Key challenges for tropospheric chemistry in the Southern Hemisphere

This commentary paper from the recently formed International Global Atmospheric Chemistry (IGAC) Southern Hemisphere Working Group outlines key issues in atmospheric composition research that particularly impact the Southern Hemisphere. In this article, we present a broad overview of many of the challenges for understanding atmospheric chemistry in the Southern Hemisphere, before focusing in on the most significant factors that differentiate it from the Northern Hemisphere. We present sections on the importance of biogenic emissions and fires in the Southern Hemisphere, showing that these emissions often dominate over anthropogenic emissions in many regions. We then describe how these and other factors influence air quality in different parts of the Southern Hemisphere. Finally, we describe the key role of the Southern Ocean in influencing atmospheric chemistry and conclude with a description of the aims and scope of the newly formed IGAC Southern Hemisphere Working Group.

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Author Paton-Walsh, Clare
Emmerson, Kathryn M.
Garland, Rebecca M.
Keywood, Melita
Hoelzemann, Judith J.
Huneeus, Nicolás
Buchholz, Rebecca R.
Humphries, Ruhi S.
Altieri, Katye
Schmale, Julia
Wilson, Stephen R.
Labuschagne, Casper
Kalisa, Egide
Fisher, Jenny A.
Deutscher, Nicholas M.
van Zyl, Pieter G.
Beukes, Johan P.
Joubert, Warren
Martin, Lynwil
Mkololo, Thumeka
Barbosa, Cybelli
de Fatima Andrade, Maria
Schofield, Robyn
Mallet, Marc D.
Harvey, Mike J.
Formenti, Paola
Piketh, Stuart J.
Olivares, Gustavo
Publisher UCAR/NCAR - Library
Publication Date 2022-01-07T00:00:00
Digital Object Identifier (DOI) Not Assigned
Alternate Identifier N/A
Resource Version N/A
Topic Category geoscientificInformation
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Metadata Date 2023-08-18T18:33:02.385501
Metadata Record Identifier edu.ucar.opensky::articles:25109
Metadata Language eng; USA
Suggested Citation Paton-Walsh, Clare, Emmerson, Kathryn M., Garland, Rebecca M., Keywood, Melita, Hoelzemann, Judith J., Huneeus, Nicolás, Buchholz, Rebecca R., Humphries, Ruhi S., Altieri, Katye, Schmale, Julia, Wilson, Stephen R., Labuschagne, Casper, Kalisa, Egide, Fisher, Jenny A., Deutscher, Nicholas M., van Zyl, Pieter G., Beukes, Johan P., Joubert, Warren, Martin, Lynwil, Mkololo, Thumeka, Barbosa, Cybelli, de Fatima Andrade, Maria, Schofield, Robyn, Mallet, Marc D., Harvey, Mike J., Formenti, Paola, Piketh, Stuart J., Olivares, Gustavo. (2022). Key challenges for tropospheric chemistry in the Southern Hemisphere. UCAR/NCAR - Library. http://n2t.net/ark:/85065/d7183b3t. Accessed 24 June 2025.

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