Physical oceanography of Rangaunu Harbour, Northland, New Zealand
作者:
R. A. Heath,
B. S. Shakespeare,
M. J. N. Greig,
期刊:
New Zealand Journal of Marine and Freshwater Research
(Taylor Available online 1983)
卷期:
Volume 17,
issue 4
页码: 481-493
ISSN:0028-8330
年代: 1983
DOI:10.1080/00288330.1983.9516021
出版商: Taylor & Francis Group
关键词: Rangaunu Harbour;tides;salinity;tidal currents;friction;physical oceanography;sedimentation;temperature
数据来源: Taylor
摘要:
Current meter, current drogue, salinity, temperature, and tidal elevation observations from Rangaunu Harbour are presented. The flow is dominated by the tides, the ebb tide in general being stronger than the flood. The time of high tide is increasingly delayed with distance from the open ocean. High tide at the head of the harbour lags about an hour behind that at the mouth. The phase of the flow relative to that of the elevation is less than that for a frictionless system. This difference from a quarter of a tidal period results from tidal energy dissipation and probably varies through the spring‐neap tidal cycle. The outer harbour has essentially coastal water which is exchanged each tide. Residence time of the inner harbour waters and the inner harbour shallows (where evaporation is sufficient to raise the salinity) is several days.
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