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  • 1
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    Coccolithophore abundance and biometry in the South China Sea, 2014 (2016)
    PANGAEA
    In:  Supplement to: Jin, Xiaobo; Liu, Chuanlian; Poulton, Alex J; Dai, Minhan; Guo, X (2016): Coccolithophore responses to environmental variability in the South China Sea: species composition and calcite content. Biogeosciences, 13(16), 4843-4861, https://doi.org/10.5194/bg-13-4843-2016
    Details
    Publication Date: 2023-09-23
    Description: Coccolithophore contributions to the global marine carbon cycle are regulated by the calcite content of their scales (coccoliths), and the relative cellular levels of photosynthesis and calcification. All three of these factors vary between coccolithophore species, and with response to the growth environment. Here, water samples were collected in the northern basin of the South China Sea (SCS) during summer 2014 in order to examine how environmental variability influenced species composition and cellular levels of calcite content. The vertical structure of the coccolithophore community was strongly regulated by mesoscale eddies. All living coccolithophores produced within the euphotic zone (1 % of surface irradiance), and Florisphaera profunda was a substantial coccolithophore and coccolith-calcite producer in the Deep Chlorophyll-a Maximum (DCM), especially in most oligotrophic anti-cyclonic eddy centers. Placolith-bearing coccolithophores, plus F. profunda, and other larger and numerically rare species made almost equal contributions to coccolith-based calcite in the water column. For Emiliania huxleyi biometry measurements, coccolith size positively correlated with nutrients, and it is suggested that coccolith length is influenced by nutrient and light related growth rates. However, larger sized coccoliths were related to low pH and calcite saturation, although it is not a simple cause and effect relationship. Genotypic or ecophenotypic variation may also be linked to coccolith size variation.
    Type: Dataset
    Format: application/zip, 4 datasets
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  • 2
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    Distal shield length, coccosphere diameter and number of coccoliths per coccosphere of Emiliania huxleyi in the South China Sea, 2014 (2016)
    PANGAEA
    Details
    Publication Date: 2023-09-23
    Keywords: Coccoliths per coccosphere; Coccosphere, diameter; CTD; CTD/Rosette; CTD-RO; D9; Date/Time of event; DEPTH, water; Emiliania huxleyi, distal shield, length; Event label; F1; Latitude of event 2; Longitude of event; Sample code/label; SCS_D9; SCS_F1; SCS_G2; SCS_H3; SCS_I3; SCS_X3; SCS_X4; SCS_X5; South China Sea
    Type: Dataset
    Format: text/tab-separated-values, 408 data points
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    DATA PANGAEA
  • 3
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    Coccolithophore abundance in the South China Sea, 2014 (2016)
    PANGAEA
    Details
    Publication Date: 2023-09-23
    Keywords: Algirosphaera robusta; Calcidiscus leptoporus; Calciosolenia spp.; CTD; CTD/Rosette; CTD-RO; D9; Date/Time of event; DEPTH, water; Discosphaera tubifer; Emiliania huxleyi; Event label; F1; Florisphaera profunda; Gephyrocapsa ericsonii; Gephyrocapsa oceanica; Gladiolithus flabellatus; Helicosphaera carteri; I6; Latitude of event; Longitude of event; Michaelsarsia spp.; Oolithotus fragilis; Rhabdosphaera clavigera; Sample code/label; SCS_D9; SCS_F1; SCS_G2; SCS_H3; SCS_I1; SCS_I2; SCS_I3; SCS_I4; SCS_I5; SCS_I6; SCS_I7; SCS_J1; SCS_X3; SCS_X4; SCS_X5; South China Sea; Syracosphaera spp.; Umbellosphaera irregularis; Umbellosphaera tenuis; Umbilicosphaera sibogae
    Type: Dataset
    Format: text/tab-separated-values, 1296 data points
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  • 4
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    Distal shield length of Emiliania huxleyi and corresponding water chemistry parameters in the South China Sea, 2014 (2016)
    PANGAEA
    Details
    Publication Date: 2023-09-23
    Keywords: Alkalinity, total; CTD; CTD/Rosette; CTD-RO; D9; Date/Time of event; DEPTH, water; Emiliania huxleyi, distal shield, length; Event label; F1; Latitude of event; Longitude of event; Nitrate and Nitrite; pH; Phosphate; Saturation index; SCS_D9; SCS_F1; SCS_G2; SCS_H3; SCS_I1; SCS_I2; SCS_I3; SCS_I4; SCS_I7; SCS_X3; SCS_X4; SCS_X5; South China Sea; Standard deviation; Temperature, water
    Type: Dataset
    Format: text/tab-separated-values, 232 data points
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  • 5
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    Coccolithophore-based calcite concentration in the South China Sea, 2014 (2016)
    PANGAEA
    Details
    Publication Date: 2023-09-23
    Keywords: Calcite; Coccoliths; Contribution; CTD; CTD/Rosette; CTD-RO; D9; Date/Time of event; DEPTH, water; Event label; F1; I6; Latitude of event; Longitude of event; SCS_D9; SCS_F1; SCS_G2; SCS_H3; SCS_I1; SCS_I2; SCS_I3; SCS_I4; SCS_I5; SCS_I6; SCS_I7; SCS_X3; SCS_X4; SCS_X5; South China Sea
    Type: Dataset
    Format: text/tab-separated-values, 520 data points
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    DATA PANGAEA
  • 6
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    Effects of ocean acidification caused by rising CO2 on the early development of three mollusks (2015)
    PANGAEA
    In:  Supplement to: Guo, X; Huang, M; Pu, F; You, W; Ke, C (2015): Effects of ocean acidification caused by rising CO2 on the early development of three mollusks. Aquatic Biology, 23(2), 147-157, https://doi.org/10.3354/ab00615
    Details
    Publication Date: 2024-03-15
    Description: Increasing atmospheric CO2 can decrease seawater pH and carbonate ions, which may adversely affect the larval survival of calcareous animals. In this study, we simulated future atmospheric CO2 concentrations (800, 1500, 2000 and 3000 ppm) and examined the effects of ocean acidification on the early development of 3 mollusks (the abalones Haliotis diversicolor and H. discus hannai and the oyster Crassostrea angulata). We showed that fertilization rate, hatching rate, larval shell length, trochophore development, veliger survival and metamorphosis all decreased significantly at different pCO2 levels (except oyster hatching). H. discus hannai were more tolerant of high CO2 compared to H. diversicolor. At 2000 ppm CO2, 79.2% of H. discus hannai veliger larvae developed normally, but only 13.3% of H. diversicolor veliger larvae. Tolerance of C. angulata to ocean acidification was greater than the 2 abalone species; 50.5% of its D-larvae developed normally at 3000 ppm CO2. This apparent resistance of C. angulata to ocean acidification may be attributed to their adaptability to estuarine environments. Mechanisms underlying the resistance to ocean acidification of both abalones requires further investigation. Our results suggest that ocean acidification may decrease the yield of these 3 economically important shellfish if increasing CO2 is a future trend.
    Keywords: Abnormality; Abnormality, standard deviation; Alkalinity, total; Alkalinity, total, standard deviation; Animalia; Aragonite saturation state; Benthic animals; Benthos; Bicarbonate ion; Bottles or small containers/Aquaria (〈20 L); Calcite saturation state; Calculated using CO2SYS; Calculated using seacarb after Nisumaa et al. (2010); Carbon, inorganic, dissolved; Carbonate ion; Carbonate system computation flag; Carbon dioxide; Coast and continental shelf; Crassostrea angulata; Development; Fertilization success rate; Fertilization success rate, standard deviation; Figure; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Growth/Morphology; Haliotis discus hannai; Haliotis diversicolor; Hatching rate; Hatching rate, standard deviation; Laboratory experiment; Metamorphosis rate; Metamorphosis rate, standard deviation; Mollusca; Mortality/Survival; North Pacific; OA-ICC; Ocean Acidification International Coordination Centre; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); Percentage; Percentage, standard deviation; pH; pH, standard deviation; Potentiometric; Potentiometric titration; Reproduction; Salinity; Salinity, standard deviation; Shell length; Shell length, standard deviation; Single species; Species; Stage; Survival; Survival rate, standard deviation; Temperate; Temperature, water; Temperature, water, standard deviation; Time in hours; Treatment
    Type: Dataset
    Format: text/tab-separated-values, 3738 data points
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    DATA PANGAEA
  • 7
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    Early development of undulated surf clam, Paphia undulate under elevated pCO2 (2016)
    PANGAEA
    In:  Supplement to: Guo, X; Xu, Xiaowei; Zhang, Pengfei; Huang, M; Luo, Xuan; You, W; Ke, C (2016): Early development of undulated surf clam, Paphia undulate under elevated pCO2. Journal of Experimental Marine Biology and Ecology, 484, 23-30, https://doi.org/10.1016/j.jembe.2016.08.002
    Details
    Publication Date: 2024-03-15
    Description: Increasing atmospheric CO2 can decrease the seawater pH and carbonate ions, which may adversely affect the larval survival of calcareous animals. In this study, we simulated future atmospheric CO2 concentrations (800, 1500, 2000 and 3000 µatm) and examined the effects of ocean acidification on the embryonic and larval stage of an infaunal clam Paphia undulate. Significant decrease of hatching of P. undulate was observed when the pCO2 reached 3000 µatm, and larval deformation rate increased significantly when pCO2 reached 2000 µatm, indicating a strong tolerance to ocean acidification compared with the embryonic development of other bivalves. The larvae cultured in 1500 µatm pCO2 exhibited the fastest growth, highest survival and shortened planktonic period, which unordinary phenomenon reflected the beneficial effect of ocean acidification on P. undulate larval development. The better development of P. undulate larvae under a higher CO2 condition maybe an adaptation in response to the acidified sediment in which they live.
    Keywords: Alkalinity, total; Alkalinity, total, standard deviation; Animalia; Aragonite saturation state; Benthic animals; Benthos; Bicarbonate ion; Bottles or small containers/Aquaria (〈20 L); Calcite saturation state; Calculated using CO2SYS; Calculated using seacarb after Nisumaa et al. (2010); Carbon, inorganic, dissolved; Carbonate ion; Carbonate system computation flag; Carbon dioxide; Coast and continental shelf; Development; Experiment; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Growth/Morphology; Hatching rate; Incubation duration; Laboratory experiment; Larval deformity rate; Metamorphosis rate; Mollusca; Mortality/Survival; North Pacific; OA-ICC; Ocean Acidification International Coordination Centre; Paphia undulate; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); Pelagos; pH; pH, standard deviation; Potentiometric; Potentiometric titration; Registration number of species; Replicate; Reproduction; Salinity; Salinity, standard deviation; Shell increment; Shell length; Single species; Species; Survival; Temperate; Temperature, water; Temperature, water, standard deviation; Treatment; Type; Uniform resource locator/link to reference; Zooplankton
    Type: Dataset
    Format: text/tab-separated-values, 5667 data points
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  • 8
    Electronic Resource
    Electronic Resource
    Spin-specific photoelectron diffraction using magnetic x-ray circular dichroism : The 6th joint magnetism and magnetic materials (MMM)-intermag conference (1994)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 76 (1994), S. 6465-6467 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The first observation of spin-dependent photoelectron diffraction using circularly polarized x rays is reported for monolayer ferromagnetic fcc Fe films on Cu(001). Circularly polarized x rays are used to produce spin-polarized photoelectrons from the Fe2p spin-orbit split doublet, and intensity asymmetries in the 2p3/2 level of ≈3% are observed. The asymmetry is dependent on the relative orientation of the x-ray polarization vector and the Fe magnetic moment. This spin-dependent technique promises the direct, element-specific determination not only of local atomic structure, but magnetic structure as well.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.358225
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  • 9
    Electronic Resource
    Electronic Resource
    A molecular beam investigation into the dynamics and kinetics of dissociative O2 adsorption on Pt{100}-(1×1) (1996)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 104 (1996), S. 4283-4293 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The dissociative chemisorption of oxygen on Pt{100}-(1×1) has been investigated using supersonic molecular beams with incident translational energies between 0.04 and 0.90 eV over the surface temperature range 300 to 380 K. The adsorption process on the Pt{100}-(1×1) surface is found to differ from that on the reconstructed Pt{100}-hex-R surface in both magnitude and mechanism. The initial dissociative sticking probability is (approximately-greater-than)0.2 on the (1×1) surface for all beam energies and surface temperatures investigated, whereas on the reconstructed Pt{100}-hex-R surface, under corresponding conditions, the initial sticking probability never exceeds 0.003. The initial sticking probability on the (1×1) surface at first decreases with increasing incident energy and then increases as the incident energy exceeds 0.1 eV, in a manner typical of an adsorption process that is precursor mediated at low incident energies and direct at higher incident energies. Precursor-mediated adsorption at low energies is also indicated by scattering measurements and by the angular variation of the initial sticking probability. At high incident energies the angular variation of the initial sticking probability indicates that adsorption is an activated process. Sticking probability measurements as a function of coverage indicate no extrinsic precursor involvement over the energy range studied; repulsive lateral interactions exist between adsorbed oxygen atoms. Thermal energy atom scattering measurements show an absence of island formation upon adsorption, in contrast to adsorption on the hex-R face. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.471238
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  • 10
    Electronic Resource
    Electronic Resource
    A new ECR ion source for atomic physics research at Institute of Modern Physics : Papers from the Ninth International Conference on Ion Sources (2002)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 73 (2002), S. 580-581 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A new electron cyclotron resonance (ECR) ion source (LECR3—Lanzhou Electron Cyclotron Resonance Ion Source No. 3) has been constructed this year. The main purpose of this source is to provide highly charged ion beams for atomic physics and surface physics research. The design of this ion source is based on the IMP 14.5 GHz ECR ion source (LECR2—Lanzhou Electron Cyclotron Resonance Ion Source No. 2) with double rf heating by inserting waveguide directly and aluminum chamber. Furthermore, the volume of the plasma chamber is larger than that of LECR2 so as to increase the rf power and improve beam intensity for highly charged ions. But the hexapole field on the chamber wall is kept the same value in order to compare with the performance of LECR2. After only four days conditioning the first test results were obtained. The final result of this ion source is expected to be better than LECR2's. © 2002 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1429317
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