Physical Mechanisms Routing Nutrients in the Central Red Sea

Handle URI:
http://hdl.handle.net/10754/625871
Title:
Physical Mechanisms Routing Nutrients in the Central Red Sea
Authors:
Zarokanellos, Nikolaos; Kürten, Benjamin ( 0000-0003-0328-7847 ) ; Churchill, James H.; Roder, Cornelia; Voolstra, Christian R. ( 0000-0003-4555-3795 ) ; Abualnaja, Yasser; Jones, Burton ( 0000-0002-9599-1593 )
Abstract:
Mesoscale eddies and boundary currents play a key role in the upper layer circulation of the Red Sea. This study assesses the physical and biochemical characteristics of an eastern boundary current (EBC) and recurrent eddies in the central Red Sea (CRS) using a combination of in situ and satellite observations. Hydrographic surveys in November 2013 (autumn) and in April 2014 (spring) in the CRS (22.15 − 24.1°N) included a total of 39 and 27 CTD stations, respectively. In addition, high-resolution hydrographic data were acquired in spring 2014 with a towed undulating vehicle (ScanFish). In situ measurements of salinity, temperature, chlorophyll fluorescence, colored dissolved organic matter (CDOM), and dissolved nitrate: phosphorous ratios reveal distinct water mass characteristics for the two periods. An EBC, observed in the upper 150 m of the water column during autumn, transported low-salinity and warm water from the south toward the CRS. Patches of the low-salinity water of southern origin tended to contain relatively high concentrations of chlorophyll and CDOM. The prominent dynamic feature observed in spring was a cyclonic/anticyclonic eddy pair. The cyclonic eddy was responsible for an upward nutrient flux into the euphotic zone. Higher chlorophyll and CDOM concentrations, and concomitant lower nitrate:phosphorous ratios indicate the influence of the EBC in the CRS at the end of the stratified summer period.
KAUST Department:
Biological and Environmental Sciences and Engineering (BESE) Division; Red Sea Research Center (RSRC)
Citation:
Zarokanellos ND, Kürten B, Churchill JH, Roder C, Voolstra CR, et al. (2017) Physical Mechanisms Routing Nutrients in the Central Red Sea. Journal of Geophysical Research: Oceans. Available: http://dx.doi.org/10.1002/2017jc013017.
Publisher:
Wiley-Blackwell
Journal:
Journal of Geophysical Research: Oceans
Issue Date:
6-Oct-2017
DOI:
10.1002/2017jc013017
Type:
Article
ISSN:
2169-9275
Sponsors:
Research reported in this publication was supported by the King Abdullah University of Science and Technology (KAUST). Hydrographic data obtained from both cruises can be obtained from Burton H. Jones (KAUST) and Nikolaos D. Zarokanellos (KAUST). The authors gratefully acknowledge the Core Marine Operation Research Lab (CMOR) for their support during the cruises. Special thanks go to Ioannis Georgakakis, Y. V. B. Sarma and Mohammedali Nellayaputhenpeedika for their technical support during the cruises. Also, we thank the captain and crew of R/V Thuwal for their valued help during the Eddy Shelf Expedition. The SLA was obtained from AVISO and the ocean color products were produced by NASA Ocean Color Group; satellite data are available online through the official websites documented in section 2. We thank Ian Walsh and an anonymous reviewer for their valuable comments and suggestions.
Additional Links:
http://onlinelibrary.wiley.com/doi/10.1002/2017JC013017/full
Appears in Collections:
Articles; Red Sea Research Center (RSRC); Biological and Environmental Sciences and Engineering (BESE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorZarokanellos, Nikolaosen
dc.contributor.authorKürten, Benjaminen
dc.contributor.authorChurchill, James H.en
dc.contributor.authorRoder, Corneliaen
dc.contributor.authorVoolstra, Christian R.en
dc.contributor.authorAbualnaja, Yasseren
dc.contributor.authorJones, Burtonen
dc.date.accessioned2017-10-17T08:48:35Z-
dc.date.available2017-10-17T08:48:35Z-
dc.date.issued2017-10-06en
dc.identifier.citationZarokanellos ND, Kürten B, Churchill JH, Roder C, Voolstra CR, et al. (2017) Physical Mechanisms Routing Nutrients in the Central Red Sea. Journal of Geophysical Research: Oceans. Available: http://dx.doi.org/10.1002/2017jc013017.en
dc.identifier.issn2169-9275en
dc.identifier.doi10.1002/2017jc013017en
dc.identifier.urihttp://hdl.handle.net/10754/625871-
dc.description.abstractMesoscale eddies and boundary currents play a key role in the upper layer circulation of the Red Sea. This study assesses the physical and biochemical characteristics of an eastern boundary current (EBC) and recurrent eddies in the central Red Sea (CRS) using a combination of in situ and satellite observations. Hydrographic surveys in November 2013 (autumn) and in April 2014 (spring) in the CRS (22.15 − 24.1°N) included a total of 39 and 27 CTD stations, respectively. In addition, high-resolution hydrographic data were acquired in spring 2014 with a towed undulating vehicle (ScanFish). In situ measurements of salinity, temperature, chlorophyll fluorescence, colored dissolved organic matter (CDOM), and dissolved nitrate: phosphorous ratios reveal distinct water mass characteristics for the two periods. An EBC, observed in the upper 150 m of the water column during autumn, transported low-salinity and warm water from the south toward the CRS. Patches of the low-salinity water of southern origin tended to contain relatively high concentrations of chlorophyll and CDOM. The prominent dynamic feature observed in spring was a cyclonic/anticyclonic eddy pair. The cyclonic eddy was responsible for an upward nutrient flux into the euphotic zone. Higher chlorophyll and CDOM concentrations, and concomitant lower nitrate:phosphorous ratios indicate the influence of the EBC in the CRS at the end of the stratified summer period.en
dc.description.sponsorshipResearch reported in this publication was supported by the King Abdullah University of Science and Technology (KAUST). Hydrographic data obtained from both cruises can be obtained from Burton H. Jones (KAUST) and Nikolaos D. Zarokanellos (KAUST). The authors gratefully acknowledge the Core Marine Operation Research Lab (CMOR) for their support during the cruises. Special thanks go to Ioannis Georgakakis, Y. V. B. Sarma and Mohammedali Nellayaputhenpeedika for their technical support during the cruises. Also, we thank the captain and crew of R/V Thuwal for their valued help during the Eddy Shelf Expedition. The SLA was obtained from AVISO and the ocean color products were produced by NASA Ocean Color Group; satellite data are available online through the official websites documented in section 2. We thank Ian Walsh and an anonymous reviewer for their valuable comments and suggestions.en
dc.publisherWiley-Blackwellen
dc.relation.urlhttp://onlinelibrary.wiley.com/doi/10.1002/2017JC013017/fullen
dc.rightsArchived with thanks to Journal of Geophysical Research: Oceansen
dc.titlePhysical Mechanisms Routing Nutrients in the Central Red Seaen
dc.typeArticleen
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Divisionen
dc.contributor.departmentRed Sea Research Center (RSRC)en
dc.identifier.journalJournal of Geophysical Research: Oceansen
dc.eprint.versionPost-printen
dc.contributor.institutionDepartment of Physical Oceanography; Woods Hole Oceanographic Institution; Woods Hole Massachusetts USAen
dc.contributor.institutionAlfred-Wegener-Institute, Helmholtz Center for Polar and Marine Research, Section of Shelf Sea System Ecology; 27498 Helgoland Germanyen
kaust.authorZarokanellos, Nikolaosen
kaust.authorKürten, Benjaminen
kaust.authorRoder, Corneliaen
kaust.authorVoolstra, Christian R.en
kaust.authorAbualnaja, Yasseren
kaust.authorJones, Burtonen
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