Some hydrological features of the eastern Arafura Sea and the Gulf of Carpentaria in August 1964

1966 ◽  
Vol 17 (1) ◽  
pp. 31 ◽  
Author(s):  
DJ Rochford
Keyword(s):  
Organic Phosphorus ◽  
High Surface ◽  
Coastal Region ◽  
Biological Action ◽  
Water Masses ◽  
North West ◽  
The North ◽  
Coral Sea ◽  
Arafura Sea ◽  
Phosphate Nitrate

Charts of the distribution of salinity, temperature, inorganic phosphate, nitrate nitrogen, oxygen, and particulate organic phosphorus, for the eastern Arafura Sea and Gulf of Carpentaria in August 1964 are presented. Interrelationships of these properties show that at least three water masses were identifiable in this month. Two were very low in nutrients (phosphate less than 0.20, nitrate less than 1.0 �g-atom/l) but differed in salinity (less than 33.00‰ and greater than 35.50‰). The third was high in nutrients (phosphate greater than 1.40, nitrate greater than 17 �g-atom/l) and had salinities between 33.80 and 34.70‰. The high nutrient water mass was derived from Banda Sea slope water at around 100-150 m, wlth its nutrients increased subsequently by biological action. The other two water masses were formed in the coastal region of West Irian and the Coral Sea. High surface oxygen saturation (139%) and accumulation of organic phosphorus in near-bottom waters of the eastern Arafura Sea were the result of an uplift of Banda slope waters, much earlier in the year than August. In the Gulf of Carpentaria, the August salinity temperature characteristics were formed by the southward drift along the eastern margin of Coral Sea waters, which increased in salinity and decreased in temperature by evaporation. Low salinity water of the previous summer occurred in August, only in the north-west of the gulf.

Review of Australian species of Plectranthias Bleeker and Selenanthias Tanaka (Teleostei: Serranidae: Anthiadinae), with descriptions of four new species

Zootaxa ◽  
2021 ◽  
Vol 4918 (1) ◽  
pp. 1-116
Author(s):  
ANTHONY C. GILL ◽  
JOHN J. POGONOSKI ◽  
GLENN I. MOORE ◽  
JEFFREY W. JOHNSON
Keyword(s):  
Great Barrier Reef ◽  
Reef Coral ◽  
Barrier Reef ◽  
North West ◽  
The North ◽  
Christmas Island ◽  
Lord Howe Island ◽  
Coral Sea ◽  
Tasman Sea ◽  
Arafura Sea

Australian species of the anthiadine genera Plectranthias and Selenanthias are reviewed. Twenty-two species of Plectranthias and two species of Selenanthias are recorded from Australian waters: Plectranthias sp. 1 from a seamount north of Middleton Reef and Norfolk Ridge, Tasman Sea; P. alleni Randall from off southwest Western Australia; P. azumanus (Jordan & Richardson) from off southwest Western Australia; P. bennetti Allen & Walsh from Holmes Reef, Coral Sea; P. cruentus Gill & Roberts from Lord Howe Island, and possibly off Stradbroke Island, Queensland; P. ferrugineus n. sp. from the North West Shelf and Arafura Sea; P. fourmanoiri Randall from Christmas Island and Holmes Reef, Coral Sea; P. grahami n. sp. from off central New South Wales, Tasman Sea; P. inermis Randall from Christmas Island; P. japonicus (Steindachner) from the Arafura Sea and North West Shelf; P. kamii Randall from the Coral Sea, Lord Howe Island and Christmas Island; P. lasti Randall & Hoese from the North West Shelf and off Marion Reef, Queensland; P. longimanus (Weber) from the Timor Sea, Great Barrier Reef, Coral Sea and southern Queensland; P. maculicauda (Regan) from southeastern Australia; P. mcgroutheri n. sp. from the North West Shelf; P. megalophthalmus Fourmanoir & Randall from northeast of the Whitsunday Islands, Queensland; P. melanesius Randall from southeastern Queensland and a seamount north of Middleton Reef; P. moretonensis n. sp. from off Stradbroke Island, Queensland; P. nanus Randall from the Cocos (Keeling) Islands, Christmas Island, Great Barrier Reef and Coral Sea; P. retrofasciatus Fourmanoir & Randall from the Great Barrier Reef; P. robertsi Randall & Hoese from off Queensland, Coral Sea; P. winniensis (Tyler) from the Great Barrier Reef and Coral Sea; Selenanthias analis Tanaka from the North West Shelf and Arafura Sea; and S. barroi (Fourmanoir) from west of Lihou Reef, Coral Sea. Five of the species represent new records for Australia: P. azumanus, P. kamii, P. megalophthalmus, P. melanesius and S. barroi. Previous records of P. megalophthalmus from the North West Shelf are based on misidentified specimens of P. lasti. Records of P. wheeleri from the North West Shelf are based on specimens here identified as P. mcgroutheri n. sp. A record of P. yamakawai Yoshino from Christmas Island is based on a misidentified specimen of P. kamii. Plectranthias retrofasciatus was previously recorded from the Great Barrier Reef as P. pallidus Randall & Hoese, here shown to be a junior synonym of P. retrofasciatus. Video-based records of P. kelloggi from the Great Barrier Reef appear to be based on P. retrofasciatus. Identification keys, diagnoses, character summaries, photographs and Australian distribution information are presented for all species. Full descriptions are provided for the new species and for those newly recorded from Australia. 

The continuity of water masses along the western boundary of the Tasman and Coral Seas

1968 ◽  
Vol 19 (2) ◽  
pp. 77 ◽  
Author(s):  
DJ Rochford
Keyword(s):  
Water Mass ◽  
New Caledonia ◽  
Core Layer ◽  
Water Masses ◽  
Western Boundary ◽  
Intermediate Water ◽  
North West ◽  
The North ◽  
Coral Sea ◽  
Intermediate Water Mass

Hydrological data of the Umitaka Maru (December 1967) and of H.M.A.S. Gascoyne (November-December 1965) have been used to show continuity of selected water masses from the north-west Coral Sea to the continental margin off New South Wales. The core layer properties of these water masses (salinity, temperature, oxygen) indicate that these water masses of the north-west Coral Sea are formed by the inflow from the east of the South Equatorial water mass (0 m), the upper salinity maximum water mass (150-200 m) of the central South Pacific, and of the Antarctic Intermediate water mass (800-1000 m). The inflow of the first two occurs immediately south of the Solomon Is. whilst that of the third occurs between New Caledonia and the New Hebrides. Continuity of the upper oxygen maximum of the 200-800 m layer was not examined because of doubts as to its existence as a separate water mass.

Sea snake by-catch of fish trawlers on the northern Australian continental shelf

1996 ◽  
Vol 47 (4) ◽  
pp. 625 ◽  
Author(s):  
TM Ward
Keyword(s):  
Continental Shelf ◽  
Absolute Abundance ◽  
Sea Snake ◽  
North West ◽  
The North ◽  
Sea Snakes ◽  
Exponential Decline ◽  
Arafura Sea ◽  
By Catch ◽  
Trawl Surveys

During 1986-90, 206 sea snakes were collected from Taiwanese pair-trawlers (North West Shelf, 1986-87), Thai stern-trawlers (Arafura Sea, 1986-87), RV Soela (North West Shelf, 1986) and RV Clipper Bird (Timor and Arafura Seas, 1990). Taiwanese (58 specimens; 294.8 h trawled) and Thai (71 specimens; 1244 h trawled) vessels trawled in 50-75 m and caught 10 and 7 species respectively. The Soela (41 specimens; 72.5 h trawled) and Clipper Bird (36 specimens; 103 h trawled) operated in depths of 19-198 m and each caught 12 species. Hydrophines (10 species plus one specimen from an undescribed taxon) represented 68.4% of the specimens. Aipysurines (6 species) were more common in samples from the North West Shelf (46.2% of taxa, 56.6% of specimens) than from the Timor and Arafura Seas (28.6% of taxa, 11.2% of specimens). Taiwanese boats on the North West Shelf (1980-90) and Thai boats in the Arafura Sea (1985-90) were estimated to have caught 49000 (� 5600) and 10000 (� 1250) sea snakes respectively. Trawl surveys (e.g. Soela and Clipper Bird) may be unsuitable for monitoring sea snakes, because approximately 25 surveys would be needed to detect a 20% exponential decline in absolute abundance.

Ship Observations of the Tropical Pacific Ocean along the Coast of South America

2009 ◽  
Vol 22 (2) ◽  
pp. 458-464 ◽  
Author(s):  
S. P. de Szoeke ◽  
C. W. Fairall ◽  
Sergio Pezoa
Keyword(s):  
Field Experiments ◽  
Coastal Region ◽  
Warm Pool ◽  
Water Masses ◽  
Cold Pool ◽  
Radiative Fluxes ◽  
Pool Water ◽  
The North ◽  
Cloud Properties ◽  
Stratocumulus Clouds

Abstract In October 2007 the NOAA ship Ronald H. Brown sailed southward within 300 km of the coast of Ecuador and Peru, sampling surface meteorology, air–sea turbulent and radiative fluxes, cloud properties, and upper-air soundings from the equator to 20°S. Two distinct water masses characterize the coastal region: cold-pool water below 19°C in the Southern Hemisphere, and warm-pool water above 20°C to the north, with a transition between the water masses at 2.5°S. Net turbulent and radiative fluxes warm the cool water south of 2.5°S by 100 W m−2 but do not warm the equatorial water significantly. Winds blow parallel to the shore, about 5 m s−1 over the cold pool and 7 m s−1 over the equator. Stratocumulus clouds are remarkably solid over the coastal cold pool, with only brief periods of partial clearing, mostly in the afternoon. Lower aerosol concentrations and thicker clouds observed farther from the coast on 22–23 October are coincident with a pocket of open cells seen to the west and southwest of the ship. Observations from this cruise and other NOAA Stratus cruises (2001 and 2003–07) are suitable for comparison with model simulations and provide context for future field experiments. These datasets are publicly available.

scholarly journals The impact of sea-level rise on tidal characteristics around Australasia

2018 ◽  
Author(s):  
Alexander Harker ◽  
J. A. Mattias Green ◽  
Michael Schindelegger
Keyword(s):  
Sea Level Rise ◽  
Sea Level ◽  
Tidal Dissipation ◽  
North West ◽  
The North ◽  
Arafura Sea ◽  
Coastal Features ◽  
Tidal Characteristics ◽  
Shelf Region ◽  
The Impact

Abstract. An established tidal model, validated for present-day conditions, is used to investigate the effect of large levels of sea-level rise (SLR) on tidal characteristics around Australasia. SLR is implemented through a uniform depth increase across the model domain, with a comparison between the coastal boundary being treated as impenetrable or allowing low-lying land to flood. The complex spatial response of the semi-diurnal constituents, M2 and S2, is broadly similar, with the magnitude of M2's response being greater. The most predominant features of this response are large amplitude changes in the Arafura Sea and within embayments along Australia's north-west coast, and the generation of new amphidromic systems within the Gulf of Carpentaria and south of Papua, once water depth across the domain is increased by 3 and 7 m respectively. Dissipation from M2 increases around the islands in the north of the Sahul shelf region and around coastal features along north Australia, leading to a notable drop in dissipation along Eighty Mile Beach. The diurnal constituent, K1, is found to be amplified within the Gulf of Carpentaria, indicating a possible change of resonance properties of the gulf. Coastal flooding has a profound impact on the response of tidal amplitudes to SLR, particularly K1, by creating local regions of increased tidal dissipation and altering the shape of coastlines.

Distribution and transport pathways of Panulirus ornatus (Fabricius, 1776) and Panulirus spp. larvae in the Coral Sea, Australia

2001 ◽  
Vol 52 (8) ◽  
pp. 1175 ◽  
Author(s):  
Darren M. Dennis ◽  
C. Roland Pitcher ◽  
Timothy D. Skewes
Keyword(s):  
Ocean Currents ◽  
Boundary Current ◽  
Transport Pathways ◽  
North West ◽  
The North ◽  
Coral Sea ◽  
Breeding Grounds ◽  
Equatorial Current ◽  
Torres Strait ◽  
Phyllosoma Larvae

Distribution of phyllosoma larvae and pueruli of the rock lobster Panulirus ornatus and other Panulirus species was surveyed in the north-west Coral Sea in May 1997 and compared to ocean currents. Distribution of P. ornatus larvae revealed the sources of recruits to the Torres Strait lobster fishery. Phyllosomas and pueruli of P. ornatus dominated the Panulirus spp. plankton-trawl catch. Surviving pueruli were transferred to an aquarium to await confirmation of their identity. Pregilled P. ornatus phyllosomas were most abundant approximately 300 km east of the northern Great Barrier Reef (GBR) and near the confluence of the South Equatorial Current and Coral Sea Gyre. Gilled phyllosomas were also common there but most numerous adjacent to the GBR. Pueruli were most abundant adjacent to the GBR well south of Torres Strait. The distribution of P. ornatus phyllosomas and pueruli in relation to the ocean currents supported the hypothesis that phyllosomas are transported from the Gulf of Papua breeding grounds by the Hiri boundary current into the Coral Sea Gyre and then by surface onshore currents onto the Queensland coast and into Torres Strait. Distributions of larvae of other Panulirus species and the synaxid Palinurellus wieneckii differed from those of P. ornatus.

Hydrology of the Indian Ocean. I. The Water Masses in Intermediate Depths of the South-East Indian Ocean

1961 ◽  
Vol 12 (2) ◽  
pp. 129 ◽  
Author(s):  
DJ Rochford
Keyword(s):  
Indian Ocean ◽  
West Indian ◽  
Water Masses ◽  
The South ◽  
North West ◽  
East Indian ◽  
The North ◽  
The Indian Ocean ◽  
The Antarctic ◽  
East Indian Ocean

Three water masses have been identified from maxima and minima in temperature-salinity diagrams for intermediate depths of the south-east Indian Ocean. (1) The Antarctic Intermediate occurred as a salinity minimum within the density range of 7.00-27.28 σt. (2) The North-West Indian Intermediate was found as a salinity maximum within the σt range 27.20-27.50. (3) The Banda Intermediate, lying below the North-West Indian Intermediate, had the characteristic of a salinity minimum within the σt range of 27.28-27.59. Preformed phosphate has been found useful as a third conservative property for the identification of major paths of spreading. The distribution and paths of spreading of the three water masses are shown in charts of the Indian Ocean east of 90�E.

scholarly journals Mapping of Tertiary basalts on the northern Blosseville Kyst, East Greenland

1979 ◽  
Vol 95 ◽  
pp. 85-86
Author(s):  
W.S Watt ◽  
M Watt
Keyword(s):  
Coastal Region ◽  
Fault System ◽  
Detailed Knowledge ◽  
Stratigraphic Sequence ◽  
East Greenland ◽  
North West ◽  
The North ◽  
Field Team

During the 1978 season work carried out by a helicopter-supported field team was concentrated in the region around Kap Dalton and Stenos Gletscher. The work formed a continuation of that carried out in 1975 in the coastal region between Kap Dalton and Steward Ø. The main objectives were to link the stratigraphic sequence of the coastal region to that established for the Scoresby Sund area to the north and north-west. For this it was essential to gain a detailed knowledge of the inland behaviour of the coastal fault system.

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