Lagrangian Scaling and Intermittency of Turbulent CARbon Interface OCean Atmosphere (CARIOCA) Time Series in the Southern Ocean
Résumé
In this study, we analyzed a Lagrangian data set composed of observations from 15 CARbon Interface OCean Atmosphere (CARIOCA) drifting buoys deployed in the Southern Ocean. These buoys recorded sea surface temperature (SST), sea surface salinity (SSS), fugacity of , and chlorophyll a fluorescence at a 1‐hr temporal resolution between 2001 and 2012. We investigated the scaling properties of these time series and identified two distinct power‐law spectral regimes, separated by a characteristic timescale of approximately 10 days, likely associated with synoptic‐scale processes. In the high‐frequency regime, SST and SSS exhibited spectral scaling exponents close to 2, consistent with theoretical predictions for three‐dimensional Lagrangian turbulence. For and fluorescence, the mean spectral slopes deviated from 2, with and , respectively, suggesting an influence of biological or biogeochemical activity. Additionally, we detected intermittency in all time series within this regime and estimated a Hurst exponent of and an intermittency coefficient of for , corresponding to a correlated and intermittent random walk. The large‐scale regime, for its part, shows slopes close to 1.3 for all scalars. We further analyzed dependencies between and the other variables using Probability Density Function (PDF) quotient analysis. The results revealed that synoptic‐scale variability plays a key role in governing the interdependence among the variables. Stronger dependencies with SST and SSS were observed at timescales shorter than 10 days, while an asymmetric relationship with fluorescence emerged at longer timescales, likely reflecting primary production processes.
Domaines
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Cite 10.25921/9wpn-th28 Jeu de données Bakker, D. C. E., Alin, S. R., Bates, N., Becker, M., Gkritzalis, T., Jones, S. D., Kozyr, A., Lauvset, S. K., Metzl, N., Nakaoka, S., O’Brien, K. M., Olsen, A., Pierrot, D., Steinhoff, T., Sutton, A. J., Takao, S., Tilbrook, B., Wada, C., Wanninkhof, R., … Woosley, R. J. (2024). Surface Ocean CO2 Atlas Database Version 2024 (SOCATv2024) (NCEI Accession 0293257) [Data set]. NOAA National Centers for Environmental Information. https://doi.org/10.25921/9WPN-TH28
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Cite 10.1594/PANGAEA.851613 Jeu de données Boutin, J., & Merlivat, L. (2016). Underway physical oceanography and carbon dioxide measurements during Drifting buoy cruise CARIOCA_2001_11_28527 [Data set]. PANGAEA. https://doi.org/10.1594/PANGAEA.851613
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Cite 10.1594/PANGAEA.851614 Jeu de données Boutin, J., & Merlivat, L. (2016). Underway physical oceanography and carbon dioxide measurements during Drifting buoy cruise CARIOCA_2002_01_22831 [Data set]. PANGAEA. https://doi.org/10.1594/PANGAEA.851614
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Cite 10.1594/PANGAEA.851615 Jeu de données Boutin, J., & Merlivat, L. (2016). Underway physical oceanography and carbon dioxide measurements during Drifting buoy cruise CARIOCA_2002_01_28528 [Data set]. PANGAEA. https://doi.org/10.1594/PANGAEA.851615
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Cite 10.1594/PANGAEA.851616 Jeu de données Boutin, J., & Merlivat, L. (2016). Underway physical oceanography and carbon dioxide measurements during Drifting buoy cruise CARIOCA_2003_01_03739 [Data set]. PANGAEA. https://doi.org/10.1594/PANGAEA.851616
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Cite 10.1594/PANGAEA.851617 Jeu de données Boutin, J., & Merlivat, L. (2016). Underway physical oceanography and carbon dioxide measurements during Drifting buoy cruise CARIOCA_2003_01_13060 [Data set]. PANGAEA. https://doi.org/10.1594/PANGAEA.851617
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Cite 10.1594/PANGAEA.851618 Jeu de données Boutin, J., & Merlivat, L. (2016). Underway physical oceanography and carbon dioxide measurements during Drifting buoy cruise CARIOCA_2004_03_01110 [Data set]. PANGAEA. https://doi.org/10.1594/PANGAEA.851618
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Cite 10.1594/PANGAEA.851619 Jeu de données Boutin, J., & Merlivat, L. (2016). Underway physical oceanography and carbon dioxide measurements during Drifting buoy cruise CARIOCA_2004_03_03740 [Data set]. PANGAEA. https://doi.org/10.1594/PANGAEA.851619
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Cite 10.1594/PANGAEA.851620 Jeu de données Boutin, J., & Merlivat, L. (2016). Underway physical oceanography and carbon dioxide measurements during Drifting buoy cruise CARIOCA_20050128 [Data set]. PANGAEA. https://doi.org/10.1594/PANGAEA.851620
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Cite 10.1594/PANGAEA.851621 Jeu de données Boutin, J., & Merlivat, L. (2016). Underway physical oceanography and carbon dioxide measurements during Drifting buoy cruise CARIOCA_2006_01_13060 [Data set]. PANGAEA. https://doi.org/10.1594/PANGAEA.851621
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Cite 10.1594/PANGAEA.851623 Jeu de données Boutin, J., & Merlivat, L. (2016). Underway physical oceanography and carbon dioxide measurements during Drifting buoy cruise CARIOCA_2006_11_26128 [Data set]. PANGAEA. https://doi.org/10.1594/PANGAEA.851623
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Cite 10.1594/PANGAEA.851622 Jeu de données Boutin, J., & Merlivat, L. (2016). Underway physical oceanography and carbon dioxide measurements during Drifting buoy cruise CARIOCA_2006_11_30384 [Data set]. PANGAEA. https://doi.org/10.1594/PANGAEA.851622
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Cite 10.1594/PANGAEA.851624 Jeu de données Boutin, J., & Merlivat, L. (2016). Underway physical oceanography and carbon dioxide measurements during Drifting buoy cruise CARIOCA_2007_01_25932 [Data set]. PANGAEA. https://doi.org/10.1594/PANGAEA.851624
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Cite 10.1594/PANGAEA.851625 Jeu de données Boutin, J., & Merlivat, L. (2016). Underway physical oceanography and carbon dioxide measurements during Drifting buoy cruise CARIOCA_2008_04_25935 [Data set]. PANGAEA. https://doi.org/10.1594/PANGAEA.851625
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Cite 10.1594/PANGAEA.851626 Jeu de données Boutin, J., & Merlivat, L. (2016). Underway physical oceanography and carbon dioxide measurements during Drifting buoy cruise CARIOCA_2008_04_25940 [Data set]. PANGAEA. https://doi.org/10.1594/PANGAEA.851626
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Cite 10.1594/PANGAEA.851627 Jeu de données Boutin, J., & Merlivat, L. (2016). Underway physical oceanography and carbon dioxide measurements during Drifting buoy cruise CARIOCA_2011_10_26128 [Data set]. PANGAEA. https://doi.org/10.1594/PANGAEA.851627
