Recoveries of drift cards released from: Oil rigs around New Zealand, 1975–76 (note)     

R. A. Heath  B. S. Shakespeare 《新西兰海洋与淡水研究杂志》2013,47(2):393-400

Drift cards were released in batches of 50 every 2 d at drilling sites off the north and south Taranaki coast (May‐October 1975), Banks Peninsula (July‐August 1975), and in Tasman (January‐March 1976) and Hawke Bays (November 1975‐January 1976). The shortest distance “despatch to recovery” trajectories indicate that only in the South Taranaki Bight are the trajectories predominantly unidirectional, the surface drift being southwards on the west coast of the North Island south of Cape Egmont. The trajectories of cards despatched in both Tasman and Hawke Bays highlight the variable nature of the surface drift in these bays.  相似文献   

Circulation and hydrology of Manukau Harbour   总被引：1，自引：1，他引：0  

R. A. Heath  M. J. N. Greig  B. S. Shakespeare 《新西兰海洋与淡水研究杂志》2013,47(3):589-607

Abstract

Current meter and current drogue measurements made over tidal periods show that the circulation in Manukau Harbour is mainly tidal, with strongest flows within the inner harbour in the four main channels. In the entrance channel, peak tidal speeds reach 2.25 m.s^?1 at the surface, and 0.6 m.s^?1 near the bottom. Salinity and temperature observations show that the water is nearly homogeneous with depth in summer. A residence time of 22 d is calculated, assuming the small horizontal salinity contrast is maintained by freshwater inflow and evaporation.  相似文献   

Semi‐diurnal tides in Cook Strait   总被引：2，自引：2，他引：0  

R. A. Heath 《新西兰海洋与淡水研究杂志》2013,47(2):87-97

The phases and amplitudes of the M₂ and S₂ constituents of tidal elevation in Coiok Strait may be adequately described as an open mouth reflection of tidal waves advancing from the east and west coasts of New Zealand and reflecting near the latitudes of Titahi Bay and Cape Campbell (a distance of approximately 60 km). Other reflection conditions give amplitude and phase distributions different from those observed. Best fits to the observed phases and amplitudes for the M₂ tide elevation arise from non‐rotational one‐dimensional solutions which allow for the bathymetry. If rotation is introduced in the form of Kelvin Wave solutions, the result is a two‐dimensional phase‐distribution pattern qualitatively similar to that observed, with the change in phase more rapid and the tidal amplitude smaller on the eastern than on the western side of Cook Strait.

The solution for the S₂ tide also fits closest to the observed tidal elevations for the non‐rotational one dimensional solution, but the introduction of rotation leads to a two‐dimensional phase‐distribution pattern qualitatively similar to that observed. The ratio of the amplitude of the wave (£) advancing from the northwest into Cook Strait to that (A) advancing from the southeast is substantially greater for the S₂ (B/A = 11) than for the M₂ (B/A = 2) tidal constituent and leads to the region of most rapid phase change for S₂ being shifted further to the south than that for M₂.  相似文献   

Physical oceanographic observations in Marlborough Sounds   总被引：3，自引：3，他引：0  

R. A. Heath 《新西兰海洋与淡水研究杂志》2013,47(4):691-708

Results of temperature and salinity observations with depth, current drogue measurements in Pelorus and Queen Charlotte Sounds, and a current meter record from Pelorus Sound are discussed. The circulation in both Sounds is mainly tidal. Salinities in Pelorus Sound were found to be lower than in Queen Charlotte Sound; there was a rapid decrease in salinity near the head of Pelorus Sound where the Pelorus and Kaituna rivers enter it. Residence time of water in Pelorus Sound was estimated to be about 21 days.  相似文献   

Oceanic upwelling produced by northerly winds on the north Canterbury coast,New Zealand     

R. A. Heath 《新西兰海洋与淡水研究杂志》2013,47(3):343-351

The rates of upwelling calculated from the change in temperature distribution derived from two sets of hydrological stations (0.0107 cm.r^‐1) and the rate of upwelling calculated from the wind derived transport offshore for the period between the collection of the hydrological data (0.0086 cm.s^‐1) are found to be consistent.  相似文献   

Tidal constants for McMurdo sound,Antarctica   总被引：1，自引：1，他引：0  

R. A. Heath 《新西兰海洋与淡水研究杂志》2013,47(2):376-380

Harmonic constants were evaluated from 30 days’ tidal records at a position about 0.25 miles (0.44 km) south of Winter Quarters Bay, McMurdo Sound, Antarctica. The main components are the declinational diurnal constituents O1 and K1. Comparison of the constants with those previously evaluated from nearby Pram Point (near Scott Base) shows that the amplitudes are smaller at McMurdo Sound, and that the high tide at McMurdo occurs about one hour after that at Scott Base.  相似文献   

An occurrence of low water temperatures on the north Canterbury coast (note)     

R. A. Heath 《新西兰海洋与淡水研究杂志》2013,47(2):223-226

A recorded instance of a rapid decrease in sea surface temperature on 10 April 1968 on the north Canterbury coast is found to be caused by increased transport of the Southland Current rather than by wind‐derived upwelling, and shows that gross changes in coastal current characteristics on the north Canterbury coast can occur under particular meteorological conditions.  相似文献   

Hydrology and circulation in central and southern Cook Strait,New Zealand   总被引：2，自引：2，他引：0  

R. A. Heath 《新西兰海洋与淡水研究杂志》2013,47(1):178-199

The circulation and hydrology of Cook Strait are defined using both the geostrophic method and the hydrologiieal characteristics of the different water masses. Cool, low salinity water in a branch of the Southland Current, which extends along the east coast of the South Island into Cook Strait, mixes above the depth of the continental shelf with warmer, more saline Subtropical Water from both the D'UrVille Current and the East Cape Current. Subtropical Water derived from the East Cape Current occupies the Cook Strait Canyon; below 100 m this water meets the Subtropical Water of the southwest‐flowing D'Urville Current in a convergence situated in the Oook Strait Narrows. Mixed water derived from all three currents passes eastwards across Cook Strait and up the east coast of the North Island.  相似文献   

Immature Diptera (excluding Culicidae) inhabiting phytotelmata in the Auckland and Wellington regions     

José G. B. Derraik  Allen C. G. Heath 《新西兰海洋与淡水研究杂志》2013,47(4):981-987

This study records the Diptera fauna (excluding Culicidae) breeding in phytotelmata in the Auckland and Wellington regions of New Zealand, particularly in native forest habitats. Diptera larvae were relatively abundant in the leaf axils of the native epiphyte Collospermum hastatum, and in the fallen leaves of the native nikau palm Rhypalostylis sapida. Chironomidae and Tipulidae were the most common families collected, but larvae of Anisopodidae, Ceratopogonidae, Empididae, Psychodidae, and Syrphidae were also present.  相似文献   

EARTHWORKS     

Martin J. Heath 《地学学报》1993,5(6):605-605

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