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  • 1
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    3-D Seismic Interpretation (2003)
    Cambridge U. Press
    In:  New York, Cambridge U. Press, vol. A 744, pp. 6322, (ISBN 0-521-79203-7)
    Details
    Publication Date: 2003
    Keywords: Textbook of geophysics ; Seismics (controlled source seismology) ; Three dimensional
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    BIBLIOGRAPHY SEISMOLOGY
  • 2
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    Phase, polarity and the interpreter's wavelet (2002)
    In:  First Break, Minsk, Polish Geothermal Association, vol. 20, no. 3-4, pp. 277-281, pp. TC5003, (ISSN: 1340-4202)
    Details
    Publication Date: 2002
    Keywords: Seismics (controlled source seismology) ; Wavelet processing ; SRICHWALSKI
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    BIBLIOGRAPHY SEISMOLOGY
  • 3
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    Nanosat Intelligent Power System Development (1999)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: NASA Goddard Space Flight Center is developing a class of satellites called nano-satellites. The technologies developed for these satellites will enable a class of constellation missions for the NASA Space Science Sun-Earth Connections theme and will be of great benefit to other NASA enterprises. A major challenge for these missions is meeting significant scientific- objectives with limited onboard and ground-based resources. Total spacecraft power is limited by the small satellite size. Additionally, it is highly desirable to minimize operational costs by limiting the ground support required to manage the constellation. This paper will describe how these challenges are met in the design of the nanosat power system. We will address the factors considered and tradeoffs made in deriving the nanosat power system architecture. We will discuss how incorporating onboard fault detection and correction capability yields a robust spacecraft power bus without the mass and volume penalties incurred from redundant systems and describe how power system efficiency is maximized throughout the mission duration.
    Keywords: Spacecraft Design, Testing and Performance
    Type: Intelligent Micro Nano Technologies for Space Applications; Apr 11, 1999 - Apr 15, 1999; Pasadena, CA; United States
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 4
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    Feeding patterns of dominating small pelagic fish in the Gulf of Riga, Baltic Sea (2017)
    Springer
    In:  Hydrobiologia, 792 (1). pp. 331-344.
    Details
    Publication Date: 2020-02-06
    Description: We investigated the feeding of the dominant small pelagic fish—herring Clupea harengus membras and three-spined stickleback Gasterosteus aculeatus—in the Gulf of Riga (Baltic Sea) in the summers of 1999–2014. The share of empty stomachs, stomach fullness and taxonomic composition of fish diet was analysed. On average, large herring had the highest (19%) and small herring the lowest (6%) share of empty stomachs. Small (〈1 mm) cladoceran Bosmina spp. was the most important prey for three-spined stickleback; preying on small (〈1.5 mm) copepod Eurytemora affinis was the most efficient for small herring, while Bosmina spp. and E. affinis were equally important for the large herring, followed by the large (mean body length 〈2.0 mm) non-indigenous cladoceran Cercopagis pengoi. The number of prey taxa per stomach exhibited significant differences between the fish groups studied; the highest mean value was recorded for small herring and the lowest for three-spined stickleback (2.1 and 1.4 taxa, respectively). Although present, the fish group-specific spatial dynamics in feeding parameters (share of empty stomachs and feeding intensity) were weak compared to the observed interannual variation.
    Type: Article , PeerReviewed
    Format: text
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    PAPER (OCEANREP)
  • 5
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    Winter–spring climate effects on small-sized copepods in the coastal Baltic Sea (2017)
    Oxford Univ. Press
    In:  ICES Journal of Marine Science, 74 (7). pp. 1855-1864.
    Details
    Publication Date: 2020-02-06
    Description: The general positive effect of warmer winters on the abundance of small-sized zooplankton in the following spring and early summer has been reported from different parts of the Baltic Sea, but the mechanism of this link is not clear. Although causal links cannot be deduced with confidence from observational data, sufficiently detailed analyses can nevertheless provide insights to the potential mechanisms. We present an example of such an analysis, scrutinizing the effects of winter and spring hydroclimate on the abundance of small-sized dominant calanoid copepods (Eurytemora affinis and Acartia spp.), using data from 2080 zooplankton samples collected over 55 years (1957–2012) from a shallow coastal habitat (Pärnu Bay, Gulf of Riga) in the Baltic Sea. Our results indicated that the milder winters brought about higher abundances, and reduced seasonality of small-sized copepods, whereas ambient sea surface temperature (SST) mostly affected the relative abundance of adult stages. The sliding window correlation tests revealed temporal shifts in the effects of controlling variables: with the continuous increase in SST, the effect of winter temperature on the abundance of Acartia spp. weakened. In contrast, E. affinis was consistently affected by SST, but the effect of winter temperature was more pronounced during the period of on average colder winters.
    Type: Article , PeerReviewed
    Format: text
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    PAPER (OCEANREP)
  • 6
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    Dual impact of temperature on growth and mortality of marine fish larvae in a shallow estuarine habitat (2015)
    Elsevier
    In:  Estuarine, Coastal and Shelf Science, 167 . pp. 326-335.
    Details
    Publication Date: 2019-08-06
    Description: High individual growth and mortality rates of herring Clupea harengus membras and goby Pomatoschistus spp. larvae were observed in the estuarine habitat of the Gulf of Riga, Baltic Sea. Both instantaneous mortality (0.76–1.05) as well as growth rate (0.41–0.82 mm day-1) of larval herring were amongst highest observed elsewhere previously. Mortality rates of goby larvae were also high (0.57–1.05), while first ever data on growth rates were provided in this study (0.23–0.35 mm day-1). Our study also evidenced that higher growth rate of marine fish larvae did not result in lower mortalities. We suggest that high growth and mortality rates primarily resulted from a rapidly increasing and high (〉 18 °C) water temperature that masked potential food-web effects. The explanation for observed patterns lies in the interactive manner temperature contributed: i) facilitating prey production, which supported high growth rate and decreased mortalities; ii) exceeding physiological thermal optimum of larvae, which resulted in decreased growth rate and generally high mortalities. Our investigation suggests that the projected climate warming may have significant effect on early life history stages of the dominating marine fish species inhabiting shallow estuaries
    Type: Article , PeerReviewed
    Format: text
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    PAPER (OCEANREP)
  • 7
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    Temperature-driven changes in early life-history stages influence the Gulf of Riga spring spawning herring (Clupea harengus m.) recruitment abundance (2016)
    Springer
    In:  Hydrobiologia, 767 (1). pp. 125-135.
    Details
    Publication Date: 2019-08-06
    Description: Processes occurring during early life-history stages influence the year-class abundance of marine fish. We found that the abundance of 1-year-old spring spawning herring is statistically significantly determined by the number of post-flexion herring larvae in the Gulf of Riga (Baltic Sea). The abundance of consecutive developmental stages of larvae: yolk-sac, pre-flexion, flexion and post-flexion strongly correlated with each other, indicating that factors which already influence the yolk-sac stage are important in determining the abundance of post-flexion herring larvae. Winter air temperature before spawning determined the timing of maximum abundance of pre-flexion herring larvae, but not their main prey: copepod nauplii, implying that different mechanisms governing major preconditions for the formation of year-class strength. The abundance of post-flexion larvae displayed a potential dome-shaped relationship with sea surface temperature experienced after hatching. We suggest that increased summer temperatures, which exceed the physiological optimum negatively, affect the survival of post-flexion herring larvae. Overall, future climate warming poses an additional risk to larval herring survival and this may lead to a reduction in those herring stock which rely on recruitment from shallow coastal areas.
    Type: Article , PeerReviewed
    Format: text
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  • 8
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    Factors affecting the abundance of spring spawning herring (Clupea harengus membras) larvae in the Gulf of Riga (2015)
    In:  [Poster] In: ICES Annual Science Conference 2015, 21.-25.09.2015, Copenhagen, Denmark .
    Details
    Publication Date: 2015-12-16
    Type: Conference or Workshop Item , NonPeerReviewed
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  • 9
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    Spatiotemporal variability of the Baltic Sea mesozooplankton (2015)
    In:  [Talk] In: ICES Workshop on Spatial Analyses for the Baltic Sea (WKSPATIAL), 03.-06.11.2015, Rome, Italy .
    Details
    Publication Date: 2015-12-16
    Type: Conference or Workshop Item , NonPeerReviewed
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    PAPER (OCEANREP)
  • 10
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    Spatial and temporal variability of mesozooplankton in the Baltic Sea (2015)
    In:  [Talk] In: ICES Annual Science Conference 2015, 21.-25.09.2015, Copenhagen, Denmark .
    Details
    Publication Date: 2015-12-16
    Type: Conference or Workshop Item , NonPeerReviewed
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    PAPER (OCEANREP)
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