Satellite-derived spatial and temporal biological variability in the Cyprus Eddy

Groom, S; Herut, B; Brenner, S; Zodiatis, G; Psarra, S; Kress, N; Krom, MD; Law, CS; Drakopoulos, P

dc.contributor.author	Groom, S	en
dc.contributor.author	Herut, B	en
dc.contributor.author	Brenner, S	en
dc.contributor.author	Zodiatis, G	en
dc.contributor.author	Psarra, S	en
dc.contributor.author	Kress, N	en
dc.contributor.author	Krom, MD	en
dc.contributor.author	Law, CS	en
dc.contributor.author	Drakopoulos, P	en
dc.date.accessioned	2014-03-01T01:54:30Z
dc.date.available	2014-03-01T01:54:30Z
dc.date.issued	2005	en
dc.identifier.issn	09670645	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/27414
dc.subject	Chlorophyll-a	en
dc.subject	Cyprus Eddy	en
dc.subject	Ocean colour	en
dc.subject	Phosphate addition	en
dc.subject	Remote sensing	en
dc.subject	SeaWiFS	en
dc.subject.other	Approximation theory	en
dc.subject.other	Database systems	en
dc.subject.other	Phosphorus	en
dc.subject.other	Satellites	en
dc.subject.other	Sensors	en
dc.subject.other	Biological variability	en
dc.subject.other	Dust deposition	en
dc.subject.other	Satellite sensors	en
dc.subject.other	Oceanography	en
dc.subject.other	biological production	en
dc.subject.other	chlorophyll a	en
dc.subject.other	ocean color	en
dc.subject.other	phosphate	en
dc.subject.other	remote sensing	en
dc.subject.other	SeaWiFS	en
dc.subject.other	Mediterranean Sea	en
dc.subject.other	Mediterranean Sea (East)	en
dc.subject.other	algae	en
dc.title	Satellite-derived spatial and temporal biological variability in the Cyprus Eddy	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.dsr2.2005.08.019	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.dsr2.2005.08.019	en
heal.publicationDate	2005	en
heal.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. © 2005 Elsevier Ltd. All rights reserved.	en
heal.journalName	Deep-Sea Research Part II: Topical Studies in Oceanography	en
dc.identifier.doi	10.1016/j.dsr2.2005.08.019	en
dc.identifier.volume	52	en
dc.identifier.issue	22-23	en
dc.identifier.spage	2990	en
dc.identifier.epage	3010	en