An Atlantic streamer in stratospheric ozone observations and SD-WACCM simulation data

Hocke, Klemens; Schranz, Franziska Martina; Maillard Barras, Eliane; Moreira Méndez, Lorena; Kämpfer, Niklaus (2017). An Atlantic streamer in stratospheric ozone observations and SD-WACCM simulation data. Atmospheric chemistry and physics, 17(5), pp. 3445-3452. European Geosciences Union 10.5194/acp-17-3445-2017

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Observation and simulation of individual ozone streamers are important for the description and understanding of non-linear transport processes in the middle atmosphere. A sudden increase in mid-stratospheric ozone occurred above central Europe on 4 December 2015. The GROund-based Millimeter-wave Ozone Spectrometer (GROMOS) and the Stratospheric Ozone MOnitoring RAdiometer (SOMORA) in Switzerland measured an ozone enhancement of about 30 % at 34 km altitude (8.3 hPa) from 1 to 4 December. A similar ozone increase is simulated by the Specified Dynamics Whole Atmosphere Community Climate (SD-WACCM) model. Further, the global ozone fields at 34 km altitude (8.3 hPa) from SD-WACCM and the satellite experiment Aura/MLS show a remarkable agreement for the location and timing of an ozone streamer (large-scale tongue-like structure) extending from the subtropics in northern America over the Atlantic to central Europe. This agreement indicates that SD-WACCM can inform us about the wind inside the Atlantic ozone streamer. SD-WACCM shows an eastward wind of about 100 m s−1 inside the Atlantic streamer in the mid-stratosphere. SD-WACCM shows that the Atlantic streamer flows along the edge of the polar vortex. The Atlantic streamer turns southward at an erosion region of the polar vortex located above the Caspian Sea. The spatial distribution of stratospheric water vapour indicates a filament outgoing from this erosion region. The Atlantic streamer, the polar vortex erosion region and the water vapour filament belong to the process of planetary wave breaking in the so-called surf zone of the northern midlatitude winter stratosphere.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Institute of Applied Physics
10 Strategic Research Centers > Oeschger Centre for Climate Change Research (OCCR)
08 Faculty of Science > Institute of Applied Physics > Microwaves

UniBE Contributor:

Hocke, Klemens; Schranz, Franziska Martina; Moreira Méndez, Lorena and Kämpfer, Niklaus

Subjects:

600 Technology > 620 Engineering
500 Science
500 Science > 530 Physics

ISSN:

1680-7316

Publisher:

European Geosciences Union

Language:

English

Submitter:

Simone Corry

Date Deposited:

06 Jun 2017 09:52

Last Modified:

06 Jun 2017 09:52

Publisher DOI:

10.5194/acp-17-3445-2017

BORIS DOI:

10.7892/boris.96977

URI:

https://boris.unibe.ch/id/eprint/96977

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