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  • 2020-2024  (5)
  • 1980-1984  (3)
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  • 1
    Online Resource
    Online Resource
    Die Struktur mariner pelagischer Systeme : Ansätze zu einer Synthese von physikoçhemischen und biologischen Betrachtungsweisen (1985-)
    Kiel
    Details Availability
    Keywords: Hochschulschrift
    Type of Medium: Online Resource
    Edition: 2021
    Language: German , English
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  • 2
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    Annual cycle of sedimentation in relation to plankton ecology in western Kiel Bight (1980)
    Taylor & Francis
    In:  Ophelia, Suppl. 1 . pp. 65-76.
    Details
    Publication Date: 2019-02-27
    Description: The annual cycle of sedimentation in Kiel Bight is described from data collected over 3 years with multisample sediment traps. Settling matter was collected from 2 depths (15 and 18 m) in a 20 m water column at 2-4 day intervals. The pattern of sedimentation was alike each year, although considerable differences in the quantity collected were present. Resuspended sediment and primary settling matter originating from the pelagic system (phytoplankton cells, detritus) were the main contributors to the particulate material collected by the traps. High sedimentation rates from November to March were due to resuspended sediment. The composition of this material differed from that of bulk surface sediment due to the selective effect of water movement during resuspension. Peaks in sedimentation of primary material were observed in spring and autumn when the pelagic food web is poorly developed. From May to August sedimentation rates were low although this is the period of high primary production with large standing stocks of plankton. Apparently, organic substance produced here is consumed within the pelagic food web, as herbivore and carnivore populations are well developed and turnover time of particles is short. Sedimentation rates of primary material are estimated to be in the range of 50-65 g C · m-2 · yr-', but in reality year to year differences are probably greater than indicated by this range.
    Type: Article , PeerReviewed
    Format: text
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 3
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    The Plankton Tower. IV. Interactions Between Water Column and Sediment in Enclosure Experiments in Kiel Bight (1982)
    Springer-Verlag
    In:  In: Marine Mesocosms: Biological and Chemical Research in Experimental Ecosystems. , ed. by Grice, G. D. and Reeve, M. R. Springer-Verlag, New York, Heidelberg, Berlin, pp. 205-216.
    Details
    Publication Date: 2016-07-20
    Description: Neritic ecosystems in the boreal zone generally maintain more plankton biomass over a longer period of the year than off-shore systems in the same latitude. Productivity is higher particularly during the summer stratification, between the spring and autumn phytoplankton blooms brought about by nutrients from sources other than pelagic remineralization. Plankton biomass levels maintained by recycling within a pelagic system tend to decrease with time if limiting nutrients bound in sedimenting particles are not replenished. In neritic environments, surface waters can receive nutrients from the land, but depending on water depth and local weather and geomorphology, replenishment can also come from nutrient-rich subthermocline water and sediments. In deeper bodies of water with a steep coastline, such as fjords, the sediment contribution will be less important (Takahashi et al. 1977) than in shallow water systems with more of their sediment surface within the euphotic zone (von Bodungen et al. 1975, Rowe et al. 1975).
    Type: Book chapter , NonPeerReviewed
    Format: text
    DOI: 10.1007/978-1-4612-5645-8_15
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    OceanRep: Book chapter
  • 4
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    Growth and sedimentation of the phytoplankton spring bloom in the Borholm Sea (Baltic Sea) (1981)
    Institut für Meereskunde
    Details
    Publication Date: 2022-05-23
    Description: Results obtained from short-term (8 h to 24 h intervals) measurements of physical, chemical and biological properties of the 70 m water column from an anchor station in the Bornholm Sea over a 10-day period are presented and discussed. Phytoplankton biomass concentration and production rates indicated that the spring bloom was in progress in this period. The onset of the spring bloom occurred prior to the advent of thermal stratification. Peak growth rates, accompanied by nutrient depletion and biomass accumulation in surface layers, were concomitant with calm weather and a cloudless sky after which a part of the population was observed to sink out of the water column unimpeded by the permanent halocline. Maximum sinking rates of the dominant species, Skeletonema costatum, ranged between 30 to 50 m per day during this event. The development of the spring bloom apparently takes place in a series of events during which periods of low production alternate with periods of high production and rapid sedimentation of parts of the population.
    Type: Article , NonPeerReviewed
    Format: text
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    OceanRep: Article in a Scientific Journal - without review
  • 5
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    Pigments measured on water bottle samples during POLARSTERN cruise ANT-X/6 (2022)
    PANGAEA
    Details
    Publication Date: 2024-02-16
    Keywords: 19-Butanoyloxyfucoxanthin; 19-Hexanoyloxyfucoxanthin; Alloxanthin; ANT-X/6; Bottle number; Chlorophyll a; Chlorophyll a, epimer; Chlorophyll a, total; Chlorophyll a allomers; Chlorophyll b; Chlorophyll c1+c2; Chlorophyll c3; Chlorophyllide a; CTD/Rosette; CTD-RO; Date/Time of event; DEPTH, water; Diadinoxanthin; Elevation of event; Event label; Fucoxanthin; JGOFS; JGOFS AWI methods; Joint Global Ocean Flux Study; Latitude of event; Longitude of event; Peridinin; Pheophorbide a; Pheophytin a; Polarstern; Prasinoxanthin; PS22; PS22/870C2; PS22/872C1; PS22/874C1; PS22/879C3; PS22/882C1; PS22/887C2; PS22/891C2; PS22/893C2; PS22/895C1; PS22/897C1; PS22/899C1; PS22/901C2; PS22/903C1; PS22/905C1; PS22/907C2; PS22/909C1; PS22/912C1; PS22/914C1; PS22/915C1; PS22/916C1; PS22/918C1; PS22/919C1; PS22/920C1; PS22/921C1; PS22/930C1; PS22/931C1; PS22/933C1; PS22/934C1; PS22/938C1; PS22/939C1; PS22/940C1; PS22/941C1; PS22/943C1; PS22/945C1; PS22/947C1; PS22/949C2; PS22/952C1; PS22/953C1; PS22/955C1; PS22/956C1; PS22/957C1; PS22/958C1; PS22/959C1; PS22/960C1; PS22/961C1; PS22/962C1; PS22/963C1; PS22/964C1; PS22/965C1; PS22/966C1; PS22/968C1; PS22/969C1; Pyropheophorbide a; Pyropheophytin a; Sample ID; South Atlantic Ocean; Zeaxanthin + Lutein
    Type: Dataset
    Format: text/tab-separated-values, 6677 data points
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    DATA PANGAEA
  • 6
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    Concentrations of macronutrients, dissolved organic and inorganic compounds during the iron fertilization experiment EIFEX in 2004 (2023)
    PANGAEA
    Details
    Publication Date: 2024-05-11
    Description: Here we present the concentrations of inorganic nutrients, dissolved organic carbon, nitrogen and phophorus and dissolved inorganic carbon (DIC) from discrete water samples collected with a CTD-rosette during the European Iron Fertilization Experiment (EIFEX). The experiment was carried out from February 11 to March 20, 2004 in the 60-km diameter, rotating core of an eddy, formed by a meander of the Antarctic Polar Front (centred at around 49°10' S and 2°10' E). Samples were taken within the eddy inside and outside the fertilized patch, and in a few cases outside the eddy. Inorganic nutrients (silicate, phosphate, nitrate, nitrite and ammonium) were measured with a Technicon Autoanalyser II system using standard methods. Dissolved organic carbon (DOC) was determined by high temperature combustion using a TOC-VCPH/CPN (Shimadzu) according to Skoog et al. (1997). Dissolved organic nitrogen (DON) was measured on an Evolution continuous flow analyser (Alliance Instruments) after Valderrama (1981). Dissolved inorganic carbon was measured by coulometric titration (Johnson et al., 1987) using a SOMMA system with gas loop calibration with a reproducibility of 2 mmol/kg. DIC was calibrated against certified reference materials from Andrew Dickson at Scripps Institution of Oceanography (SIO).
    Keywords: Ammonium; ANT XXI/3; ANT-XXI/3; Auto-analyzer II, Technicon; Carbon, inorganic, dissolved; Carbon, organic, dissolved; Cast number; Continuous flow analyser, Alliance Instruments, Evolution; Method according to Valderrama (1981); Coulometric titration according to Johnson et al. (1987); CTD/Rosette; CTD-RO; DATE/TIME; DEPTH, water; dissolved in organic carbon (DIC); Dissolved Organic Matter; Duration, number of days; Event label; GOFLO; Go-Flo bottles; LATITUDE; LONGITUDE; Nitrate; Nitrite; Nitrogen, organic, dissolved; particulate organic matter; Phosphate; Polarstern; Position; PS65/424-3; PS65/424-8; PS65/426-1; PS65/427-1; PS65/452-1; PS65/464-1; PS65/466-2; PS65/470-1; PS65/471-1; PS65/508-16; PS65/508-2; PS65/509-1; PS65/509-13; PS65/511-1; PS65/511-9; PS65/513-3; PS65/513-5; PS65/514-2; PS65/514-6; PS65/515-1; PS65/516-1; PS65/517-1; PS65/518-1; PS65/519-1; PS65/520-1; PS65/521-1; PS65/522-1; PS65/523-1; PS65/524-1; PS65/525-1; PS65/526-1; PS65/527-1; PS65/528-1; PS65/529-1; PS65/530-1; PS65/531-1; PS65/532-1; PS65/533-1; PS65/534-1; PS65/535-1; PS65/536-1; PS65/537-1; PS65/538-1; PS65/539-1; PS65/540-1; PS65/541-1; PS65/543-10; PS65/543-14; PS65/543-15; PS65/543-8; PS65/544-11; PS65/544-14; PS65/544-18; PS65/544-24; PS65/544-29; PS65/544-35; PS65/544-42; PS65/544-48; PS65/544-5; PS65/544-53; PS65/544-56; PS65/544-60; PS65/544-63; PS65/544-7; PS65/544-9; PS65/545-1; PS65/546-14; PS65/546-2; PS65/546-5; PS65/553-10; PS65/553-3; PS65/553-5; PS65/559-1; PS65/570-11; PS65/570-2; PS65/570-4; PS65/570-7; PS65/572-1; PS65/573-1; PS65/574-1; PS65/580-10; PS65/580-2; PS65/580-4; PS65/580-6; PS65/581-1; PS65/583-1; PS65/584-1; PS65/585-1; PS65/587-1; PS65/587-10; PS65/587-3; PS65/588-1; PS65/591-1; PS65/591-3; PS65/592-1; PS65/593-12; PS65/593-3; PS65/593-6; PS65 EIFEX; Silicate; South Atlantic Ocean; Station label; Total organic carbon analyzer, Schimadzu, TOC-VCPH/CPN; HTCO method according to Skoog et al. (1997)
    Type: Dataset
    Format: text/tab-separated-values, 9707 data points
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    DATA PANGAEA
  • 7
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    Concentrations of chlorophyll a, phaeopigments, and particulate matter during the iron fertilization experiment EIFEX in 2004 (2023)
    PANGAEA
    Details
    Publication Date: 2024-05-11
    Description: Here we present concentrations of chlorophyll a, phaeopigments, particulate organic carbon and nitrogen from water samples collected at discrete depths with a CTD-rosette during the European Iron Fertilization Experiment (EIFEX). The experiment was carried out from February 11 to March 20, 2004 in the 60-km diameter, rotating core of an eddy, formed by a meander of the Antarctic Polar Front (centred at around 49°10' S and 2°10' E). Samples were taken within the eddy inside and outside the fertilized patch, and in a few cases outside the eddy.Chlorophyll concentrations were determined by fluorometry using a Turner Design Model 10-AU digital fluorometer. Sampling, measurements and calibration of the fluorometer was carried out following the JGOFS protocol procedure (Knap et al, 1996). Results of the fluorometer calibration diverged by 5% between beginning and end of the cruise. Chlorophyll a content was calculated using average parameter values from the two calibrations. Measurement uncertainty was estimated from triplicate water samples taken from depths ranging between 10 and 100 m depth and averaged 5% of measured values. Samples for particulate organic carbon and nitrogen (POC and PON) were filtered onto precombusted Whatman GF/F filters and processed following recommendations by Lorrain et al. (2003). Samples were measured independently on three different analysers: a CN2500 CHN Analyser (Thermo Finnigan MAT) coupled to a Delta+ mass spectrometer (Thermo Finnigan MAT) via Conflo II interface (Thermo Finnigan MAT), a Carlo-Erba NA-1500 Series II elemental analyzer coupled to a Finnegan Delta+ mass spectrometer and a Euro EA Elemental Analyser. Differences due to methods were within the range of measurement variability (below 2%). The particulate organic phosphorus (POP) content was determined colorimetrically using the method from Hansen and Koroleff (1999; measurement variability 4%). Biogenic silica (BSi) was measured following the wet alkaline digestion method according to Müller and Schneider (1993; measurement variability 2%).
    Keywords: ANT XXI/3; ANT-XXI/3; Biogenic silica; Carbon, organic, particulate; Cast number; Chlorophyll a; Colorimetry according to Hansen and Koroleff (1999); CTD/Rosette; CTD-RO; DATE/TIME; DEPTH, water; dissolved in organic carbon (DIC); Dissolved Organic Matter; Duration, number of days; Elemental analyzer; Decarbonation and preservation method according to Lorrain et al. (2003); Event label; Fluorometer, Turner Designs, 10-AU; According to Knap et al. (1996); LATITUDE; LONGITUDE; Nitrogen, organic, particulate; particulate organic matter; Phaeopigments; Phosphorus, organic, particulate; Polarstern; Position; PS65/424-3; PS65/426-1; PS65/427-1; PS65/452-1; PS65/464-1; PS65/466-2; PS65/470-1; PS65/474-1; PS65/508-2; PS65/509-1; PS65/511-1; PS65/513-3; PS65/514-2; PS65/515-1; PS65/516-1; PS65/518-1; PS65/519-1; PS65/520-1; PS65/521-1; PS65/522-1; PS65/523-1; PS65/524-1; PS65/525-1; PS65/526-1; PS65/527-1; PS65/528-1; PS65/529-1; PS65/530-1; PS65/533-1; PS65/534-1; PS65/535-1; PS65/536-1; PS65/537-1; PS65/538-1; PS65/539-1; PS65/540-1; PS65/541-1; PS65/543-10; PS65/544-11; PS65/544-14; PS65/544-15; PS65/544-18; PS65/544-20; PS65/544-24; PS65/544-26; PS65/544-29; PS65/544-3; PS65/544-32; PS65/544-35; PS65/544-42; PS65/544-48; PS65/544-5; PS65/544-53; PS65/544-56; PS65/544-7; PS65/544-9; PS65/545-1; PS65/546-2; PS65/553-3; PS65/555-1; PS65/556-1; PS65/557-1; PS65/558-1; PS65/559-1; PS65/560-2; PS65/561-1; PS65/562-2; PS65/563-1; PS65/564-1; PS65/565-1; PS65/570-4; PS65/572-1; PS65/573-1; PS65/580-2; PS65/581-1; PS65/586-3; PS65/587-1; PS65/588-1; PS65/591-1; PS65/592-1; PS65/593-3; PS65 EIFEX; South Atlantic Ocean; Station label; Wet alkaline digestion method according to Müller and Schneider (1993)
    Type: Dataset
    Format: text/tab-separated-values, 5554 data points
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    DATA PANGAEA
  • 8
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    Rectifying misinformation on the climate intervention potential of ocean afforestation (2024)
    Springer Nature
    In:  EPIC3Nature Communications, Springer Nature, 15(1), pp. 3012-3012, ISSN: 2041-1723
    Details
    Publication Date: 2024-04-19
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , peerRev
    Format: application/pdf
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    PAPER (OA)
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