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This study aims to understand the interannual drivers affecting the seasonal cycle of CO2 in the Southern Ocean.

April 19, 2018BiogeosciencesOpen Access

Interannual drivers of the seasonal cycle of CO ₂ in the Southern Ocean

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Regional analysis reveals seasonal influences on CO2 variability in the Southern Ocean, suggesting significant climate feedbacks.

This study aims to understand the interannual drivers affecting the seasonal cycle of CO2 in the Southern Ocean.
Utilized ensemble machine learning models, including support vector regression and random forest regression, for pCO2 interpolation.
Separated pCO2 analysis into nine regional sectors based on basin and biome.
Analyzed seasonal differences in interannual variability, focusing on summer and winter patterns.
Observed lower confidence in ΔpCO2 estimates during periods with product disagreement.
Identified that winter ΔpCO2 variability is influenced more by mixing and stratification than thermodynamics.
Found that summer ΔpCO2 variability correlates with chlorophyll a concentrations, highlighting different driving mechanisms.

Gregor et al. (2018) studied this question.

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