Diurnal variation in middle-atmospheric ozone observed by ground-based microwave radiometry at Ny-Ålesund over 1 year

Schranz, Franziska Martina; Fernandez, Susana; Kämpfer, Niklaus; Palm, Mathias (2018). Diurnal variation in middle-atmospheric ozone observed by ground-based microwave radiometry at Ny-Ålesund over 1 year. Atmospheric chemistry and physics, 18(6), pp. 4113-4130. European Geosciences Union 10.5194/acp-18-4113-2018

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We present an analysis of the diurnal ozone cycle from 1 year of continuous ozone measurements from two ground-based microwave radiometers in the Arctic. The instruments GROMOS-C and OZORAM are 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 data sets 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 entire 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 been proven to capture the diurnal cycle well and was therefore used to analyse the chemical reaction rates of ozone production and loss at equinox and summer solstice. Furthermore GROMOS-C proved capable of measuring the tertiary ozone layer above Ny-Ålesund in winter.

Item Type:

Journal Article (Original Article)


08 Faculty of Science > Institute of Applied Physics

UniBE Contributor:

Schranz, Franziska Martina


600 Technology > 620 Engineering




European Geosciences Union




Franziska Stämpfli

Date Deposited:

24 Sep 2018 09:21

Last Modified:

23 Oct 2019 08:08

Publisher DOI:






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