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Annual variations in phytoplankton biomass driven by small-scale physical processes

Madhavan Girijakumari Keerthi 1 Channing J. Prend 2 Olivier Aumont 3 Marina Lévy 1 
1 PROTEO - Processus et interactions de fine échelle océanique
LOCEAN - Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques
3 NEMO R&D - Nucleus for European Modeling of the Ocean
LOCEAN - Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques
Abstract : Phytoplankton biomass exhibits substantial year-to-year changes, and understanding these changes is crucial to fisheries management and projecting future climate. These annual changes result partly from low-frequency climate modes that also lead to variations in sea surface temperature (SST). Here we evaluate the contribution of small scales to annual fluctuations based on a global analysis of satellite observations of sea surface chlorophyll (SChl), an indicator of phytoplankton biomass, and of SST from 1999 to 2018. We disentangle the spatio-temporal scales of variability in the time series and find that besides the prominent seasonal cycle, SChl is dominated by high-frequency fluctuations (
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Submitted on : Tuesday, November 15, 2022 - 10:37:45 AM
Last modification on : Friday, December 2, 2022 - 10:02:05 AM

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Madhavan Girijakumari Keerthi, Channing J. Prend, Olivier Aumont, Marina Lévy. Annual variations in phytoplankton biomass driven by small-scale physical processes. Nature Geoscience, 2022, ⟨10.1038/s41561-022-01057-3⟩. ⟨ird-03852817⟩

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