Global Observations of Tropospheric Bromine Monoxide (BrO) Columns From TROPOMI
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Authors
Chen, Y.
Liu, S.
Zhu, L.
Seo, S.
Richter, A.
Li, X.
Ding, A.
Sun, W.
Shu, L.
Wang, X.
Valks, P.
Hendrick, F.
Koenig, T.K.
Volkamer, R.
Bai, B.
Wang, D.
Pu, D.
Sun, S.
Li, J.
Zuo, X.
Fu, W.
Li, Y.
Zhang, P.
Yang, X.
Fu, T.-M.
Discipline
Earth and related Environmental sciences
Subject
TROPOMI, BrO
retrieval
GEOS-Chem
Audience
Scientific
Date
2023Metadata
Show full item recordDescription
Bromine monoxide (BrO) plays an important role in tropospheric chemistry. The state-of-the-science TROPOspheric Monitoring Instrument (TROPOMI) offers the potential to monitor atmospheric composition with a fine spatial resolution of up to 5.5 × 3.5 km2. We present here the retrieval of tropospheric BrO columns from TROPOMI. We implement a stratospheric correction scheme using a climatological approach based on the latest GEOS-Chem High Performance chemical transport model, and improve the tropospheric air mass factor calculation with TROPOMI surface albedo data accounting for the geometrical dependency. Our product presents a good level of consistency in comparison with measurements from ground-based zenith-sky differential optical absorption spectroscopy (r = 0.67), aircrafts (r = 0.46), and satellites (similar spatial distributions of BrO columns). Furthermore, our retrieval captures BrO enhancements in the polar springtime with values up to 7.8 × 1013 molecules cm−2 and identifies small-scale emission sources such as volcanoes and salt marshes. Based on TROPOMI data, we probe a blowing snow aerosol bromine mechanism in which the snow salinity is reduced to better match simulation and observation. Our TROPOMI tropospheric BrO product contributes high-resolution global information to studies investigating atmospheric bromine chemistry.
Citation
Chen, Y.; Liu, S.; Zhu, L.; Seo, S.; Richter, A.; Li, X.; Ding, A.; Sun, W.; Shu, L.; Wang, X.; Valks, P.; Hendrick, F.; Koenig, T.K.; Volkamer, R.; Bai, B.; Wang, D.; Pu, D.; Sun, S.; Li, J.; Zuo, X.; Fu, W.; Li, Y.; Zhang, P.; Yang, X.; Fu, T.-M. (2023). Global Observations of Tropospheric Bromine Monoxide (BrO) Columns From TROPOMI. , Journal of Geophysical Research: Atmospheres, Vol. 128, Issue 24, e2023JD039091, DOI: 10.1029/2023JD039091.Identifiers
url:
Type
Article
Peer-Review
Yes
Language
eng