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Seasonal to interannual phytoplankton response to physical processes in the Mediterranean Sea from satellite observations

Record type: Article

The relation between physical and biological processes affecting the Mediterranean Sea surface layer was investigated through univariate Empirical Orthogonal Function (EOF) decompositions of remotely sensed chlorophyll-a (CHL), sea surface temperature (SST) and Mediterranean Absolute Dynamic Topography (MADT) weekly time series (1998–2006). As part of the analysis, the Data INterpolating Empirical Orthogonal Functions (DINEOF) technique was successfully applied to CHL images. Results from the single EOFs, along with a cross-correlation analysis, identified physical–biological interactions at both short (weeks to months) and long (years) temporal scales, and from meso- to basin-scales. Phytoplankton biomass abundance and the sea surface thermal stratification show a strong inverse relationship at seasonal and sub-basin scales. At a regional scale, the spring bloom space–time variability is related to the intensity and spatial extent of the deep water formation process and especially to its pre-conditioning phase. At interannual and sub-basin scales, a gradual decline of the phytoplankton biomass in the whole central Mediterranean occurs with a delay of one year relative to the decrease of the cyclonic circulation in the eastern basin, and the northward displacement of the Algerian current. Regionally, the phytoplankton biomass and the surface heat content anomalies associated with extreme atmospheric anomalies (such as the cold 1998–1999 winter and the summer 2003 heat wave) show a significant correlation with a ~ 5-month time lag.

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Citation

Volpe, Gianluca, Nardelli, Bruno Buongiorno, Cipollini, Paolo, Santoleri, Rosalia and Robinson, Ian S. (2012) Seasonal to interannual phytoplankton response to physical processes in the Mediterranean Sea from satellite observations Remote Sensing of Environment, 117, pp. 223-235. (doi:10.1016/j.rse.2011.09.020).

More information

Published date: 15 February 2012
Keywords: Satellite observations, EOF, Space–time variability, Phytoplankton, SST, Sea level, Mediterranean Sea
Organisations: Physical Oceanography, Marine Physics and Ocean Climate

Identifiers

Local EPrints ID: 336366
URI: http://eprints.soton.ac.uk/id/eprint/336366
ISSN: 0034-4257
PURE UUID: 2e20153e-6078-4a96-bf04-bd04ac7dad3a

Catalogue record

Date deposited: 22 Mar 2012 09:47
Last modified: 18 Jul 2017 06:08

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Contributors

Author: Gianluca Volpe
Author: Bruno Buongiorno Nardelli
Author: Paolo Cipollini
Author: Rosalia Santoleri
Author: Ian S. Robinson

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