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Influence of Aeolus data assimilation on the representation of gravity waves in ECMWF analysis fields

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/
Document Type:Conference or Workshop Item (Speech)
Title:Influence of Aeolus data assimilation on the representation of gravity waves in ECMWF analysis fields
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Krisch, IsabellDLR, IPAhttps://orcid.org/0000-0001-6646-7277
Rennie, MichaelECMWF, Reading, UKUNSPECIFIED
Kaifler, BerndDLR, IPAhttps://orcid.org/0000-0002-5891-242X
Gisinger, SonjaDLR, IPAhttps://orcid.org/0000-0001-8188-4458
Reitebuch, OliverDLR, IPAhttps://orcid.org/0000-0002-8503-0094
Rapp, MarkusDLR, IPAhttps://orcid.org/0000-0003-1508-5900
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 - Earth Observation
DLR - Research theme (Project):R - Atmospheric and climate research
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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