Seasonal variations in sea‐water surface temperatures within New Zealand harbours

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Abstract
Summary: Surface temperature records for the harbours of Auckland, Wellington, Lyttelton, Timaru, Otago, and Bluff have been compiled from ubservations taken frolll 1952 to 1955. For certain of these years mean, highest, and lowest recordings for 6‐day periods are presented to indicate in some detail the nature of seasonal trends. Monthly means, summer‐winter extreme and mean ranges are also tabulated. Diurnal”, and abrupt temperature variations in Wellington Harbour are demonstrated and their causes examined. A tidal oscillation in the summer daily temperature anomalies is shown for Portobello (Otago). Seasonal differences between harbour and offshore temperatures at Lyttelton and Otago are outlined, Some ecological implications of widely fluctuating temperatbres within harbomwaters are discussed, A bibliography of published temperature data for New Zealand ports and harbours is appended.

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