Groom, S., Herut, B., Brenner, S. et al. (6 more authors) (2005) Satellite-derived spatial and temporal biological variability in the Cyprus Eddy. Deep Sea Research Part II : Tropical Studies in Oceanography, 52 (22-23). pp. 2990-3010. ISSN 0967-0645
Abstract
The cycling of phosphorus in the Mediterranean (CYCLOPS) team investigated phosphate limitation in the Eastern Mediterranean and conducted a phosphate addition experiment in 2002 at the centre of an anticyclonic eddy south of Cyprus. The 2002 and other cruises generated a small database of chlorophyll-a (chl-a) profiles that enabled investigation of the performance of a variety of standard and regional bio-optical algorithms for remote sensing retrievals of chl-a in the region. The standard SeaWiFS OC4V4 and MODIS chlor_a2 algorithms overestimated chl-a as previously reported while a regional algorithm proposed by Bricaud et al. [2002. Algal biomass and sea surface temperature in the Mediterranean basin: intercomparison of data from various satellite sensors, and implications for primary production estimates. Remote Sensing Environment 81, 163–178] and the semi-analytical MODIS chlor_a3 gave improved retrievals. SeaWiFS mean chl-a maps are presented for the Eastern Mediterranean for each month between September 1997 and August 2004 and as multi-annual “climatological” images. The former showed that chl-a in the region decreased over the duration of the time series with reductions in the centre of the eddy, tracked using a quasi-Lagrangian approach, of approximately 33% between 1997 and 1998 and 2002 and 2003. This was not correlated with deep winter mixing represented as heat loss from the sea-surface or dust deposition represented as daily EP-TOMS aerosol index and annual aluminium deposition on the Israeli coast. It is hypothesised that the variations in chl-a are partly a function of the eddy dynamics. Daily SeaWiFS observations show that the 2002 phosphate release was conducted at a period of decreasing chl-a between the winter maximum and summer oligotrophic conditions; however, the rate of seasonal decrease was less than that observed in situ during the week following the phosphate release.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | Copyright © 2005 Elsevier Ltd. |
Keywords: | remote sensing, ocean colour, SeaWiFS, phosphate addition, chlorophyll-a, Cyprus Eddy |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Environment (Leeds) > School of Earth and Environment (Leeds) The University of Leeds > Faculty of Environment (Leeds) > Earth and Biosphere Institute (Leeds) |
Depositing User: | Repository Officer |
Date Deposited: | 10 Nov 2006 |
Last Modified: | 18 Jun 2015 17:23 |
Published Version: | http://dx.doi.org/10.1016/j.dsr2.2005.08.019 |
Status: | Published |
Publisher: | Elsevier |
Refereed: | Yes |
Identification Number: | 10.1016/j.dsr2.2005.08.019 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:1705 |