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Offshore transport of particulate organic carbon in the California Current System by mesoscale eddies

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  • Caitlin M. Amos

    (University of Georgia)

  • Renato M. Castelao

    (University of Georgia)

  • Patricia M. Medeiros

    (University of Georgia)

Abstract

The California Current System is characterized by upwelling and rich mesoscale eddy activity. Cyclonic eddies generally pinch off from meanders in the California Current, potentially trapping upwelled water along the coast and transporting it offshore. Here, we use satellite-derived measurements of particulate organic carbon (POC) as a tracer of coastal water to show that cyclones located offshore that were generated near the coast contain higher carbon concentrations in their interior than cyclones of the same amplitude generated offshore. This indicates that eddies are in fact trapping and transporting coastal water offshore, resulting in an offshore POC enrichment of 20.9 ± 11 Gg year−1. This POC enrichment due to the coastally-generated eddies extends for 1000 km from shore. This analysis provides large-scale observational-based evidence that eddies play a quantitatively important role in the offshore transport of coastal water, substantially widening the area influenced by highly productive upwelled waters in the California Current System.

Suggested Citation

  • Caitlin M. Amos & Renato M. Castelao & Patricia M. Medeiros, 2019. "Offshore transport of particulate organic carbon in the California Current System by mesoscale eddies," Nature Communications, Nature, vol. 10(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-019-12783-5
    DOI: 10.1038/s41467-019-12783-5
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