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Atmospheric Measurement Techniques An interactive open-access journal of the European Geosciences Union
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Discussion papers
https://doi.org/10.5194/amt-2018-365
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/amt-2018-365
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 18 Dec 2018

Research article | 18 Dec 2018

Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Atmospheric Measurement Techniques (AMT).

First high resolution BrO column retrievals from TROPOMI

Sora Seo, Andreas Richter, Anne-Marlene Blechschmidt, Ilias Bougoudis, and John Philip Burrows Sora Seo et al.
  • Institute of Environmental Physics, University of Bremen, Bremen, Germany

Abstract. For more than two decades, satellite observations from instruments such as GOME, SCIAMACHY, GOME-2 and OMI have been used for the monitoring of bromine monoxide (BrO) distributions on global and regional scales. In October 2017, the TROPOspheric Monitoring Instrument (TROPOMI) was launched onboard the Copernicus Sentinel-5 Precursor platform with the goal of continuous daily global trace gas observations with unprecedented spatial resolution. In this study, sensitivity tests were performed to find an optimal wavelength range for TROPOMI BrO retrievals under various measurement conditions. From these sensitivity tests, a wavelength range for TROPOMI BrO retrievals was determined and global data for April 2018 as well as for several case studies were retrieved. Comparison with GOME-2 and OMI BrO retrievals shows good consistency and low scatter of the columns. The examples of individual TROPOMI overpasses show that due to the better signal to noise ratio and finer spatial resolution of 3.5x7km2, TROPOMI BrO retrievals provide good data quality with low fitting errors and unique information on small scale variabilities in various BrO source regions such as Arctic sea ice, salt marshes, and volcanoes.

Sora Seo et al.
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The TROPOMI onboard the Copernicus Sentinel-5 Precursor platform can measure various atmospheric compositions at high spatial resolution and improved spectral resolution compared to its predecessors. Bromine monoxide (BrO) is one of the gases that can be derived from the measured radiances of TROPOMI using Differential Optical Absorption Spectroscopy (DOAS) method. In this paper, we present first retrieval results of BrO column amounts from TROPOMI observations on global and regional scales.
The TROPOMI onboard the Copernicus Sentinel-5 Precursor platform can measure various atmospheric...
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