 |
| Titel |
Numerical modelling of physical processes governing larval transport in the southern North Sea |
| VerfasserIn |
M. C. H. Tiessen, L. Fernard, T. Gerkema, J. van der Molen, P. Ruardij, H. W. van der Veer |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1812-0784
|
| Digitales Dokument |
URL |
| Erschienen |
In: Ocean Science ; 10, no. 3 ; Nr. 10, no. 3 (2014-05-21), S.357-376 |
| Datensatznummer |
250116996
|
| Publikation (Nr.) |
 copernicus.org/os-10-357-2014.pdf |
|
|
|
|
|
| Zusammenfassung |
| A three-dimensional hydrodynamic model (GETM) was coupled with a particle
tracking routine (GITM) to study the inter-annual variability in transport
paths of particles in the North Sea and English Channel. For validation, a
comparison with observed drifter trajectories is also presented here. This
research investigated to what extent variability in the hydrodynamic
conditions alone (reflecting passive particle transport) contributed to
inter-annual variability in the transport of eggs and larvae. In this
idealised study, no a priori selection of specific spawning grounds or
periods was made and no active behaviour (vertical migration) or mortality
was included. In this study, egg and larval development towards coastal
nursery areas was based solely on sea water temperature, while settlement
areas were defined by a threshold water depth. Results showed strong
inter-annual variability in drift direction and distance, caused by a
combination of wind speed and direction. Strong inter-annual variability was
observed both in absolute amount of settlement in several coastal areas, and
in the relative importance of the different areas. The effects of wind and
temperature variability are minor for settlement along the western shores of
the North Sea and in the English Channel, but have a very significant impact
on settlement along the eastern shores of the North Sea. Years with strong
south-westerly winds across the Dover Straight resulted in higher settlement
figures along its eastern shores of the North Sea (standard deviation
37% of the mean annual settlement value). Settlement in the western
Dutch Wadden Sea did not only show inter-annual variability, but patterns
were also variable within each year and revealed seasonal changes in the
origin of particles: during winter, stronger currents along with colder
temperatures generally result in particles originating from further away. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|