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  • 1
    Electronic Resource
    Electronic Resource
    Carbon cycle Marine manipulations (2007)
    [s.l.] : Nature Publishing Group
    Nature 450 (2007), S. 491-492 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Marine phytoplankton are major players in the carbon cycle, accounting for about 50% of the global biological uptake of carbon dioxide. Near the ocean surface, these single-celled organisms use light energy to convert CO2 into organic molecules for building cellular structures and ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/450491a
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Marine microorganisms and global nutrient cycles (2005)
    [s.l.] : Nature Publishing Group
    Nature 437 (2005), S. 349-355 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The way that nutrients cycle through atmospheric, terrestrial, oceanic and associated biotic reservoirs can constrain rates of biological production and help structure ecosystems on land and in the sea. On a global scale, cycling of nutrients also affects the concentration of atmospheric carbon ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/nature04159
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Agricultural runoff fuels large phytoplankton blooms in vulnerable areas of the ocean (2005)
    [s.l.] : Macmillian Magazines Ltd.
    Nature 434 (2005), S. 211-214 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Biological productivity in most of the world's oceans is controlled by the supply of nutrients to surface waters. The relative balance between supply and removal of nutrients—including nitrogen, iron and phosphorus—determines which nutrient limits phytoplankton growth. ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/nature03370
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    Paper (German National Licenses)
    Fulltext
  • 4
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    (Table 3) Barium barite and excess comparison, accumulation rates and productivity from surface sediments (2003)
    PANGAEA
    In:  Supplement to: Eagle, Meagan; Paytan, Adina; Arrigo, Kevin R; van Dijken, Gert L; Murray, Richard W (2003): A comparison between excess barium and barite as indicators of carbon export. Paleoceanography, 18(1), 1021, https://doi.org/10.1029/2002PA000793
    Details
    Publication Date: 2023-12-12
    Description: Since Dymond et al. (1992, doi:10.1029/92PA00181) proposed the paleoproductivity algorithm based on “Bio-Ba”, which relies on a strong correlation between Ba and organic carbon fluxes in sediment traps, this proxy has been applied in many paleoproductivity studies. Barite, the main carrier of particulate barium in the water column and the phase associated with carbon export, has also been suggested as a reliable paleoproductivity proxy in some locations. We demonstrate that Ba(excess) (total barium minus the fraction associated with terrigenous material) frequently overestimates Ba(barite) (barium associated with the mineral barite), most likely due to the inclusion of barium from phases other than barite and terrigenous silicates (e.g., carbonate, organic matter, opal, Fe-Mn oxides, and hydroxides). A comparison between overlying oceanic carbon export and carbon export derived from Ba(excess) shows that the Dymond et al. (1992) algorithm frequently underestimates carbon export but is still a useful carbon export indicator if all caveats are considered before the algorithm is applied. Ba(barite) accumulation rates from a wide range of core top sediments from different oceanic settings are highly correlated to surface ocean 14C and Chlorophyll a measurements of primary production. This relationship varies by ocean basin, but with the application of the appropriate f ratio to 14C and Chlorophyll a primary production estimates, the plot of Ba(barite) accumulation and carbon export for the equatorial Pacific, Atlantic, and Southern Ocean converges to a global relationship that can be used to reconstruct paleo carbon export.
    Keywords: 11031802 Spadecore1; 11080400 Spadecore2; 11110100 Spadecore3; 11182336 Multicorer14; 11212105 Multicorer17; 11230530 Multicorer18; 11270742 Multicorer22; 11290827 Multicorer25; 12052336 Multicorer35; Accumulation rate per year; Agulhas Ridge; Aluminium; ANT-XI/2; Barium; Barium, flux; Barium/PP (Dymond et al 1992); Barium barite/barium excess ratio; Barium excess; Barium excess, flux; Barium in barite; BC; Box corer; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; Equatorial Pacific; ERDC; ERDC-088BX; ERDC-125BX; Event label; Export production; f-Ratio; GC; Gravity corer; INMD; INMD-106BX; K7905-21BC; MANOP; Melville; MUC; MultiCorer; Nathaniel B. Palmer; NBP9802; NBP9802-03; NBP9802-04; NBP9802-05; NBP9802-06; NBP9802-07; NBP9802-08; NBP9802-09; PC; Piston corer; PLDS-081BX; PLDS-107BX; PLDS-3; Pleiades; PLTO03MV; PLUTO-2-25; PLUTO-3; Polarstern; Primary production of carbon per area, yearly; PS2489-4; PS2493-3; PS2498-2; PS2499-1; PS28; PS28/256; PS28/280; PS28/304; PS28/314; RC24; RC24-8GC; Robert Conrad; Sample code/label; South Atlantic; South Pacific Ocean; Spade box corer; Thomas G. Thompson; Thomas Washington; TN057; TNO57-10; TNO57-13; TT013; TT013_104; TT013_113; TT013_143; TT013_20; TT013_35; TT013_6; TT013_69; TT013_82; TT013_88; V30; V30-41; VEGBOXC; Vema; W7706; W7706-44; Wecoma
    Type: Dataset
    Format: text/tab-separated-values, 700 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 5
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    (Table 2) Surface water properties of sampling sites in the Amundsen Sea (2012)
    PANGAEA
    Details
    Publication Date: 2023-12-12
    Keywords: Amundsen Sea; Area/locality; Density, sigma, in situ; Density, standard deviation; Depth, bottom/max; Depth, relative; Depth, top/min; DEPTH, water; Depth of the euphotic zone; DynaLiFe; Light attenuation coefficient; Mixed layer depth; Nathaniel B. Palmer; NBP0901; NBP0901_var; Radiation, photosynthetically active, standard deviation; Radiation, photosynthetically active per day; Salinity, standard deviation; Sample amount; Sea surface salinity, summer; Sea surface temperature, standard deviation; Sea surface temperature, summer; Standard deviation; Water sample; WS
    Type: Dataset
    Format: text/tab-separated-values, 100 data points
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    DATA PANGAEA
  • 6
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    (Table 4) Phytoplankton community composition of surface waters in the Amundsen Sea (2012)
    PANGAEA
    Details
    Publication Date: 2023-12-12
    Keywords: Amundsen Sea; Area/locality; Cryptophyta; Depth, bottom/max; Depth, top/min; DEPTH, water; Diatoms; DynaLiFe; Green algae; Maximum photochemical quantum yield of photosystem II; Maximum photochemical quantum yield of photosystem II, standard deviation; Nathaniel B. Palmer; NBP0901; NBP0901_var; Phaeocystis antarctica; Phaeocystis spp.; Sample amount; Standard deviation; Water sample; WS
    Type: Dataset
    Format: text/tab-separated-values, 80 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 7
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    (Table 5) Phytoplankton photosynthesis characteristics in surface waters of the Amundsen Sea (2012)
    PANGAEA
    Details
    Publication Date: 2023-12-12
    Keywords: Amundsen Sea; Area/locality; Assimilation rate of carbon per chlorophyll a; Depth, bottom/max; Depth, top/min; DEPTH, water; DynaLiFe; Nathaniel B. Palmer; NBP0901; NBP0901_var; Quantum yield; Quantum yield, standard deviation; Sample amount; Saturation light intensity; Slope; Standard deviation; Water sample; WS
    Type: Dataset
    Format: text/tab-separated-values, 42 data points
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    DATA PANGAEA
  • 8
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    (Table 6) Chlorophyll a uptake, nitrate uptake and export, and primary production rates in the Amundsen Sea (2012)
    PANGAEA
    Details
    Publication Date: 2023-12-12
    Keywords: Amundsen Sea; Area/locality; Chlorophyll a, areal concentration; Chlorophyll a, standard deviation; DynaLiFe; Nathaniel B. Palmer; NBP0901; NBP0901_var; Nitrate, integrated; Nitrate, standard deviation; Primary production of carbon, standard deviation; Primary production of carbon per area, daily; Sample amount; Water sample; WS
    Type: Dataset
    Format: text/tab-separated-values, 63 data points
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  • 9
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    (Table 1) Concentration of iron, DIP and silicic acid in water samples taken during Nathaniel B. Palmer cruises NBP06-01 and NBP06-08 (CORSACS I+II), Ross Sea (2011)
    PANGAEA
    In:  Supplement to: Sedwick, Peter; Marsay, Christopher M; Sohst, Bettina M; Aguilar-Islas, Ana M; Lohan, Maeve C; Long, Matthew C; Arrigo, Kevin R; Dunbar, Robert B; Saito, Mak A; Smith, Walker O Jr; DiTullio, Giacomo R (2011): Early season depletion of dissolved iron in the Ross Sea polynya: Implications for iron dynamics on the Antarctic continental shelf. Journal of Geophysical Research, 116(C12), C12019, https://doi.org/10.1029/2010JC006553
    Details
    Publication Date: 2023-12-13
    Description: The Ross Sea polynya is among the most productive regions in the Southern Ocean and may constitute a significant oceanic CO2 sink. Based on results from several field studies, this region has been considered seasonally iron limited, whereby a "winter reserve" of dissolved iron (dFe) is progressively depleted during the growing season to low concentrations (~0.1 nM) that limit phytoplankton growth in the austral summer (December-February). Here we report new iron data for the Ross Sea polynya during austral summer 2005-2006 (27 December-22 January) and the following austral spring 2006 (16 November-3 December). The summer 2005-2006 data show generally low dFe concentrations in polynya surface waters (0.10 ± 0.05 nM in upper 40 m, n = 175), consistent with previous observations. Surprisingly, our spring 2006 data reveal similar low surface dFe concentrations in the polynya (0.06 ± 0.04 nM in upper 40 m, n = 69), in association with relatively high rates of primary production (~170-260 mmol C/m**2/d). These results indicate that the winter reserve dFe may be consumed relatively early in the growing season, such that polynya surface waters can become "iron limited" as early as November; i.e., the seasonal depletion of dFe is not necessarily gradual. Satellite observations reveal significant biomass accumulation in the polynya during summer 2006-2007, implying significant sources of "new" dFe to surface waters during this period. Possible sources of this new dFe include episodic vertical exchange, lateral advection, aerosol input, and reductive dissolution of particulate iron.
    Keywords: Bottle, Niskin; CORSACS-1_NX1; CORSACS-1_NX10; CORSACS-1_NX11; CORSACS-1_NX2; CORSACS-1_NX3; CORSACS-1_NX4; CORSACS-1_NX5; CORSACS-1_NX6; CORSACS-1_NX7; CORSACS-1_NX8; CORSACS-1_NX9; CORSACS-2_NX12; CORSACS-2_NX13; CORSACS-2_NX14; CORSACS-2_NX15; CORSACS-2_NX16; CORSACS-2_NX17; CORSACS-2_NX18; CORSACS-2_NX19; CORSACS-2_NX20; CORSACS I; CORSACS II; DEPTH, water; Event label; International Polar Year (2007-2008); IPY; Iron, dissolvable; Iron, dissolved; Iron, particulate; Mixed layer depth; Nathaniel B. Palmer; NBP0601; NBP0601_NX1; NBP0601_NX10; NBP0601_NX11; NBP0601_NX2; NBP0601_NX3; NBP0601_NX4; NBP0601_NX5; NBP0601_NX6; NBP0601_NX7; NBP0601_NX8; NBP0601_NX9; NBP0608; NBP0608_NX12; NBP0608_NX13; NBP0608_NX14; NBP0608_NX15; NBP0608_NX16; NBP0608_NX17; NBP0608_NX18; NBP0608_NX19; NBP0608_NX20; NIS; Nitrate and Nitrite; Phosphorus, inorganic, dissolved; Ross Sea; Silicic acid
    Type: Dataset
    Format: text/tab-separated-values, 1365 data points
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    DATA PANGAEA
  • 10
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    Surface water properties, phytoplankton composition and photosynthesis rates of Amundsen Sea sites (2012)
    PANGAEA
    In:  Supplement to: Alderkamp, Anne-Carlijn; Mills, Matthew M; van Dijken, Gert L; Laan, Patrick; Thuróczy, Charles-Edouard; Gerringa, Loes J A; de Baar, Hein J W; Payne, Christopher D; Visser, Ronald J W; Buma, Anita G J; Arrigo, Kevin R (2012): Iron from melting glaciers fuels phytoplankton blooms in the Amundsen Sea (Southern Ocean): Phytoplankton characteristics and productivity. Deep Sea Research Part II: Topical Studies in Oceanography, 71-76, 32-48, https://doi.org/10.1016/j.dsr2.2012.03.005
    Details
    Publication Date: 2023-12-13
    Description: The phytoplankton community composition and productivity in waters of the Amundsen Sea and surrounding sea ice zone were characterized with respect to iron (Fe) input from melting glaciers. High Fe input from glaciers such as the Pine Island Glacier, and the Dotson and Crosson ice shelves resulted in dense phytoplankton blooms in surface waters of Pine Island Bay, Pine Island Polynya, and Amundsen Polynya. Phytoplankton biomass distribution was the opposite of the distribution of dissolved Fe (DFe), confirming the uptake of glacial DFe in surface waters by phytoplankton. Phytoplankton biomass in the polynyas ranged from 0.6 to 14 µg Chl a / L, with lower biomass at glacier sites where strong upwelling of Modified Circumpolar Deep Water from beneath glacier tongues was observed. Phytoplankton blooms in the polynyas were dominated by the haptophyte Phaeocystis antarctica, whereas the phytoplankton community in the sea ice zone was a mix of P. antarctica and diatoms, resembling the species distribution in the Ross Sea. Water column productivity based on photosynthesis versus irradiance characteristics averaged 3.00 g C /m**2/d in polynya sites, which was approximately twice as high as in the sea ice zone. The highest water column productivity was observed in the Pine Island Polynya, where both thermally and salinity stratified waters resulted in a shallow surface mixed layer with high phytoplankton biomass. In contrast, new production based on NO3 uptake was similar between different polynya sites, where a deeper UML in the weakly, thermally stratified Pine Island Bay resulted in deeper NO3 removal, thereby offsetting the lower productivity at the surface. These are the first in situ observations that confirm satellite observations of high phytoplankton biomass and productivity in the Amundsen Sea. Moreover, the high phytoplankton productivity as a result of glacial input of DFe is the first evidence that melting glaciers have the potential to increase phytoplankton productivity and thereby CO2 uptake, resulting in a small negative feedback to anthropogenic CO2 emissions.
    Keywords: Amundsen Sea; DynaLiFe; International Polar Year (2007-2008); IPY; Nathaniel B. Palmer; NBP0901; NBP0901_var; Water sample; WS
    Type: Dataset
    Format: application/zip, 5 datasets
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