Enhancing the comprehension of mixed layer depth control on the Mediterranean phytoplankton phenology
| Type | : | ACL |
|---|---|---|
| Nature | : | Production scientifique |
| Au bénéfice du Laboratoire | : | Oui |
| Statut de publication | : | Publié |
| Année de publication | : | 2013 |
| Auteurs (9) | : | LAVIGNE Héloïse D'ORTENZIO Fabrizio MIGON Christophe CLAUSTRE Herve TESTOR Pierre RIBERA D'ALCALÀ Maurizio LAVEZZA Rosario HOUPERT Loic PRIEUR Louis |
| Revue scientifique | : | Journal of Geophysical Research-Oceans |
| Volume | : | 118 |
| Fascicule | : | 7 |
| Pages | : | 3416-3430 |
| DOI | : | 10.1002/jgrc.20251 |
| URL | : | <go to isi>://wos:000324885400012 |
| Abstract | : | Phytoplankton phenology is primarily affected by physical forcing. However, its quantification is far from being completely understood. Among the physical forcing factors, the mixed layer depth (MLD) is considered to have the strongest impact on phytoplankton dynamics, and consequently, on their phenology. The role of MLD variations in shaping the phytoplankton phenology was explored in the Mediterranean Sea, a basin displaying contrasting phenological regimes. A database of MLD estimations was merged with ocean color chlorophyll concentrations ([Chl](SAT)) to generate concomitant annual MLD and [Chl](SAT) cycles. Several indices were calculated to quantitatively analyze these cycles. The relevance of indices summarizing the temporal difference between main characteristics of MLD and [Chl](SAT) cycles was emphasized. As previously observed, two dominant phenological regimes coexist in the Mediterranean Sea. The first is marked by a typical spring bloom, as in temperate regions. The second displays a low seasonality and an absence of an intense [Chl](SAT) peak as in subtropical areas. The MLD is shown to play a key role in determining the dominant phenological regime in a given area. Results also show that regions having low seasonality display concomitant MLD and [Chl](SAT) maxima, whereas [Chl](SAT) peaks are generally observed 30 days after MLD peaks in regions with strongest seasonality. Over the whole basin, [Chl](SAT) increase starts 1 month after the initiation of MLD deepening. Finally, after examining the impact of MLD on light and nutrient availability for phytoplankton, mechanisms were proposed to explain the time lags between MLD and [Chl](SAT) increase and MLD and [Chl](SAT) maxima. |
| Mots-clés | : | - |
| Commentaire | : | Times Cited: 2 Testor, Pierre/M-4564-2014 2 |
| Tags | : | GROOM NAOS SESAME |
| Fichier attaché | : | - |
| Citation | : |
Lavigne H, D'Ortenzio F, Migon C, Claustre H, Testor P, Ribera d'Alcalà M, Lavezza R, Houpert L, Prieur L (2013) Enhancing the comprehension of mixed layer depth control on the Mediterranean phytoplankton phenology. J Geophys Res-Oceans 118: 3416-3430 | doi: 10.1002/jgrc.20251
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