Krisch, Isabell and Rennie, Michael and Kaifler, Bernd and Gisinger, Sonja and Reitebuch, Oliver and Rapp, Markus (2020) Influence of Aeolus data assimilation on the representation of gravity waves in ECMWF analysis fields. In: EGU General Assembly 2020 (9546). EGU General Assembly 2020. EGU General Assembly 2020, 04.-08. Mai 2020, Online. DOI: 10.5194/egusphere-egu2020-9546
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Abstract
In January 2020, the European Centre for Medium-Range Weather Forecast (ECMWF) became the first numerical weather prediction (NWP) centre to assimilate wind observations from the new European Space Agency (ESA)'s Earth Explorer satellite Aeolus for operational forecasting. Aeolus was launched into space on August 22nd, 2018, carrying the world's first spaceborne wind lidar, the Atmospheric Laser Doppler Instrument (ALADIN). ALADIN measures profiles of line-of-sight wind components from 30km altitude down to the Earth's surface or to the level where the lidar signal is attenuated by optically thick clouds. Impact assessment studies performed at ECMWF in 2019, show improved weather forecasting skills, by assimilating Aeolus wind measurements. As a side effect, these impact experiments also reveal an influence of Aeolus data assimilation on the representation of resolved gravity waves in the ECMWF model fields. Both, orographic and non-orographic gravity waves are impacted by the Aeolus data assimilation. This impact of Aeolus data assimilation on the representation of gravity waves in ECMWF will be presented for selected case studies in the southern hemisphere. Ground-based and airborne measurement data from the SOUTHTRAC campaign will be used for validation where available.
Item URL in elib: | https://elib.dlr.de/138787/ | |||||||||||||||||||||
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Document Type: | Conference or Workshop Item (Speech) | |||||||||||||||||||||
Title: | Influence of Aeolus data assimilation on the representation of gravity waves in ECMWF analysis fields | |||||||||||||||||||||
Authors: |
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Date: | 5 May 2020 | |||||||||||||||||||||
Journal or Publication Title: | EGU General Assembly 2020 | |||||||||||||||||||||
Refereed publication: | No | |||||||||||||||||||||
Open Access: | No | |||||||||||||||||||||
Gold Open Access: | No | |||||||||||||||||||||
In SCOPUS: | No | |||||||||||||||||||||
In ISI Web of Science: | No | |||||||||||||||||||||
DOI : | 10.5194/egusphere-egu2020-9546 | |||||||||||||||||||||
Publisher: | EGU General Assembly 2020 | |||||||||||||||||||||
Series Name: | EGU2020 | |||||||||||||||||||||
Status: | Published | |||||||||||||||||||||
Keywords: | Aeolus, Schwerewellen, Datenassimilation | |||||||||||||||||||||
Event Title: | EGU General Assembly 2020 | |||||||||||||||||||||
Event Location: | Online | |||||||||||||||||||||
Event Type: | international Conference | |||||||||||||||||||||
Event Dates: | 04.-08. Mai 2020 | |||||||||||||||||||||
HGF - Research field: | Aeronautics, Space and Transport | |||||||||||||||||||||
HGF - Program: | Space | |||||||||||||||||||||
HGF - Program Themes: | Earth Observation | |||||||||||||||||||||
DLR - Research area: | Raumfahrt | |||||||||||||||||||||
DLR - Program: | R EO - Erdbeobachtung | |||||||||||||||||||||
DLR - Research theme (Project): | R - Vorhaben Atmosphären- und Klimaforschung | |||||||||||||||||||||
Location: | Oberpfaffenhofen | |||||||||||||||||||||
Institutes and Institutions: | Institute of Atmospheric Physics > Lidar Institute of Atmospheric Physics > Transport Meteorology Institute of Atmospheric Physics | |||||||||||||||||||||
Deposited By: | Krisch, Isabell | |||||||||||||||||||||
Deposited On: | 30 Nov 2020 15:18 | |||||||||||||||||||||
Last Modified: | 30 Nov 2020 15:18 |
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