Distribution of planktonic biogenic carbonate organisms in the Southern Ocean south of Australia: a baseline for ocean  acidification impact assessment

Trull, Thomas W.; Passmore, Abraham; Davies, Diana M.; Smit, Tim; Berry, Kate; Tilbrook, Bronte

doi:https://doi.org/10.5194/bg-15-31-2018

Articles | Volume 15, issue 1

https://doi.org/10.5194/bg-15-31-2018

© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 3.0 License.

Special issue:

The Ocean in a High-CO₂ World IV

https://doi.org/10.5194/bg-15-31-2018

© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 3.0 License.

Articles | Volume 15, issue 1

Research article

|

03 Jan 2018

Research article |

| 03 Jan 2018

Distribution of planktonic biogenic carbonate organisms in the Southern Ocean south of Australia: a baseline for ocean acidification impact assessment

Thomas W. Trull, Abraham Passmore, Diana M. Davies, Tim Smit, Kate Berry, and Bronte Tilbrook

Supplement

https://doi.org/10.5194/bg-15-31-2018-supplement

Data sets

Moderate-resolution Imaging Spectroradiometer (MODIS) Aqua Chlorophyll Data NASA Goddard Space Flight Center, Ocean Ecology Laboratory, Ocean Biology Processing Group https://doi.org/10.5067/AQUA/MODIS/L3M/CHL/2014

Moderate-resolution Imaging Spectroradiometer (MODIS) Aqua Particulate Inorganic Carbon Data NASA Goddard Space Flight Center, Ocean Ecology Laboratory, Ocean Biology Processing Group https://doi.org/10.5067/AQUA/MODIS/L3M/PIC/2014

NASA Ocean Biogeochemical Model NASA https://giovanni.gsfc.nasa.gov/giovanni/#service=TmAvMp&starttime=&endtime=&data=NOBM_MON_R2014_coc&variableFacets=dataFieldDiscipline%

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Short summary

We present the first large-scale survey of planktonic biogenic carbonate concentrations south of Australia, accompanied by biogenic silica and particulate organic carbon. These suggest that coccolithophores are largely restricted to subantarctic waters and are present in much lower abundance than in Northern Hemisphere polar waters. Comparison to upper ocean properties suggests that thermal tolerance and competition with diatoms for limiting iron may be as influential as ocean acidification.