A trio of climatologists at the Southern Ocean Carbon–Climate Observatory, working with a colleague with the Coastal Systems and Earth Observation Research Group, all in South Africa, reports evidence that phytoplankton have initiated later and terminated earlier in the Southern Ocean over the past quarter century. In their study, reported in the journal Nature Climate Change, Sandy Thomalla, Sarah-Anne Nicholson, Thomas Ryan-Keogh and Marié Smith, analyzed of 25 years of satellite ocean color chlorophyl-a data.
, The two schematics highlight the regions that changed their classification between 1998–2010 and 2011–2022 and indicate what they changed from, A bar chart showing the percentage of the Southern Ocean that was classified as each of the four regions between the different periods.
To learn more about the impact of global warming on phytoplankton in the Southern Ocean, the research team obtained and analyzedcaptured over the past 25 years that showed the extent of chlorophyl-a coloration, which the team used as a proxy for biomass.
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