Measurement report: Understanding the seasonal cycle of Southern Ocean aerosols

Humphries, Ruhi S.; Keywood, Melita D.; Ward, Jason P.; Harnwell, James; Alexander, Simon P.; Klekociuk, Andrew R.; Hara, Keiichiro; McRobert, Ian M.; Protat, Alain; Alroe, Joel; Cravigan, Luke T.; Miljevic, Branka; Ristovski, Zoran D.; Schofield, Robyn; Wilson, Stephen R.; Flynn, Connor J.; Kulkarni, Gourihar R.; Mace, Gerald G.; McFarquhar, Greg M.; Chambers, Scott D.; Williams, Alastair G.; Griffiths, Alan D.

doi:https://doi.org/10.5194/acp-23-3749-2023

Articles | Volume 23, issue 6

https://doi.org/10.5194/acp-23-3749-2023

© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/acp-23-3749-2023

© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 23, issue 6

Measurement report

|

29 Mar 2023

Measurement report |

| 29 Mar 2023

Measurement report: Understanding the seasonal cycle of Southern Ocean aerosols

Ruhi S. Humphries, Melita D. Keywood, Jason P. Ward, James Harnwell, Simon P. Alexander, Andrew R. Klekociuk, Keiichiro Hara, Ian M. McRobert, Alain Protat, Joel Alroe, Luke T. Cravigan, Branka Miljevic, Zoran D. Ristovski, Robyn Schofield, Stephen R. Wilson, Connor J. Flynn, Gourihar R. Kulkarni, Gerald G. Mace, Greg M. McFarquhar, Scott D. Chambers, Alastair G. Williams, and Alan D. Griffiths

Data sets

In-situ total aerosol number using condensation particle counters as observed during the SIPEX II voyage of the Aurora Australis, 2012 R. S. Humphries, S. R. Wilson, M. D. Keywood, J. Ward, and R. Schofield https://doi.org/10.4225/15/5342423241BE4

MARCUS ARM CN and CCN data reprocessed to remove ship exhaust influence R. S. Humphries https://doi.org/10.25919/ezp0-em87

Polar Cell Aerosol Nucleation - atmospheric measurements from the RV Investigator voyage IN2017_V01 R. S. Humphries, J. B. Simmons, I. M. McRobert, J,, Ward, M. D. Keywood, S. D. Chambers, A. D. Griffiths, A. G. Williams, and S. R. Wilson https://doi.org/10.25919/xs0b-an24

Atmospheric aerosol and Cloud Condensation Nuclei concentrations from Macquarie Island from 2016 to 2018 R. S. Humphries, J. Ward, M. D. Keywood, and S. P. Alexander https://doi.org/10.25919/g7jx-k629

CAPRICORN2 - Atmospheric aerosol measurements from the RV Investigator voyage IN2018_V01 R. S. Humphries, I. M. McRobert, J. Ward, J. Harnwell, and M. D. Keywood https://doi.org/10.25919/2h1c-t753

Aerosol Properties, Cold Water Trial voyage (IN2015_E01): CN3 and CCN R. S. Humphries, J. Alroe, J. D. Ward, M. D. Keywood, I. M. McRobert, L. T. Cravigan, and Z. D. Ristovski https://doi.org/10.25919/ytsw-9610

Aerosol Properties, Ice-edge to Equator voyage (IN2016_V03): CN3 and CCN R. S. Humphries, J. Alroe, Z. D. Ristovski, M. D. Keywood, J. D. Ward, I. M. McRobert, L. T. Cravigan, R. Brown https://doi.org/10.25919/g07r-b187

RV Investigator BOM Atmospheric Data Overview (2016 onwards) A. Protat, and R. S. Humphries https://doi.org/10.25919/5f688fcc97166

Antarctic aerosol CN K. Hara https://scidbase.nipr.ac.jp/modules/metadata/index.php?content_id=399&ml_lang=en

Particle number concentrations at Kennaook/Cape Grim M. Keywood, J. Ward, and J. Gras http://ebas-data.nilu.no

Antarctic aerosol CN K. Hara https://doi.org/10.17592/002.2023030399

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Short summary

Observations of aerosols in pristine regions are rare but are vital to constraining the natural baseline from which climate simulations are calculated. Here we present recent seasonal observations of aerosols from the Southern Ocean and contrast them with measurements from Antarctica, Australia and regionally relevant voyages. Strong seasonal cycles persist, but striking differences occur at different latitudes. This study highlights the need for more long-term observations in remote regions.