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   

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   

Examination and Refinement of the Determination of Aqueous Hydrogen Sulfide by the Methylene Blue Method     

Brandi Kiel Reese  David W. Finneran  Heath J. Mills  Mao-Xu Zhu  John W. Morse 《Aquatic Geochemistry》2011,17(4-5):567-582

The accurate and precise measurement of total sulfide has been of major interest for well over a century. The most commonly used method involves the formation of a methylene blue?Csulfide complex and spectrophotometric measurement of its concentration. The study presented herein compares the two most commonly used methods as outlined in Standard Methods for the Examination of Water and Wastewater (in APHA, Standard methods for the examination of water and wastewater, Washington, 1960) and by Cline (Limnol Oceanogr 14:454?C458, 1969). In addition, this study clarifies the existing confusion of Cline??s reagent preparation procedure, as it is apparent that various interpretations exist among research groups regarding reagent preparation. After evaluating both methods with respect to precision and accuracy, detection limit, sample storage time, and ease of use, the method outlined in Cline was determined to be superior. Furthermore, we suggest that the reagent concentration has to be optimized depending on the range of sulfide concentrations to increase the accuracy and precision of the method.  相似文献   

Blending single beam RoxAnn and multi-beam swathe QTC hydro-acoustic discrimination techniques for the Stonehaven area,Scotland, UK     

Natalia Serpetti  Mike Heath  Eric Armstrong  Ursula Witte 《Journal of Sea Research》2011,65(4):442-455

Surface properties of the seabed in a 180 km² area of coastal waters (14–57 m depth) off northeast Scotland were mapped by hydro-acoustic discrimination using single and multi-beam echosounders linked to signal processing systems (RoxAnn for the single beam, and Questor Tangent Corporation (QTC) Multiview for the multibeam). Subsequently, two ground truthing surveys were carried out, using grab and TV sampling. The RoxAnn and QTC-Multiview outputs showed strong similarity in their classifications of seabed types. Classifications generated by QTC-Multiview were used to supervise those based on seabed roughness and hardness indices produced by the RoxAnn system and thereby develop a ‘blended’ map based on both systems. The resulting hydro-acoustic classes agreed well with a cluster analysis of data on sediment grain sizes from the grab sampling, and indicated that the area could be described by distinct regions of surface texture and surficial sediments ranging from muddy sand to boulders and rock.  相似文献   

Changes in the structure and function of the North Sea fish foodweb, 1973-2000, and the impacts of fishing and climate     

Heath  Michael R. 《ICES Journal of Marine Science》2005,62(6):1202

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WORLD'S END     

M.J. Heath 《地学学报》1993,5(2):202-204

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Reconstructed density and velocity fields from the 2MASS Redshift Survey     

Pirin Erdo&#;du  Ofer Lahav  John P. Huchra †  Matthew Colless  Roc M. Cutri  Emilio Falco †  Teddy George  Thomas Jarrett  D. Heath Jones  Lucas M. Macri  Jeff Mader  Nathalie Martimbeau  Michael A. Pahre  Quentin A. Parker  Anaïs Rassat  Will Saunders 《Monthly notices of the Royal Astronomical Society》2006,373(1):45-64

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EARTHWORKS     

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

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