hrvatski

Harmonična i spektralna analiza morskih struja u sjevernom dijelu Riječkog zaljeva

During July 1999 sea currents were measured at two depths in northern part of the Rijeka Bay (1 m and 41 m), using autonomous AANDERAA RCM-7 current meters. The purpose of the experiment was to determine characteristics of current field of a small region (around 1 km2), bounded by headland Podurinje from the east and inlet Perilo from the west. The results of harmonic and rotational spectral analysis showed that the currents were WNW directed, with three times larger speeds in subsurface layer than in the near bottom layer. Significant current oscillations were detected at diurnal tidal period, with tendency for counterclockwise rotation. Secondary energy maxima were observed at inertial period (around 17.2 h) and semidiurnal tidal period (around 12 h), with tendency for clockwise rotation. This is in agreement with previous knowledge about near bottom output currents of Bakar Bay. Harmonic constituents K1 and M2 showed that tidal currents were weak in the subsurface layer, and even weaker in the near bottom layer. This leads to the conclusion that during the summer season the most energetic current oscillations exist at periods longer than 24 h.

Riečki zaljev; morske struje

nije evidentirano

engleski

Harmonic and Spectral Analysis of Current Measurements in the Northern Part of the Rijeka Bay

During July 1999 sea currents were measured at two depths in northern part of the Rijeka Bay (1 m and 41 m), using autonomous AANDERAA RCM-7 current meters. The purpose of the experiment was to determine characteristics of current field of a small region (around 1 km2), bounded by headland Podurinje from the east and inlet Perilo from the west. The results of harmonic and rotational spectral analysis showed that the currents were WNW directed, with three times larger speeds in subsurface layer than in the near bottom layer. Significant current oscillations were detected at diurnal tidal period, with tendency for counterclockwise rotation. Secondary energy maxima were observed at inertial period (around 17.2 h) and semidiurnal tidal period (around 12 h), with tendency for clockwise rotation. This is in agreement with previous knowledge about near bottom output currents of Bakar Bay. Harmonic constituents K1 and M2 showed that tidal currents were weak in the subsurface layer, and even weaker in the near bottom layer. This leads to the conclusion that during the summer season the most energetic current oscillations exist at periods longer than 24 h.

Rijeka Bay; sea currents

nije evidentirano