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Global Distribution of Non-algal Particles From Ocean Color Data and Implications for Phytoplankton Biomass Detection

TitoloGlobal Distribution of Non-algal Particles From Ocean Color Data and Implications for Phytoplankton Biomass Detection
Tipo di pubblicazioneArticolo su Rivista peer-reviewed
Anno di Pubblicazione2018
AutoriBellacicco, M., Volpe G., Briggs N., Brando V., Pitarch J., Landolfi A., Colella S., Marullo S., and Santoleri R.
RivistaGeophysical Research Letters
Volume45
Paginazione7672-7682
ISSN00948276
Parole chiaveAlgae, Backscattering, Backscattering coefficients, Biomass, Chlorophyll, Global distribution, global ocean, Heterotrophic bacterias, Ocean color, Ocean currents, Phytoplankton, Phytoplankton biomass, Satellites, Subtropical Gyre, Upwelling regimes, Viruses
Abstract

In the last few decades, phytoplankton biomass has been commonly studied from space. However, satellite analysis of non-algal particles (NAPs), including heterotrophic bacteria and viruses, is relatively recent. In this work, we estimate the backscattering coefficient associated with the NAP fraction that does not covary with chlorophyll based on satellite particulate backscattering coefficient and chlorophyll (bbpNAP). bbpNAP is computed at 100-km resolution using 19 years of monthly satellite data. We find clear differences in bbpNAP between northern and southern oceans. High bbpNAP values are found in the Arctic and Southern Oceans, the North Atlantic area influenced by the Gulf Stream current, as well as shelf regions (i.e., Patagonian shelf) affected by upwelling regimes. Low correlation between chlorophyll and backscattering prevents precise bbpNAP estimations in oligotrophic areas (e.g., subtropical gyres). These bbpNAP estimations lead to a reduction to half in satellite-based phytoplankton biomass estimates respect to previously published results. ©2018. The Authors.

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URLhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85052603666&doi=10.1029%2f2018GL078185&partnerID=40&md5=c1c6834b9c23868bde41f8ad57d25cf5
DOI10.1029/2018GL078185
Citation KeyBellacicco20187672