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  • 1
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    (Supplement 2) Sinking fluxes of particulate organic carbon in the southeastern Beaufort Sea during CCGS Amundsen cruise in summer 2008 (2011)
    PANGAEA
    Details
    Publication Date: 2024-04-27
    Keywords: Amundsen Gulf, Canada; Beaufort Sea; Carbon, organic, particulate, flux; CCGSA_4-10_CFL08; CCGS Amundsen; CFL08_1208; CFL08_1216-2; CFL08_410; CFL08_421-1; CFL08_6006-1; CFL08_BS; CFL08_CA04; CFL08_CA05; CFL08_CA08; CFL08_CA16; CFL08_CA18; CFL08_D34-2; Circumpolar Flaw Lead Leg 4-10a; Date/Time of event; DEPTH, water; Event label; Latitude of event; Longitude of event; MOOR; Mooring; MULT; Multiple investigations; Northwestern Passages
    Type: Dataset
    Format: text/tab-separated-values, 12 data points
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    DATA PANGAEA
  • 2
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    Benthic carbon turnover, sediment pigment concentrations and sinking fluxes of POC in the southeastern Beaufort Sea during CCGS Amundsen cruise 2008 (2011)
    PANGAEA
    In:  Supplement to: Tremblay, Jean-Éric; Bélanger, Simon; Barber, David G; Asplin, M; Martin, J; Darnis, Gerald; Fortier, Louis; Gratton, Yves; Link, Heike; Archambault, Philippe; Sallon, Amèlie; Michel, Christine; Williams, W J; Philippe, Benoit; Gosselin, M (2011): Climate forcing multiplies biological productivity in the coastal Arctic Ocean. Geophysical Research Letters, 38(18), L18604, https://doi.org/10.1029/2011GL048825
    Details
    Publication Date: 2024-04-27
    Description: The effects of changing ice and atmospheric conditions on the upwelling of deep nutrient-laden waters and biological productivity in the coastal Beaufort Sea were quantified using a unique combination of in situ and remote-sensing approaches. Repeated instances of ice ablation and upwelling during fall 2007 and summer 2008 multiplied the production of ice algae, phytoplankton, zooplankton and benthos by 2 to 6 fold. Strong wind forcing failed to induce upward shifts in the biological productivity of stratified waters off the shelf.
    Keywords: International Polar Year (2007-2008); IPY
    Type: Dataset
    Format: application/zip, 2 datasets
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    DATA PANGAEA
  • 3
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    (Supplement 1) Benthic carbon turnover and sediment pigments in the southeastern Beaufort Sea during CCGS Amundsen cruise in summer 2008 (2011)
    PANGAEA
    Details
    Publication Date: 2024-04-27
    Keywords: Amundsen Gulf, Canada; Area/locality; Beaufort Sea; CCGSA_4-10_CFL08; CCGS Amundsen; CFL08_1020A-2; CFL08_1116; CFL08_CAG1; CFL08_CAG2; CFL08_CS; CFL08_D37-2; CFL08_DB; CFL08_FB3; CFL08_NAG1; CFL08_NAG2; CFL08_SS1; CFL08_SS2; CFL08_SS3; CFL08_WFB; Chlorophyll a, standard deviation; Chlorophyll a per unit sediment mass; Circumpolar Flaw Lead Leg 4-10a; DATE/TIME; DEPTH, sediment/rock; Derived from sediment oxygen demand; Elevation of event; Event label; Latitude of event; Longitude of event; MULT; Multiple investigations; Northwestern Passages; Phaeopigments, standard deviation; Phaeopigments per unit sediment mass; Remineralisation rate, standard deviation; Remineralisation rate of carbon
    Type: Dataset
    Format: text/tab-separated-values, 98 data points
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    DATA PANGAEA
  • 4
    Electronic Resource
    Electronic Resource
    Identification of the ν 3 NO 2 Band in the Solar Spectrum observed from a Balloon Borne Spectrometer (1970)
    [s.l.] : Nature Publishing Group
    Nature 225 (1970), S. 443-444 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] In this region, the solar spectrum2 as observed from a balloon borne spectrometer at float altitude (30 km), while the Sun was setting, reveals a series of weak lines which occur among the well known H2O lines. For example, a number of weak lines are observed on both sides of the normally isolated ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/225443a0
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Nitric Acid and Nitric Oxide in the Lower Stratosphere (1968)
    [s.l.] : Nature Publishing Group
    Nature 218 (1968), S. 78-79 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Subsequent investigations indicate that the absorption is due to HNO3. The increase in the absorption as the Sun sets indicates that the absorber is not uniformly distributed but that its concentration increases in a layer below the altitude of the balloon (30 km) and above the minimum altitude on ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/218078a0
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Some system considerations of neuron pools with feedback (1976)
    Springer
    Biological cybernetics 21 (1976), S. 79-83 
    Details
    ISSN: 1432-0770
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Computer Science , Physics
    Notes: Abstract This paper describes an approach to the analysis of the inputoutput relationships present in a neuron pool that receives a number of inputs. These inputs consist of primary inputs to the neuron pool and inputs resulting from feedback of information from the neuron pool as well. Multiple input-output relationships are obtained in terms of the synaptic weightings of the inputs, the membrane response characteristics of the neurons and the conduction delays on the feedback pathways.y=(I+MHD) -1 ·MFx is the explicit representation of the cell pool behavior assuming quasi-linear conditions, wherey is the output vector of cell responses,I is the identity matrix,M is the response matrix of the cells,H is the feedback synaptic weighting matrix,D is the delay matrix,F is the input weighting matrix, andx is the input vector. It is shown that a solution to this formulation exists, is unique, is stable, and can be computed by specified algorithms. An insight gained from this formulation suggests that the output of each cell in the pool is related to virtually all of the inputs to the pool and the outputs of all cells in the pool.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01259389
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    Biological system transfer-function extraction using swept-frequency and correlation techniques (1972)
    Springer
    Medical & biological engineering & computing 10 (1972), S. 609-620 
    Details
    ISSN: 1741-0444
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Description / Table of Contents: Sommaire L'article décrit l'application d'une technique d'identification à système de balayage de fréquence, aux systèmes biologiques. En balayant linéairement la fréquence d'un signal sinusoïdal d'entrée à travers la gamme des fréquences sous observation, le profil de réponse à la fréquence d'un système biologique peut être déterminé rapidement. Les caractéristiques de transfer de système sont extraites de la densité spectrale de puissance d'entrée et des calculs de densité spectrale à puissance croisée sortie-entrée. Le bruit de fond, la distorsion harmonique et les considérations de durée de balayage sont données. Le balayage de fréquence logarithmique est suggéré comme moyen d'éviter la distorsion harmonique.
    Abstract: Inhaltsangabe Diese Arbeit beschreibt die Anwendung eines Frequenzwobbel-Erkennungsverfahrens auf biologische Systeme. Das Frequenzverhalten eines biologischen Systems kann sehr schnell bestimmt werden, idem die Frequenz des sinusförmigen Einganssignales über den interessierenden Frequenzbereich linear variiert wird. Die Systemübertragungsfunktion wird aus Berechnungen der eingangsseitigen spektralen Leistungsdichte und der spektralen Eingangs/Ausgangs-Übertragungsleistungsdichte erhalten. Überlegungen hinsichtlich Rauschens, harmonischer Verzerrungen und der Frequenzänderungsgeschwindigkeit werden angeführt. Zur Vermeidung harmonischer Verzerrungen wird eine logarithmische Frequenzvariation vorgeschlagen.
    Notes: Abstract The paper describes the application of a swept-frequency-system identification technique to biological systems. By linearly sweeping the frequency of the sinusoidal input signal over the range of frequencies of interest, the frequency-response profile of the biological system can be rapidly determined. System transfer characteristics are extracted from the input-power spectral density and output-input crosspower spectral-density computations. Noise, harmonic distortion and sweeptime considerations are given. Logarithmic frequencysweeping is suggested as a means of avoiding harmonic distortion.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02476078
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  • 8
    Electronic Resource
    Electronic Resource
    Velocity dispersion in skeletal muscle efferent nerve bundle and its effect upon time and frequency response (1969)
    Springer
    Medical & biological engineering & computing 7 (1969), S. 283-288 
    Details
    ISSN: 1741-0444
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Description / Table of Contents: Sommaire On montre que les dispersions des vitesses de conduction dans un faisceau de nerfs desservant un muscle du squelette sont en première approximation sans effet sur le temps de réponse et la réponse en fréquence du muscle. Les effets secondaires dûs à une désynchronisation des salves afférentes provoquent entre le faisceau de nerfs et le muscle un ‘effet d'interface’. Cet effet d'interface peut être important pour des considérations biocybernétiques de l'action neuro-musculaire.
    Abstract: Zusammenfassung Es wird gezeigt, daß die Geschwindigkeitsverteilung in dem zu einem Skelettmuskel gehörigen Nervenbündel keinen signifikanten primären Effekt auf die Zeit und Frequenzansprechbarkeit des Muskels hat. Sekundäre Effekte, die auf Desynchronisation in der efferenten Entladung beruhen, können zwischen dem Nervenbündel und dem Muskel ‘Grenzflächeneffekte’ verursachen. Dieser ‘Grenzflächeneffekt’ kann für biokybernetische Betrachtungen der neuromuskulären Leistung von Bedeutung sein.
    Notes: Abstract Velocity dispersion in the nerve bundle subserving a skeletal muscle is shown not to have a significant primary effect on the time and frequency response of muscle. Secondary effects due to desynchronization in efferent volleys may produce an ‘interface effect’ between the nerve bundle and the muscle. This ‘interface effect’ may be important in biocybernetic considerations of neuromuscular action.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02474768
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  • 9
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    Fukushima radioactivity transport to North America [Environmental Sciences] (2015)
    National Academy of Sciences
    Details
    Publication Date: 2015-02-04
    Description: The large discharge of radioactivity into the northwest Pacific Ocean from the 2011 Fukushima Dai-ichi nuclear reactor accident has generated considerable concern about the spread of this material across the ocean to North America. We report here the first systematic study to our knowledge of the transport of the Fukushima...
    Print ISSN: 0027-8424
    Electronic ISSN: 1091-6490
    Topics: Biology , Medicine , Natural Sciences in General
    Published by National Academy of Sciences
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  • 10
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    Spatial patterns in zooplankton communities and stable isotope ratios ({delta}13C and {delta}15N) in relation to oceanographic conditions in the sub-Arctic Pacific and western Arctic regions during the summer of 2008 (2014)
    Oxford University Press
    Details
    Publication Date: 2014-05-09
    Description: We define the biogeographic status quo of zooplankton communities sampled during the summer of 2008 in the sub-Arctic Pacific and western Arctic regions and examine spatial patterns of stable isotopes in the context of regional oceanography. Eight zooplankton assemblages were identified and corresponded to these regions: Gulf of Alaska, Bering Sea Slope, St-Lawrence Island, Western Bering Strait, Eastern Bering Strait, Barrow Canyon, Beaufort Gyre and Beaufort Shelf. Neocalanus spp., Eucalanus bungii and Metridia pacifica were abundant in the warmer and saltier waters of the Gulf of Alaska and on the Bering Sea Slope, whereas Calanus hyperboreus, Calanus glacialis and Metridia longa were abundant in the cold and fresher Arctic waters on the Beaufort Shelf and in the Beaufort Gyre. Salinity, nitrate and temperature, all of which were strongly correlated with latitude, and water column depth were the main factors influencing variation of zooplankton composition and spatial distribution. The 15 N values were less enriched in the Gulf of Alaska and on the Bering Sea Slope and more enriched in the eastern portion of Bering Strait and in Barrow Canyon. The 13 C values of zooplankton were more depleted in the Gulf of Alaska and in the Beaufort Sea regions and were more enriched in Western Bering Strait. The level of carnivory in the zooplankton community appeared highest in the Beaufort Gyre decreasing on the Beaufort Shelf and lowest in Western Bering Strait and in the Gulf of Alaska. Our results highlight the existence of large intra- and inter-specific differences in zooplankton isotopic signatures in relation to community composition and environmental conditions.
    Print ISSN: 0142-7873
    Electronic ISSN: 1464-3774
    Topics: Biology
    Published by Oxford University Press
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