015-upgrades.pdf
765
Thomas Haiden; Martin Janousek; Peter Bauer; Jean-Raymond Bidlot; Mohamed Dahoui; Laura Ferranti; F. Prates; David Richardson; Frédéric Vitart
Evaluation of ECMWF forecasts, including 2014-2015 upgrades
2015
14691-evaluation-ecmwf-forecasts-including-2014-2015-upgrades.pdf
764
M. Herman; Z. Fuchs; D. Raymond; Peter Bechtold
Convectively coupled Kelvin Waves: From linear theory to global models
2015
15273-convectively-coupled-kelvin-waves-linear-theory-global-models.pdf
763
Irina Sandu; Peter Bechtold; Anton Beljaars; Alessio Bozzo; Felix Pithan; T.G. Shepherd; Ayrton Zadra
Impacts of parameterized orographic drag on the Northern Hemisphere winter circulation
2015
14694-impacts-parameterized-orographic-drag-northern-hemisphere-winter-circulation.pdf
762
Emanuel Dutra; Irina Sandu; Gianpaolo Balsamo; Anton Beljaars; Etienne Vignon; E. Brun; Helene Freville
Understanding the ECMWF winter surface temperature biases over Antarctica
2015
15262-understanding-ecmwf-winter-surface-temperature-biases-over-antarctica.pdf
761
D.A. MacLeod; Hannah Cloke; Florian Pappenberger; Antje Weisheimer
Improved seasonal prediction of the hot summer of 2003 over Europe through better representation of uncertainty in the land
08/2015
10897-improved-seasonal-prediction-hot-summer-2003-over-europe-through-better-representation.pdf
760
Nils Wedi; Peter Bauer; Willem Deconinck; Michail Diamantakis; M. Hamrud; Christian Kuehnlein; S. Malardel; Kristian Mogensen; G. Mozdzynski; Piotr Smolarkiewicz
The modelling infrastructure of the Integrated Forecasting System: Recent advances and future challenges
2015
15259-modelling-infrastructure-integrated-forecasting-system-recent-advances-and-future-challenges.pdf
759
Mark Rodwell; Laura Ferranti; Thomas Haiden; L. Magnusson
New developments in the diagnosis and verification of high-impact weather forecasts
2015
15255-new-developments-diagnosis-and-verification-high-impact-weather-forecasts.pdf
758
Robin Hogan; S. Hirahara
Effect of solar zenith angle specification on mean shortwave fluxes and stratospheric temperatures
08/2015
9930-effect-solar-zenith-angle-specification-mean-shortwave-fluxes-and-stratospheric-temperatures.pdf
757
S-H. Lee; Kirsti Salonen; Niels Bormann
Assessment of AMV's from COMS in the ECMWF system
07/2015
10690-assessment-amvs-coms-ecmwf-system.pdf
756
Niels Bormann; Massimo Bonavita; Rossana Dragani; Reime Eresmaa; Marco Matricardi; A. McNally
Enhancing the impact of IASI observations through an updated observation error covariance matrix
07/2015
8292-enhancing-impact-iasi-observations-through-updated-observation-error-covariance-matrix.pdf
755
Peter Janssen
Notes on the maximum wave height distribution
06/2015
10185-notes-maximum-wave-height-distribution.pdf
754
Roberto Buizza; Martin Leutbecher
The Forecast Skill Horizon
06/2015
8450-forecast-skill-horizon.pdf
753
Cristina Lupu; Carla Cardinali; A. McNally
Adjoint-based forecast sensitivity applied to observation error variances tuning
06/2015
10864-adjoint-based-forecast-sensitivity-applied-observation-error-variances-tuning.pdf
752
N. Semane; Peter Bechtold
Convection and waves on Small Earth and Deep Atmosphere
03/2015
12174-convection-and-waves-small-earth-and-deep-atmosphere.pdf
751
W. Shi; N. Schaller; D. MacLeod; T.N. Palmer; Antje Weisheimer
Impact of hindcast length on estimates of seasonal climate predictability
03/2015
12198-impact-hindcast-length-estimates-seasonal-climate-predictability.pdf
750
Francesca Di Giuseppe; A.M. Tompkins
A parameterization of cloud overlap as a function of wind shear and its impact in ECMWF forecast
06/2015
9032-parameterization-cloud-overlap-function-wind-shear-and-its-impact-ecmwf-forecast.pdf
749
Cristina Lupu; Alan Geer; Niels Bormann
Revision of the microwave coefficient files in the IFS
03/2015
10861-revision-microwave-coefficient-files-ifs.pdf
748
Cristina Lupu; Alan Geer
Operational implementation of RTTOV-11 in the IFS
03/2015
10860-operational-implementation-rttov-11-ifs.pdf