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Atmospheric Chemistry and Physics An interactive open-access journal of the European Geosciences Union
https://doi.org/10.5194/acp-2017-1080
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 4.0 License.
Research article
23 Nov 2017
Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Atmospheric Chemistry and Physics (ACP).
Diurnal variation in middle atmospheric ozone by ground based microwave radiometry at Ny-Ålesund over 1 year
Franziska Schranz1, Susana Fernandez2, Niklaus Kämpfer1, and Mathias Palm3 1Institute of Applied Physics, University of Bern, Bern, Switzerland
2Department of Physics, University of Santiago de Chile, Santiago, Chile
3Institute of Environmental Physics, University of Bremen, Bremen, Germany
Abstract. We present an analysis of the diurnal ozone cycle from one year of continuous ozone measurements from two ground based microwave radiometers in the Arctic. The instruments GROMOS-C and OZORAM have been located at the AWIPEV research base at Ny-Ålesund, Svalbard (79° N, 12° E) and gathered a comprehensive time series of middle atmospheric ozone profiles with a high time resolution. An intercomparison was performed with EOS MLS and ozone sonde measurements and simulations with SD-WACCM. The measured datasets were used to study the photochemically induced diurnal cycle of ozone in the stratosphere and mesosphere. Throughout the year the insolation in the Arctic changes drastically from polar night to polar day. Accordingly, the seasonal variations in the diurnal ozone cycle are large. In the stratosphere we found a diurnal cycle throughout the whole period of polar day with the largest amplitude in April. In the mesosphere a diurnal cycle was detected in spring and fall. SD-WACCM has proved to well capture the diurnal cycle and was therefore used to analyse the chemical reaction rates of ozone production and loss at equinox and summer solstice. Furthermore GROMOS-C proofed capable of measuring the tertiary ozone layer above Ny-Ålesund in winter.

Citation: Schranz, F., Fernandez, S., Kämpfer, N., and Palm, M.: Diurnal variation in middle atmospheric ozone by ground based microwave radiometry at Ny-Ålesund over 1 year, Atmos. Chem. Phys. Discuss., https://doi.org/10.5194/acp-2017-1080, in review, 2017.
Franziska Schranz et al.
Franziska Schranz et al.
Franziska Schranz et al.

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Short summary
We present 1 year of ozone measurements form two ground based microwave radiometers located at Ny-Alesund, Svalbard. The ozone measurements cover an altitude range of 25–70 km altitude and have a high time resolution of 1–2 hours. With these datasets and model data a comprehensive analysis of the ozone diurnal cycle in the Arctic is performed for the different insolation conditions throughout the year. In the stratosphere we find a diurnal cycle which persists over the whole polar day.
We present 1 year of ozone measurements form two ground based microwave radiometers located at...
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