Zobrazeno 1 - 10 of 54 pro vyhledávání: '"Niels Bormann"'
1
Akademický článek
Assessment of New Satellite Missions within the Framework of Numerical Weather Prediction
Autor: Stuart Newman, Fabien Carminati, Heather Lawrence, Niels Bormann, Kirsti Salonen, William Bell
Publikováno v: Remote Sensing, Vol 12, Iss 10, p 1580 (2020)
Confidence in the use of Earth observations for monitoring essential climate variables (ECVs) relies on the validation of satellite calibration accuracy to within a well-defined uncertainty. The gap analysis for integrated atmospheric ECV climate mon
Externí odkaz: https://doaj.org/article/ebf25f7d0cf245a199b71447fc53ccca
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2
Akademický článek
Slant path radiative transfer for the assimilation of sounder radiances
Autor: Niels Bormann
Publikováno v: Tellus: Series A, Dynamic Meteorology and Oceanography, Vol 69, Iss 1 (2017)
This paper reports on the influence of taking the slanted satellite viewing geometry better into account in the simulation and assimilation of sounding radiances. The traditional approach is to use a vertical profile extracted at the geo-location inf
Externí odkaz: https://doaj.org/article/2ce7da0e02934f559320ce5806ca7c95
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3
Using Model Cloud Information to Reassign Low-Level Atmospheric Motion Vectors in the ECMWF Assimilation System
Autor: Katie Lean, Niels Bormann
Publikováno v: Journal of Applied Meteorology and Climatology. 62:361-376
This paper investigates the use of model cloud information in the assimilation of low-level atmospheric motion vectors (AMVs) in the ECMWF global data assimilation system, with the aim to characterize and address issues encountered in the assimilatio
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::603b8098446129f4b9ad89659bdbb012
https://doi.org/10.1175/jamc-d-22-0094.1
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5
Assimilation of AMSU-A in All-Sky Conditions
Autor: David I. Duncan, Niels Bormann, Alan J. Geer, Peter Weston
Publikováno v: Monthly Weather Review. 150:1023-1041
Radiances from microwave temperature sounders have been assimilated operationally at ECMWF for two decades, but observations significantly affected by clouds and precipitation have been screened out. Extending successful assimilation beyond clear-sky
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::04ce33c753fd0a381e273a155d247524
https://doi.org/10.1175/mwr-d-21-0273.1
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6
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)
Autor: Niels Bormann, Sebastien Massart, Cristina Lupu, Massimo Bonavita
Publikováno v: Geoscientific Model Development, Vol 14, Pp 5467-5485 (2021)
The assimilation of clear-sky radiance in the European Centre for Medium-Range Weather Forecasts (ECMWF) atmospheric analysis relies on the clear-sky radiances observation operator. Some of these radiances have frequencies that make them sensitive to
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::027b978633ea000652086f7eda2015c1
https://gmd.copernicus.org/articles/14/5467/2021/gmd-14-5467-2021.pdf
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10
Growing Operational Use of FY-3 Data in the ECMWF System
Autor: Niels Bormann, Keyi Chen, Katrin Lonitz, Sean Healy, Heather Lawrence, Qifeng Lu, David Duncan, Stephen English
Publikováno v: Advances in Atmospheric Sciences. 38:1285-1298
This paper reviews the data quality and impact of observations from the FY-3 satellite series used operationally in the ECMWF system. This includes data from the passive microwave radiometers MWHS-1, MWHS-2 and MWRI, as well as observations from the
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::eafb3c210f862e41366b963806d35f32
https://doi.org/10.1007/s00376-020-0207-3
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