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Global variability of optical backscattering by non‐algal particles from a biogeochemical‐argo data set
Bellacicco, M.; Cornec, M.; Organelli, E.; Brewin, R.J.W.; Neukermans, G.; Volpe, G.; Barbieux, M.; Poteau, A.; Schmechtig, C.; D'Ortenzio, F.; Marullo, S.; Claustre, H.; Pitarch, J. (2019). Global variability of optical backscattering by non‐algal particles from a biogeochemical‐argo data set. Geophys. Res. Lett. 46(16): 9767-9776. https://dx.doi.org/10.1029/2019gl084078
In: Geophysical Research Letters. American Geophysical Union: Washington. ISSN 0094-8276; e-ISSN 1944-8007, meer
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| Author keywords |
non-algal particles; optical backscattering; global ocean; BGC-Argo float |
| Auteurs | | Top |
- Bellacicco, M.
- Cornec, M.
- Organelli, E.
- Brewin, R.J.W.
- Neukermans, G., meer
|
- Volpe, G.
- Barbieux, M.
- Poteau, A.
- Schmechtig, C.
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- D'Ortenzio, F.
- Marullo, S.
- Claustre, H.
- Pitarch, J., meer
|
| Abstract |
Understanding spatial and temporal dynamics of non‐algal particles in open ocean is of the utmost importance to improve estimations of carbon export and sequestration. These particles covary with phytoplankton abundance but also accumulate independently of algal dynamics. The latter likely represents an important fraction of organic carbon, but it is largely overlooked. A possible way to study these particles is via their optical backscattering properties (bbp) and relationship with chlorophyll‐a (Chl). To this aim, we estimate the fraction of bbp associated with the non‐algal particle portion ( ) that does not covary with Chl by using a global Biogeochemical‐Argo data set. We quantify the spatial, temporal, and vertical variability of . In the northern productive areas, is a small fraction of bbp and shows a clear seasonal cycle. In the Southern Ocean, bkbp is a major fraction of total bbp. In oligotrophic areas, has a smooth annual cycle. |
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