Seasonal development of mixed layer depths, nutrients, chlorophyll and Calanus finmarchicus in the Norwegian Sea - A basin-scale habitat comparison

Handle URI:
http://hdl.handle.net/10754/562302
Title:
Seasonal development of mixed layer depths, nutrients, chlorophyll and Calanus finmarchicus in the Norwegian Sea - A basin-scale habitat comparison
Authors:
Bagøien, Espen; Melle, Webjørn; Kaartvedt, Stein ( 0000-0002-8793-2948 )
Abstract:
Seasonal patterns for mixed layer depths, nutrients, chlorophyll, and Calanus finmarchicus in different water masses between 62 and 70°N of the Norwegian Sea were compared using spatiotemporally aggregated basin-scale data. Norwegian Coastal Water was stratified throughout the year due to a low-salinity upper layer. The winter mixed layer depth was typically about 50-60m, and the spring phytoplankton bloom peaked in late April. In Atlantic and Arctic Waters the winter mixed layer depths were much greater, typically about 175-250m. Due to the requirement for thermal stratification, the phytoplankton build-ups there were slower and the peaks were delayed until late May. Seasonal development of mixed layer depths, nutrient consumption and chlorophyll was similar for the Atlantic and Arctic areas. Young Calanus copepodites of the first new generation in Coastal Water peaked in early May, preceding the peak in Atlantic Water by about 2weeks, and that in Arctic Water by about 6weeks. While the young G 1 cohorts in Coastal and Atlantic waters coincided rather well in time with the phytoplankton blooms, the timing of the cohort in Arctic Water was delayed compared to the phytoplankton. Two or more Calanus generations in Coastal Water, and two generations in Atlantic Water were observed. Only one generation was found in Arctic Water, where scarce autumn data precludes evaluation of a possible second generation. © 2012 Elsevier Ltd.
KAUST Department:
Red Sea Research Center (RSRC); Biological and Environmental Sciences and Engineering (BESE) Division
Publisher:
Elsevier BV
Journal:
Progress in Oceanography
Issue Date:
Sep-2012
DOI:
10.1016/j.pocean.2012.04.014
Type:
Article
ISSN:
00796611
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.authorBagøien, Espenen
dc.contributor.authorMelle, Webjørnen
dc.contributor.authorKaartvedt, Steinen
dc.date.accessioned2015-08-03T10:00:04Zen
dc.date.available2015-08-03T10:00:04Zen
dc.date.issued2012-09en
dc.identifier.issn00796611en
dc.identifier.doi10.1016/j.pocean.2012.04.014en
dc.identifier.urihttp://hdl.handle.net/10754/562302en
dc.description.abstractSeasonal patterns for mixed layer depths, nutrients, chlorophyll, and Calanus finmarchicus in different water masses between 62 and 70°N of the Norwegian Sea were compared using spatiotemporally aggregated basin-scale data. Norwegian Coastal Water was stratified throughout the year due to a low-salinity upper layer. The winter mixed layer depth was typically about 50-60m, and the spring phytoplankton bloom peaked in late April. In Atlantic and Arctic Waters the winter mixed layer depths were much greater, typically about 175-250m. Due to the requirement for thermal stratification, the phytoplankton build-ups there were slower and the peaks were delayed until late May. Seasonal development of mixed layer depths, nutrient consumption and chlorophyll was similar for the Atlantic and Arctic areas. Young Calanus copepodites of the first new generation in Coastal Water peaked in early May, preceding the peak in Atlantic Water by about 2weeks, and that in Arctic Water by about 6weeks. While the young G 1 cohorts in Coastal and Atlantic waters coincided rather well in time with the phytoplankton blooms, the timing of the cohort in Arctic Water was delayed compared to the phytoplankton. Two or more Calanus generations in Coastal Water, and two generations in Atlantic Water were observed. Only one generation was found in Arctic Water, where scarce autumn data precludes evaluation of a possible second generation. © 2012 Elsevier Ltd.en
dc.publisherElsevier BVen
dc.titleSeasonal development of mixed layer depths, nutrients, chlorophyll and Calanus finmarchicus in the Norwegian Sea - A basin-scale habitat comparisonen
dc.typeArticleen
dc.contributor.departmentRed Sea Research Center (RSRC)en
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Divisionen
dc.identifier.journalProgress in Oceanographyen
dc.contributor.institutionInstitute of Marine Research, P.O. Box 1870, Nordnes, N-5817 Bergen, Norwayen
dc.contributor.institutionUniversity of Oslo, Department of Biology, P.O. Box 1066, Blindern, 0316 Oslo, Norwayen
kaust.authorKaartvedt, Steinen
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