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© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

  16 Mar 2020

16 Mar 2020

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This preprint is currently under review for the journal ACP.

Long-term Time-series of Arctic Tropospheric BrO derived from UV-VIS Satellite Remote Sensing and its Relation to First Year Sea Ice

Ilias Bougoudis1, Anne-Marlene Blechschmidt1, Andreas Richter1, Sora Seo1, John Philip Burrows1, Nicolas Theys2, and Annette Rinke3 Ilias Bougoudis et al.
  • 1Institute of Environmental Physics, University of Bremen, Bremen, 28359, Germany
  • 2Belgian Institute for Space Aeronomy (IASB-BIRA), Brussels, Belgium
  • 3Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Potsdam, Germany

Abstract. Arctic Amplification describes the rapid increase of the air temperature in the past three decades in the Arctic, which impacts on physicochemical conditions, the ecosystem and biogeochemistry. Every polar spring, the BrO explosion, a series of chemical reactions that release bromine molecules to the troposphere occurs over sea ice covered regions. This autocatalytic mechanism depletes boundary layer and tropospheric ozone, thereby changes the oxidizing capacity of the atmosphere and facilitates the deposition of metals (e.g. Hg). In this study, we present a 22 year consolidated and consistent tropospheric BrO dataset, derived from four different UV-VIS satellite instruments and investigate the BrO evolution under the impact of Arctic Amplification. The retrieval data products from the different sensors are compared during periods of overlap and show good agreement. By studying the sensor merged time-series of tropospheric BrO vertical column densities, we find an increase in the magnitude of BrO explosion events under the impact of Arctic Amplification with an upward trend of about 1.5 % per year. Furthermore, the areas where BrO plumes frequently appear have changed, extending over larger regions in the Arctic during more recent years. Comparison to sea ice age data suggests that the reported changes in tropospheric BrO are linked in a complex way to the increase of first-year ice extent in the Arctic.

Ilias Bougoudis et al.

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Ilias Bougoudis et al.

Ilias Bougoudis et al.


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Latest update: 07 Aug 2020
Publications Copernicus
Short summary
This paper presents a 22 year (1996 to 2017) consistent Arctic tropospheric BrO dataset, derived from four satellite remote sensing instruments. A slight increase of BrO over this period, when the temperature in the Arctic has increased rapidly, can be seen. Furthermore, comparisons of BrO with sea ice age reveal a complex relation between the two, suggesting that the increase of first year sea ice in the Arctic has an impact on tropospheric BrO abundacies.
This paper presents a 22 year (1996 to 2017) consistent Arctic tropospheric BrO dataset, derived...