Istituto Nazionale di Oceanografia e di Geofisica Sperimentale

Istituto Nazionale di Oceanografia e di Geofisica Sperimentale
Seminari di Oceanografia e di Geofisica Sperimentale
Leslie Aveytua
Applied 2-D hydrodynamical
model in a sub-tropical coastal
lagoon during different physical
regimens conditions
In the present study, we illustrate the results of the numerical modelling and
the quantitative interpretation of the physical dynamics of the San Quintin Bay
(SQB), with special attention to the effects of the upwelling conditions and the
spring-neap tides cycles on the lagoon.
The main external physical and biogeochemical forcing in SQB originates from
the neighboring coastal ocean, which is strongly influenced by upwelling.
The frequency of the upwelling pulses and tidal exchanges control the temporal
variability of primary production and nutrients near the mouth of the bay.
Therefore, understanding the role and impact of upwelling is crucial, as it can
have very different consequences on ecosystems depending on the basin scale,
ecosystem types and physical processes.
To investigate these processes, we used a hydrodynamic model forced by
tides, wind stress and heat fluxes.
The hydrodynamic model has been compared with experimental data of
current velocity, temperature and salinity collected during May and August
2004.
We suggest that the ability of this ecosystem to assimilate nutrients through
primary production is the result of the advection of newly upwelled waters
from the adjacent coastal ocean.
30 maggio 2014
ore 11:00
Sala “Antonio Michelato”, Palazzina “Ferruccio Mosetti”
OGS – Borgo Grotta Gigante
http://nettuno.ogs.trieste.it/jungo/caffe_scientifico/