Niels Bormann

Principal Scientist

Research, Earth System Assimilation, Microwave Radiance Observations

Summary:

Niels Bormann is a Principal Scientist in the ECMWF Research Department, leading a team responsible for the exploitation of satellite observations from microwave radiances and Atmospheric Motion Vectors (AMVs) as well as the general processing of observations for assimilation.

Professional interests:

Use of satellite data to specify initial conditions for operational global Numerical Weather forecasts, in particular:

Evaluation of new satellite data in NWP for assimilation and calibration/validation; detection and diagnosis of anomalies.
Extended and improved use of satellite observations in NWP, with a focus on microwave sounders and AMVs.
Estimating and accounting for random and systematic uncertainties involved in the assimilation of satellite data.
Feedback to space agencies and advice for planning of future satellite missions.

Career background:

2016-present: Team Leader Microwave Radiances and AMVs, ECMWF
2011-2015: Team Leader Microwave Sounders and AMVs, ECMWF
2011-present: Principal Scientist working on the assimilation of MW and IR sounders, ECMWF
2006-2011: Senior Scientist working on the assimilation of MW and IR radiances, ECMWF
2003-2006: Research Consultant working on the assimilation of IR limb radiances, ECMWF
2000-2002: EUMETSAT Fellow working on the assimilation of AMVs, ECMWF
1997-2000: PhD (Geophysics), Victoria University of Wellington, New Zealand, in collaboration with the New Zealand National Institute for Water and Atmospheric Research (NIWA)

External recognitions

CGMS International TOVS Working Group Co-chair (2012-2018)
EUMETSAT Science Working Group delegate (2006-today)
EUMETSAT NWP SAF Steering Group (2016-today)
ESA/EUMETSAT EPS-SG MWS Science Advisory Group (2015-today)
EUMETSAT MTG-IRS Science Team (2010-2013)
ESA PREMIER Mission Assessment Group (2007-2008)

Dr Vilho Väisälä Award for the Development and Implementation of the Instruments and Methods of Observation of WMO (2012)
Jim Ansell Geophysics Award of the Geophysics Society of New Zealand (1999)

2025
- Linus Magnusson, Sharanya J. Majumdar, Mohamed L. Dahoui, Niels Bormann, Massimo Bonavita, Philip A. Browne, Andy R. Brown, Giovanna De Chiara, David I. Duncan, Stephen English, Alan J. Geer, Sean Healy, Bruce Ingleby, Anthony P. McNally, Florian Pappenberger, Fernando Prates, Florence Rabier, Patricia de Rosnay, Michael P. Rennie, Francis Warrick (January 2025) The role of observations in ECMWF tropical cyclone initialisation and forecasting, Quarterly Journal of the Royal Meteorological Society. DOI: 10.1002/qj.4924
- Katie Lean, Niels Bormann, Sean Healy, Stephen English, Dirk Schüttemeyer, Matthias Drusch (February 2025) Assessing forecast benefits of future constellations of microwave sounders on small satellites using an ensemble of data assimilations, Quarterly Journal of the Royal Meteorological Society. DOI: 10.1002/qj.4939
2024
- (December 2024) Forecast impact assessment of a potential ATMS instrument in the early-morning orbit using the EDA method, Technical Memoranda n. 925. DOI: 10.21957/59eb3a9b44
- (December 2024) An update on AI–DOP: skilful weather forecasts produced directly from observations, ECMWF Newsletter n. 182, pp. 15-18. DOI: 10.21957/tmi6y913dc
- (April 2024) Methods for assessing the impact of current and future components of the global observing system, ECMWF Technical Memoranda n. 916. DOI: 10.21957/2f240fe55f
- (May 2024) Vicarious calibration monitoring for MWI and ICI using NWP fields, Eumetsat Contract Report. DOI: 10.21957/7c2d18d2e1
- (May 2024) On the usefulness of additional cloud and tracking information for the assimilation of AMVs, EUMETSAT/ECMWF Fellowship Programme Research Report n. 63. DOI: 10.21957/1c5cfdf425
2023
- Katie Lean, Niels Bormann (March 2023) Using Model Cloud Information to Reassign Low-Level Atmospheric Motion Vectors in the ECMWF Assimilation System, Journal of Applied Meteorology and Climatology. DOI: 10.1175/jamc-d-22-0094.1
- (April 2023) Microwave Imagers in the ECMWF-IFS: Adding further observations and improving convective anvils in the observation operator, EUMETSAT/ECMWF Fellowship Programme Research Report n. RR61. DOI: 10.21957/8542a37c46
- Katie Lean, Niels Bormann, Sean Healy (May 2023) Task 1.1 Evaluation of initial future EPS-Sterna constellations with 50 and 183 GHz, ECMWF. DOI: 10.21957/0A695FCC39
- (December 2023) Assimilating FY-3E MWHS-2 obs, and assessing all-sky humidity sounder thinning scales, EUMETSAT/ECMWF Fellowship Programme Research Report n. RR62. DOI: 10.21957/f42a9d9542
2022
- Katie Lean, Niels Bormann, Sean Healy (February 2022) WP-1000 Review of EDA approach and recommendations for small satellite configurations, ESA contract 4000130590/20/NL/IA. DOI: 10.21957/osvhislk
- Katrin Lonitz, Alan Geer, Niels Bormann (March 2022) Towards assimilating surface sensitive microwave channels over land, EUMETSAT/ECMWF Fellowship Programme Research Report n. 58. DOI: 10.21957/gdwqzfns
- Alan Geer, Katrin Lonitz, David I. Duncan, Niels Bormann (April 2022) Improved surface treatment for all-sky microwave observations, ECMWF Technical Memoranda n. 894. DOI: 10.21957/zi7q6hau
- Niels Bormann (July 2022) Accounting for Lambertian reflection in the assimilation of microwave sounding radiances over snow and sea‐ice, Quarterly Journal of the Royal Meteorological Society. DOI: 10.1002/qj.4337
- Katrin Lonitz, Alan Geer, David I. Duncan, Niels Bormann (April 2022) Developing an all-surface capability for all‑sky microwave radiances, ECMWF Newsletter, issue 171, pp. 23-27. DOI: 10.21957/ag94h613vk
- (November 2022) Final Report: Study to assess earth observation with small satellites and their prospects for future global numerical weather prediction, ESA Contract Report. DOI: 10.21957/kp7z1sn1n
- (February 2022) WP-3000 Developing a flexible system to simulate and assimilate small satellite data, ESA Contract Report. DOI: 10.21957/kjmxyh9xy
- David I. Duncan, Niels Bormann, Alan Geer (August 2022) All-sky Assimilation of AMSU-A Window Channels, EUMETSAT/ECMWF Fellowship Programme Research Report n. 59. DOI: 10.21957/daefm16p8
- Patricia de Rosnay, Philip Browne, Eric de Boisseson, David Fairbairn, Yoichi Hirahara, Kenta Ochi, Dinand Schepers, Peter Weston, Hao Zuo, Magdalena A. Balmaseda, Gianpaolo Balsamo, Massimo Bonavita, Niels Bormann, Andy Brown, Marcin Chrust, Mohamed Dahoui, Giovanna De Chiara, Stephen English, Alan Geer, Sean Healy, Hans Hersbach, Patrick Laloyaux, Linus Magnusson, Sebastien Massart, Anthony McNally, Florian Pappenberger, Florence Rabier (July 2022) Coupled data assimilation at ECMWF: current status, challenges and future developments, Quarterly Journal of the Royal Meteorological Society. DOI: 10.1002/qj.4330
- David I. Duncan, Niels Bormann, Alan J. Geer, Peter Weston (May 2022) Assimilation of AMSU-A in All-Sky Conditions, Monthly Weather Review. DOI: 10.1175/mwr-d-21-0273.1
- (February 2022) WP-2000 Calibration of EDA spread and adaptation of the observation error model, ESA Contract Report. DOI: 10.21957/1auh0nztg
- Francis Warrick, Niels Bormann (November 2022) Prospects for improving AMV spatial coverage between geostationary and polar AMVs: LeoGeo and Dual-Sentinel, EUMETSAT/ECMWF Fellowship Programme Research Report n. 60. DOI: 10.21957/uavyvxbu
2021
- Linus Magnusson, Sharanya Majumdar, Rebecca Emerton, David Richardson, Magdalena A. Balmaseda, Calum Baugh, Peter Bechtold, Jean Bidlot, Antonino Bonanni, Massimo Bonavita, Niels Bormann, Andy Brown, Philip Browne, Hilda Carr, Mohamed Dahoui, Giovanna De Chiara, Michail Diamantakis, David I. Duncan, Stephen English, Richard Forbes, Alan Geer, Thomas Haiden, Sean Healy, Timothy Hewson, Bruce Ingleby, Martin Janousek, Christian Kühnlein, Simon Lang, Sarah-Jane Lock, Tony McNally, Kristian S. Mogensen, Florian Pappenberger, Inna Polichtchouk, Fernando Prates, Christel Prudhomme, Florence Rabier, Patricia de Rosnay, Tiago Quintino, Michael Rennie (October 2021) Tropical cyclone activities at ECMWF, ECMWF Technical Memoranda n. 888. DOI: 10.21957/zzxzzygwv
- irina sandu, Gabriele Arduini, Jonathan Day, Linus Magnusson, Heather Lawrence, Niels Bormann, Peter Bauer, Sarah Keeley, Gianpaolo Balsamo, Thomas Haiden (July 2021) How APPLICATE contributed to ECMWF core activities, ECMWF Newsletter, issue 168, pp. 24-31. DOI: 10.21957/ir5fk44das
- David I. Duncan, Niels Bormann, Elías V. Hólm (October 2021) On the addition of microwave sounders and numerical weather prediction skill, Quarterly Journal of the Royal Meteorological Society n. 740, pp. 3703-3718. DOI: 10.1002/qj.4149
- Niels Bormann (September 2021) Investigating the use of Lambertian reflection in the assimilation of surface-sensitive microwave sounding radiances over snow and sea-ice, ECMWF Technical Memoranda n. 886. DOI: 10.21957/hzcsrx8tt
- Peter Lean, E. V. Hólm, M. Bonavita, N. Bormann, A. P. McNally, H. Järvinen (January 2021) Continuous data assimilation for global numerical weather prediction, Quarterly Journal of the Royal Meteorological Society. DOI: 10.1002/qj.3917
- Sebastien Massart, Niels Bormann, Massimo Bonavita, Cristina Lupu (September 2021) Multi-sensor analyses of the skin temperature for the assimilation of satellite radiances in the European Centre for Medium-Range Weather Forecasts (ECMWF) Integrated Forecasting System (IFS, cycle 47R1), Geoscientific Model Development. DOI: 10.5194/gmd-14-5467-2021
- Niels Bormann, David Duncan, Stephen English, Sean Healy, Katrin Lonitz, Keyi Chen, Heather Lawrence, Qifeng Lu (August 2021) Growing Operational Use of FY-3 Data in the ECMWF System, Advances in Atmospheric Sciences. DOI: 10.1007/s00376-020-0207-3
- irina sandu, François Massonnet, Guillian van Achter, Juan C. Acosta Navarro, Gabriele Arduini, Peter Bauer, Ed Blockley, Niels Bormann, Matthieu Chevallier, Jonathan Day, Mohamed Dahoui, Thierry Fichefet, Daniela Flocco, Thomas Jung, Ed Hawkins, Stephane Laroche, Heather Lawrence, Jørn Kristiansen, Eduardo Moreno-Chamarro, Pablo Ortega, Emmanuel Poan, Leandro Ponsoni, Roger Randriamampianina (October 2021) The potential of numerical prediction systems to support the design of Arctic observing systems: Insights from the APPLICATE and YOPP projects, Quarterly Journal of the Royal Meteorological Society. DOI: 10.1002/qj.4182
- Katie Lean, Niels Bormann (June 2021) Using model cloud information to reassign low level AMVs for NWP, EUMETSAT/ECMWF Fellowship Programme Research Report n. 56. DOI: 10.21957/6vqwj6n4d
- David I. Duncan, Niels Bormann, Alan Geer, Peter Weston (October 2021) Assimilation of AMSU-A in All-sky Conditions, EUMETSAT/ECMWF Fellowship Programme Research Report. DOI: 10.21957/b3qsdrf2l
2020
- Stuart Newman, Fabien Carminati, Heather Lawrence, Niels Bormann, Kirsti Salonen, William Bell (May 2020) Assessment of New Satellite Missions within the Framework of Numerical Weather Prediction, Remote Sensing. DOI: 10.3390/rs12101580
- Mohamed Dahoui, Niels Bormann, L. Isaksen, Tony McNally (January 2020) Recent developments in the automatic checking of Earth system observations, ECMWF Newsletter, issue 162, pp. 27-31. DOI: 10.21957/9tys2md61a
- Katie Lean, Niels Bormann (May 2020) Replacement of GOES-15 with GOES-17 AMVs, EUMETSAT/ECMWF Fellowship Programme Research Report n. 54. DOI: 10.21957/adwfue2ph
- Sebastien Massart, Niels Bormann, Massimo Bonavita, Cristina Lupu (August 2020) Skin Temperature Analysis for the Assimilation of Clear-Sky Satellite Radiances, ECMWF Technical Memoranda n. 870. DOI: 10.21957/goe0ads8z
- David I. Duncan, Niels Bormann (September 2020) On the Addition of Microwave Sounders and NWP Skill, Including Assessment of FY-3D Sounders, EUMETSAT/ECMWF Fellowship Programme Research Report n. 55. DOI: 10.21957/iimhohmqt
2019
- Heather Lawrence, Niels Bormann, Irina Sandu, Jonathan Day, Jacky Farnan, Peter Bauer (October 2019) Use and impact of Arctic observations in the ECMWF Numerical Weather Prediction system, Quarterly Journal of the Royal Meteorological Society. DOI: 10.1002/qj.3628
- Jonathan Day, Irina Sandu, Linus Magnusson, Mark J. Rodwell, Heather Lawrence, Niels Bormann, Thomas Jung (October 2019) Increased Arctic influence on the midlatitude flow during Scandinavian Blocking episodes, Quarterly Journal of the Royal Meteorological Society. DOI: 10.1002/qj.3673
- Niels Bormann, Heather Lawrence, Jacqueline Farnan (January 2019) Global observing system experiments in the ECMWF assimilation system, ECMWF Technical Memoranda n. 839. DOI: 10.21957/sr184iyz
- Katie Lean, Niels Bormann (January 2019) Moving to GOES-16: a new generation of GOES AMVs, EUMETSAT/ECMWF Fellowship Programme Research Report n. 49. DOI: 10.21957/2ryh9v5no
- Peter Lean, Massimo Bonavita, Elias Hólm, Niels Bormann, Tony McNally (January 2019) Continuous data assimilation for the IFS, ECMWF Newsletter, issue 158, pp. 21-26. DOI: 10.21957/9pl5fc37it
- Heather Lawrence, Jacky Goddard, irina sandu, Niels Bormann, Peter Bauer, Linus Magnusson (April 2019) An Assessment of the use of observations in the Arctic at ECMWF, ECMWF Technical Memoranda n. 845. DOI: 10.21957/exlwb4o04
- Peter Weston, Alan Geer, Niels Bormann (September 2019) Investigations into the assimilation of AMSU-A in the presence of cloud and precipitation, EUMETSAT/ECMWF Fellowship Programme Research Report. DOI: 10.21957/ewahn9ce
- Alan Geer, Niels Bormann, Katrin Lonitz, Peter Weston, Richard Forbes, Stephen English (November 2019) Recent progress in all‑sky radiance assimilation, ECMWF Newsletter, issue 161, pp. 20-25. DOI: 10.21957/mb31c8ag74
2018
- (May 2018) On the representation error in data assimilation, Quarterly Journal of the Royal Meteorological Society. DOI: 10.1002/qj.3130
- Roger Saunders, James Hocking, Emma Turner, Peter Rayer, David Rundle, Pascal Brunel, Jerome Vidot, Pascale Rocquet, Marco Matricardi, Alan Geer, Niels Bormann, Cristina Lupu (March 2018) An update on the RTTOV fast radiative transfer model (currently at version 12). DOI: 10.5194/gmd-2018-64
- Heather Lawrence, Niels Bormann, Alan J. Geer, Qifeng Lu, Stephen J. English (June 2018) Evaluation and Assimilation of the Microwave Sounder MWHS-2 Onboard FY-3C in the ECMWF Numerical Weather Prediction System, IEEE Transactions on Geoscience and Remote Sensing. DOI: 10.1109/tgrs.2018.2798292
- Katie Lean, Niels Bormann (July 2018) Indian Ocean winds: changes and challenges, ECMWF Newsletter, issue 156, pp. 30-36. DOI: 10.21957/73kl5120nb
2017
- (May 2017) Slant path radiative transfer for the assimilation of sounder radiances, Tellus A: Dynamic Meteorology and Oceanography. DOI: 10.1080%2F16000870.2016.1272779
- (May 2017) The growing impact of satellite observations sensitive to humidity, cloud and precipitation, Quart. J. Roy. Meteor. Soc.. DOI: 10.1002/qj.3172
- Niels Bormann (May 2017) Assimilating satellite data along a slanted path, ECMWF newsletter, issue 153, pp. 32-36. DOI: 10.21957/l384nb
- Roberto Buizza, Peter Bechtold, Massimo Bonavita, Niels Bormann, Alessio Bozzo, Thomas Haiden, Robin Hogan, Elias Hólm, Gabor Radnoti, David Richardson, Michael Sleigh (May 2017) IFS Cycle 43r3 brings model and assimilation updates, ECMWF newsletter, issue 152, pp. 18-22. DOI: 10.21957/76t4e1
- Alan Geer, Maike Ahlgrimm, Peter Bechtold, Massimo Bonavita, Niels Bormann, Stephen English, Mark Fielding, Richard Forbes, Robin Hogan, Elias Hólm, Marta Janiskova, Katrin Lonitz, Philippe Lopez, Marco Matricardi, irina sandu, P. Weston (May 2017) Assimilating observations sensitive to cloud and precipitation, ECMWF Technical Memoranda n. 815. DOI: 10.21957/sz7cr1dym
- Niels Bormann, Cristina Lupu, Alan Geer, Heather Lawrence, P. Weston, Stephen English (May 2017) Assessment of the forecast impact of suface-sensitive microwave radiances over land and sea-ice, ECMWF Technical Memoranda n. 804. DOI: 10.21957/qyh34roht
- Heather Lawrence, F. Carminati, W. Bell, Niels Bormann, S. Newman, Nigel Atkinson, Alan Geer, S. Migliorini, Qifeng Lu, K. Chen (May 2017) An evaluation of FY-3C MWRI and Assessment of the long-term quality of FY-3C MWHS-2 at ECMWF and the Met Office, ECMWF Technical Memoranda n. 798. DOI: 10.21957/lhuph6fb3
2016
- K. Chen, Niels Bormann, Stephen English, J. Zhu (May 2016) Assimilation of MWHS data over Land, ECMWF Technical Memorandum n. 789. DOI: 10.21957/j8z5kktte
- Niels Bormann, Massimo Bonavita, Rossana Dragani, Reima Eresmaa, Marco Matricardi, Anthony McNally (April 2016) Enhancing the impact of IASI observations through an updated observation‐error covariance matrix, Quarterly Journal of the Royal Meteorological Society. DOI: 10.1002/qj.2774
- Cristina Lupu, Alan Geer, Niels Bormann, Stephen English (May 2016) An evaluation of radiative transfer modelling errors in AMSU-A data, ECMWF Technical Memoranda n. 770. DOI: 10.21957/2z8x0imgl
- Han W., Niels Bormann (May 2016) Constrained adaptive bias correction for satellite radiance assimilation in the ECMWF 4D-Var system, ECMWF Technical Memorandum n. 783. DOI: 10.21957/rex0omex
- Niels Bormann (May 2016) Slant path radiative transfer for the assimilation of sounder radiances, ECMWF Technical Memorandum n. 782. DOI: 10.21957/g7rkj22w
2015
- (May 2015) Characterising AMV height assignment error by comparing best-fit pressure statistics from the Met Office and ECMWF data assimilation systems, J. Appl. Met. & Climat.. DOI: 10.1175/JAMC-D-14-0025.1
- Keyi Chen, Stephen English, Niels Bormann, Jiang Zhu (October 2015) Assessment of FY-3A and FY-3B MWHS Observations, Weather and Forecasting. DOI: 10.1175/waf-d-15-0025.1
- Cristina Lupu, Alan Geer, Niels Bormann (March 2015) Revision of the microwave coefficient files in the IFS, ECMWF Technical Memoranda n. 749. DOI: 10.21957/bvjbx3kf
- S-H. Lee, Kirsti Salonen, Niels Bormann (July 2015) Assessment of AMV's from COMS in the ECMWF system, ECMWF Technical Memorandum n. 757. DOI: 10.21957/9eeh2d3q4
- Niels Bormann, Massimo Bonavita, Rossana Dragani, Reime Eresmaa, Marco Matricardi, A. McNally (July 2015) Enhancing the impact of IASI observations through an updated observation error covariance matrix, ECMWF Technical Memoranda n. 756. DOI: 10.21957/gq8j2gjp7
- Qifeng Lu, Heather Lawrence, Niels Bormann, Stephen English, Katie Lean, Nigel Atkinson, W. Bell, F. Carminati (May 2015) An evaluation of FY-3C satellite data quality at ECMWF and the Met Office, ECMWF Technical Memorandum n. 767. DOI: 10.21957/3l7g9nqun
2014
- (May 2014) Atmospheric Motion Vectors from Model Simulations. Part II: Interpretation as Spatial and Vertical Averages of Wind and Role of Clouds, J. Appl. Met. & Climat..
- (May 2014) Atmospheric Motion Vectors from Model Simulations. Part I: Methods and Characterization as Single-Level Estimates of Wind, J. Appl. Met. & Climat..
- (May 2014) Representing equilibrium and non-equilibrium convection in large-scale models, J. Atmos. Sc..
- Peter Bechtold, Noureddine Semane, Philippe Lopez, Jean-Pierre Chaboureau, Anton Beljaars, Niels Bormann (February 2014) Representing Equilibrium and Nonequilibrium Convection in Large-Scale Models, Journal of the Atmospheric Sciences. DOI: 10.1175/jas-d-13-0163.1
- Niels Bormann, Angeles Hernandez-Carrascal, Régis Borde, Hans-Joachim Lutz, Jason A. Otkin, Steve Wanzong (January 2014) Atmospheric Motion Vectors from Model Simulations. Part I: Methods and Characterization as Single-Level Estimates of Wind, Journal of Applied Meteorology and Climatology. DOI: 10.1175/jamc-d-12-0336.1
- Angeles Hernandez-Carrascal, Niels Bormann (January 2014) Atmospheric Motion Vectors from Model Simulations. Part II: Interpretation as Spatial and Vertical Averages of Wind and Role of Clouds, Journal of Applied Meteorology and Climatology. DOI: 10.1175/jamc-d-12-0337.1
- Alan Geer, Fabrizio Baordo, Niels Bormann, Stephen English (May 2014) All-sky assimilation of microwave humidity sounders, ECMWF Newsletter, issue 140, pp. 25-32. DOI: 10.21957/br7ab68f
- Mohamed Dahoui, Niels Bormann, L. Isaksen (May 2014) Automatic checking of observations at ECMWF, ECMWF Newsletter, issue 140, pp. 21-24. DOI: 10.21957/kuwqjp5y
- Alan Geer, Fabrizio Baordo, Niels Bormann, S.J. English (November 2014) All-sky assimilation of microwave humidity sounders, ECMWF Technical Memoranda n. 741. DOI: 10.21957/obosmx154
- K. Chen, S.J. English, Niels Bormann, J. Zhu (September 2014) Assessment of FY-3A and FY-3B MWHS observations, ECMWF Technical Memorandum n. 734. DOI: 10.21957/s2hmm4nht
2013
- (May 2013) Evaluation and assimilation of ATMS data in the ECMWF system, J. Geophys. Res.. DOI: 10.1002/2013JD02032
- Niels Bormann, Anne Fouilloux, William Bell (December 2013) Evaluation and assimilation of ATMS data in the ECMWF system, Journal of Geophysical Research: Atmospheres. DOI: 10.1002/2013jd020325
- Peter Bechtold, Semane N., Philippe Lopez, Chaboureau J.-P., Anton Beljaars, Niels Bormann (May 2013) Breakthrough in forecasting equilibrium and non-equilibrium convection, ECMWF Newsletter, issue 136, pp. 15-22. DOI: 10.21957/8j0xcrpk
- Niels Bormann, Tony McNally (May 2013) New microwave and infrared data from the S-NPP satellite, ECMWF Newsletter, issue 136, pp. 28-30. DOI: 10.21957/vh0r17kv
- Kirsti Salonen, Niels Bormann (May 2013) Winds of change in the use of Atmospheric Motion Vectors in the ECMWF system, ECMWF Newsletter, issue 136, pp. 23-27. DOI: 10.21957/dgp5p0z3
- S.J. English, A. McNally, Niels Bormann, Kirsti Salonen, Marco Matricardi, Andras Horanyi, Michael Rennie, Marta Janiskova, S. Di Michele, Alan Geer, Enza di Tomaso, Carla Cardinali, Patricia de Rosnay, J.M. Sabater, Massimo Bonavita, C. Albergel, Richard Engelen, Jean-Noel THEPAUT (November 2013) Impact of satellite data, ECMWF Technical Memoranda n. 711, pp. 46. DOI: 10.21957/b6596ot1s
- Niels Bormann, Massimo Bonavita (October 2013) Spread of the ensemble of data assimilations in radiance space, ECMWF Technical Memoranda n. 708, pp. 29. DOI: 10.21957/edrq57brh
- Peter Bechtold, N. Semane, Philippe Lopez, J.P. Chaboureau, Anton Beljaars, Niels Bormann (September 2013) Representing equilibrium and non-equilibrium convection in large-scale models, ECMWF Technical Memorandum n. 705, pp. 27. DOI: 10.21957/v28agb6n2
2012
- (May 2012) Improved Assimilation of Data from China\textquoterights FY-3A Microwave Temperature, Atmos. Sci. Letters.
- Qifeng Lu, W. Bell, N. Bormann, P. Bauer, C. Peubey, A. J. Geer (January 2012) Improved assimilation of data from China's FY‐3A microwave temperature sounder, Atmospheric Science Letters. DOI: 10.1002/asl.354
- A. Hernandez-Carrascal, Niels Bormann, R. Borde, H.-J. Lutz, J. Otkin, S. Wanzong (October 2012) Atmospheric motion vectors from model simulations. Part I: Methods and characterisation as single-level estimates of wind, ECMWF Technical Memorandum n. 677, pp. 31. DOI: 10.21957/eoa58569n
- A. Hernandez-Carrascal, Niels Bormann (October 2012) Atmospheric motion vectors from model simulations. Part II: Interpretation as spatial and vertical averages of wind and role of clouds, ECMWF Technical Memorandum n. 678, pp. 36. DOI: 10.21957/8xfxhq6sn
- Niels Bormann, Anne Fouilloux, W. Bell (December 2012) Evaluation and assimilation of ATMS data in the ECMWF system, ECMWF Technical Memorandum n. 689, pp. 15. DOI: 10.21957/w8ytxrcq5
- Niels Bormann, Alan Geer, S.J. English (February 2012) Evaluation of the microwave ocean surface emissivity model FASTEM-5 in the IFS, ECMWF Technical Memoranda n. 667. DOI: 10.21957/l936s9df
2011
- (May 2011) Estimates of observation error characteristics in clear and cloudy regions for microwave imager radiances from NWP, Quart. J. Roy. Meteor. Soc..
- Qifeng Lu, William Bell, Peter Bauer, Niels Bormann, Carole Peubey (November 2011) Characterizing the FY-3A Microwave Temperature Sounder Using the ECMWF Model, Journal of Atmospheric and Oceanic Technology. DOI: 10.1175/jtech-d-10-05008.1
- D. P. Dee, S. M. Uppala, A. J. Simmons, P. Berrisford, P. Poli, S. Kobayashi, U. Andrae, M. A. Balmaseda, G. Balsamo, P. Bauer, P. Bechtold, A. C. M. Beljaars, L. van de Berg, J. Bidlot, N. Bormann, C. Delsol, R. Dragani, M. Fuentes, A. J. Geer, L. Haimberger, S. B. Healy, H. Hersbach, E. V. Hólm, L. Isaksen, P. Kållberg, M. Köhler, M. Matricardi, A. P. McNally, B. M. Monge‐Sanz, J.‐J. Morcrette, B.‐K. Park, C. Peubey, P. de Rosnay, C. Tavolato, J.‐N. Thépaut, F. Vitart (April 2011) The ERA‐Interim reanalysis: configuration and performance of the data assimilation system, Quarterly Journal of the Royal Meteorological Society. DOI: 10.1002/qj.828
- Niels Bormann, Alan J. Geer, Peter Bauer (October 2011) Estimates of observation‐error characteristics in clear and cloudy regions for microwave imager radiances from numerical weather prediction, Quarterly Journal of the Royal Meteorological Society. DOI: 10.1002/qj.833
- Niels Bormann, A. Collard, Peter Bauer (May 2011) Observation errors and their correlations for satellite radiances, ECMWF Newsletter, issue 128, pp. 17-22. DOI: 10.21957/3wa0jssp
- Qifeng Lu, W. Bell, Peter Bauer, Niels Bormann, C. Peubey (February 2011) Characterising the FY-3A microwave temperature sounder using the ECMWF model, ECMWF Technical Memorandum n. 641, pp. 13. DOI: 10.21957/tb92c4mj8
- Qifeng Lu, W. Bell, Peter Bauer, Niels Bormann, C. Peubey, Alan Geer (February 2011) Improved assimilation of data from China's FY-3A Microwave Temperature Sounder (MWTS), ECMWF Technical Memoranda n. 642, pp. 13. DOI: 10.21957/4grqj1vwq
- Niels Bormann, Alan Geer, Tomas Wilhelmsson (September 2011) Operational implementation of RTTOV-10 in the IFS, ECMWF Technical Memoranda n. 650, pp. 23. DOI: 10.21957/kzbdu7zb