Seasonal upwelling along the south-eastern coastline of South Australia

1981 ◽  
Vol 32 (6) ◽  
pp. 843 ◽  
Author(s):  
RK Lewis
Keyword(s):  
Nitrate Concentration ◽  
South Australia ◽  
Horizontal Distribution ◽  
The South ◽  
South Eastern ◽  
Background Levels ◽  
Shelf Region

The hydrology of the south-eastern waters of South Australia over the period 1973-77 is described with particular reference to a wind-induced summer upwelling. The nitrate concentration of upwelling water is found to be 30 (surface) to 70 (50m depth) times greater than the average background levels of 0.1-0.9 mmol m-3. The horizontal distribution of temperature and salinity shows that upwelling along the shelf region is not uniform but has a number of localized centres. During January 1976 centres of upwelling water were found at three locations along the coastline.

Structure of coastal upwelling events observed off the south-east coast of South Australia during February 1983 - April 1984

1987 ◽  
Vol 38 (4) ◽  
pp. 439 ◽  
Author(s):  
RB Schahinger
Keyword(s):  
Satellite Images ◽  
East Coast ◽  
Coastal Upwelling ◽  
South Australia ◽  
The South ◽  
Shelf Circulation ◽  
Upwelled Water ◽  
Shelf Region ◽  
Offshore Transport

Observations of upwelling along the south-east coast of South Australia during the summers of 1983 and 1984 are presented. In situ measurements were obtained from a number of current meters moored across the continental shelf near 37.5�S.,139.5�E. These were complemented by wind and sea level measurements along the coast and also monthly hydrographic surveys. Differences between summer and winter regimes are discussed in both physical and dynamical terms. The summer weather pattern gives rise to winds which are favourable to upwelling along this coast more than 50% of the time (i.e. winds from the south-east quarter). The evolution of two upwelling events and the associated shelf circulation are documented. Salient features include the offshore transport of water in a shallow surface layer 0 (20 m) in response to south-easterly winds; an onshore compensatory flow occurs almost immediately below. The summer thermocline shoals soon after the onset of winds favouring upwelling, leading to pronounced cross-shelf surface-temperature gradients with cooler (upwelled) water at the surface near the coast. The surfaced thermocline moves offshore and attains an equilibrium position in the vicinity of the shelf edge (after 4-5 days), as shown by infrared satellite images, while water from depths of 250-300 m encroaches onto the shelf. Alongshore currents reach speeds of more than 50 cm s-1 in the outer-shelf region and are strongly influenced by the position of the upwelling front. Brief comparisons are drawn with other upwelling regions.

Trace elements in some South Australian terra rossa and rendzina soils

1959 ◽  
Vol 10 (1) ◽  
pp. 52 ◽  
Author(s):  
RM McKenzie
Keyword(s):  
Trace Elements ◽  
South Australia ◽  
The State ◽  
The South ◽  
Terra Rossa ◽  
South Eastern ◽  
Copper And Zinc ◽  
Nickel Copper ◽  
Lower South ◽  
Cobalt Copper

The concentrations of cobalt, zirconium, nickel, copper, vanadium, molybdenrun, manganese, and zinc have been determined in 10 profiles of terra rossas and 9 of rendzinas from South Australia. The soils from the lower south-eastern part of the State contain lower concentrations of all these elements than do those near Adelaide, particularly for cobalt, copper, and zinc. This difference is reflected in the concentrations found in the underlying calcareous material, and can account for the widespread deficiencies in cobalt and copper which occur ill the South-East.

Monoecious Nitella species (Characeae, Charophyta) from south-eastern mainland Australia, including Nitella paludigena sp. nov.

2008 ◽  
Vol 21 (3) ◽  
pp. 201 ◽  
Author(s):  
Michelle T. Casanova ◽  
Kenneth G. Karol
Keyword(s):  
South Australia ◽  
The South ◽  
Tea Tree ◽  
Australian Species ◽  
South Eastern ◽  
South West

Identification of Australian species of Nitella is problematic. Several species of monoecious Nitella have been described from south-eastern mainland Australia, but identification of these based on current treatments has been difficult. In response to the discovery of a new monoecious Nitella from the swamps of the Fleurieu Peninsula in South Australia, the monoecious species of Nitella from south-eastern mainland Australia were examined and compared. N. paludigena M.T.Casanova & K.G.Karol is distinguished from other monoecious species on the basis of its overall vegetative morphology and oospore morphology. N. paludigena is found in peaty tea-tree (Leptospermum sp) swamps on the Fleurieu Peninsula in South Australia, and in the south-west of Victoria. A description of the morphology and ecology of the five monoecious Nitella species from south-eastern mainland Australia is given, along with a key.

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