INVESTIGADORES
PISONI Juan Pablo
artículos
Título:
Tide and wind forced nearshore dynamics in Nuevo Gulf (Northern Patagonia, Argentina): Potential implications for cross-shore transport.
Autor/es:
FERNANDO DELLATORRE; JUAN P. PISONI; PEDRO BARÓN; ANDRÉS L. RIVAS
Revista:
JOURNAL OF MARINE SYSTEMS
Editorial:
ELSEVIER SCIENCE BV
Referencias:
Año: 2012 vol. 96 p. 82 - 89
ISSN:
0924-7963
Resumen:
The coastal hydrodynamics of an eastward-facing bay (Nueva Bay) located in the west coast of Nuevo Gulf
(42.76° S, 65.03° W) was inferred using time series of seawater temperature, winds and tides. Temperature
was measured at surface and near the bottom at a station with a maximum depth of 18 m. Concurrent observations
of wind intensity and direction were registered at ~3 km from the station. Tidal levels were predicted
using the WXTide software. Surface heat flux explained the observed annual cycle of seawater temperature
and the seasonal thermal stratification. Events of upwelling/downwelling were observed associated to offshore/
onshore winds, with lags of approximately 56 hours. Spectral analysis of the temperature time series
showed significant diurnal and semidiurnal peaks during the warm season (spring and summer), when the
water column was stratified. The semidiurnal peaks of spectral energy were correlated with the main components
of the tidal cycle. Diurnal thermal variability was driven by diurnal cycles of wind (sea breeze) occurring
during 52% of spring days and 61% of summer days. We present two conceptual models of
nearshore dynamics that are coherent with the observed thermal variability (up to 4 °C in 6 hours).