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In: Oceanologia, Sopot : [Verlag nicht ermittelbar], 1971, 50(2008), 1, Seite 95-113, 0078-3234
In: volume:50
In: year:2008
In: number:1
In: pages:95-113
Description / Table of Contents: The Baltic Sea Science Congress was held at Rostock University, Germany, from 19 to 22 March 2007. In the session entitled "Upwelling events, coastal offshore exchange, links to biogeochemical processes" 20 presentations were given, including 7 talks and 13 posters related to the theme of the session. This paper summarises new findings of the upwelling-related studies reported in the session. It deals with investigations based on the use of in situ and remote sensing measurements as well as numerical modelling tools. The biogeochemical implications of upwelling are also discussed. Our knowledge of the fine structure and dynamic considerations of upwelling has increased in recent decades with the advent of high-resolution modern measurement techniques and modelling studies. The forcing and the overall structure, duration and intensity of upwelling events are understood quite well. However, the quantification of related transports and the contribution to the overall mixing of upwelling requires further research. Furthermore, our knowledge of the links between upwelling and biogeochemical processes is still incomplete. Numerical modelling has advanced to the extent that horizontal resolutions of c. 0.5 nautical miles can now be applied, which allows the complete spectrum of meso-scale features to be described. Even the development of filaments can be described realistically in comparison with high-resolution satellite data. But the effect of upwelling at a basin scale and possible changes under changing climatic conditions remain open questions.
Type of Medium: Electronic Resource
Pages: graph. Darst
ISSN: 0078-3234
Language: English
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Associated Volumes
  • 2
    In: Oceanologia, Sopot : [Verlag nicht ermittelbar], 1971, 50(2008), 2, Seite 205-220, 0078-3234
    In: volume:50
    In: year:2008
    In: number:2
    In: pages:205-220
    Description / Table of Contents: Existing coupled biophysical models for Baltic larval cod drift, growth and survival use idealised constructed mean prey fields of nauplius distributions. These simulations revealed the best feeding conditions for Baltic cod larvae longer than 6 mm. For shorter, first feeding larvae (between 4.5 and 6 mm) pronounced differences in growth and survival were observed, which depend on food availability and to a lesser degree on ambient temperature. We performed runs with an Individual-based Model (IBM) for Baltic cod larvae in order to demonstrate how natural variability in prey abundance influences the survival success of first feeding larvae. In the Baltic, this larval stage lives mainly between 20 and 40 m depth and feeds exclusively on the nauplii of different calanoid copepods (Acartia spp., Pseudocalanus acuspes, Temora longicornis and Centropages hamatus). Prey data obtained from vertically stratified samples in the Bornholm Basin (Baltic Sea) in 2001 and 2002 indicate a strong variability at spatial and temporal scales. We calculated larval survival and growth in relation to natural variation of prey fields, i.e. species-specific nauplius abundance. The results of the model runs yielded larval survival rates from 60 to 100% if the mean size of nauplii species was taken and lower survival if prey consisted of early nauplius stages only.
    Type of Medium: Electronic Resource
    ISSN: 0078-3234
    Language: English
    Location Call Number Limitation Availability
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